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ics for communications broadband multichannel subscriber line-interface circuits for splitterless g.lite applications b-muslic peb 4550 peb 3554 peb 55504 peb 35508 preliminary product overview 05.99
? for questions on technology, delivery and prices please contact the infineon technologies offices in germany or the infineon technologies companies and representatives worldwide: see our webpage at http://www.infineon.com %0x6/,& 5hylvlrq+lvwru\ &xuuhqw9huvlrq previous version: page (in previous version) page (in current version) subjects (major changes since last revision) (glwlrq 3xeolvkhge\ ,qilqhrq7hfkqrorjlhv$*l*u 6& %dodqvwud?h 0?qfkhq ? infineon technologies ag i. gr. 1999. all rights reserved. $wwhqwlrqsohdvh as far as patents or other rights of third parties are concerned, liability is only assumed for components, not for applications, processes and circuits implemented within components or assemblies. the information describes the type of component and shall not be considered as assured characteristics. terms of delivery and rights to change design reserved. due to technical requirements components may contain dangerous substances. for information on the types in question please contact your nearest infineon technologies office. infineon technologies ag is an approved cecc manufacturer. 3dfnlqj please use the recycling operators known to you. we can also help you C get in touch with your nearest sales office. by agreement we will take packing material back, if it is sorted. you must bear the costs of transport. for packing material that is returned to us unsorted or which we are not obliged to accept, we shall have to invoice you for any costs incurred. &rpsrqhqwvxvhglqolihvxssruwghylfhvruv\vwhpvpxvwehh[suhvvo\dxwkrul]hgiruvxfksxusrvh critical components 1 of the infineon technologies ag, may only be used in life-support devices or systems 2 with the express written approval of the infineon technologies ag. 1 a critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the failure of that life-support device or system, or to affect its safety or effectiveness of that device or system. 2 life support devices or systems are intended (a) to be implanted in the human body, or (b) to support and/or maintain and sustain human life. if they fail, it is reasonable to assume that the health of the user may be en- dangered. abm ? , aop ? , arcofi ? , arcofi ? -ba, arcofi ? -sp, digitape ? , epic ? -1, epic ? -s, elic ? , falc ? 54, falc ? 56, falc ? -e1, falc ? -lh, idec ? , iom ? , iom ? -1, iom ? -2, ipat ? -2, isac ? -p, isac ? -s, isac ? -s te, isac ? -p te, itac ? , iwe ? , musac ? -a, octat ? -p, quat ? -s, sicat ? , sicofi ? , sicofi ? -2, sicofi ? -4, sicofi ? -4c, slicofi ? are registered trademarks of infineon technologies ag. ace ? , asm ? , asp ? , potswire ? , quadfalc ? , scout ? are trademarks of infineon technologies ag.
%0x6/,& preliminary product overview 3 05.99 1 2yhuylhz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 1.1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 1.2 typical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 1.3 product family overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 2 )xqfwlrqdo'hvfulswlrq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 2.1 b-slic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 2.2 b-qap adsl-lite analog frontend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 2.3 alidd adsl-lite data pump functions . . . . . . . . . . . . . . . . . . . . . . . . . . .16 2.4 b-mupp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 2.5 interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 2.6 programmable voice-path parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 2.6.1 borscht functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 2.6.2 additional line circuit functions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 2.6.3 dc feeding characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 2.7 power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 2.8 programmable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 3 2shudwlrqdo'hvfulswlrq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 3.1 active with concurrent data and voice transmission . . . . . . . . . . . . . . . . .29 3.2 active-voice-only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 3.3 ringing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 3.4 power-saving modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 3.5 subscriber loop modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 3.6 line testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 3.6.1 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 3.6.2 traditional line testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 3.6.3 itdf (integrated test and diagnostic functions) with the b-muslic . . .34 4 ,qwhuidfhv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 4.1 pcm interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 4.2 iom-2 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 4.3 utopia-2 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 4.4 b-mupp 8-bit microcontroller interface . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 4.5 alidd 8/16-bit microcontroller interface . . . . . . . . . . . . . . . . . . . . . . . . . . .41 4.5.1 host interface signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 4.6 tip-and-ring interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 5 $ssolfdwlrq&lufxlwdqg7rrov . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 5.1 typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 5.2 support tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 5.2.1 b-muslicos coefficient calculating software . . . . . . . . . . . . . . . . . . . .44 5.2.2 smart 35508 and smart 55504 tool packages . . . . . . . . . . . . . . . . .45 6 3dfndjh2xwolqhv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
%0x6/,& preliminary product overview 4 05.99 3uhidfh this document summarizes the broadband multichannel subscriber line-interface circuits for splitterless g.lite applications (b-muslic). the b-muslic is a highly integrated chipset integrating adsl-lite functionality with the proven muslic pcm codec filter for analog telephony applications. this product provides all adsl-lite functionality required by itu-t g.992.2, and provides software-programmable borscht functionality to meet worldwide voice telephony standards. the b-muslic provides up to 8 adsl lite and analog voice channels, is totally programmable, and integrates many previously external functions on-chip. this document contains general information about the b-muslic and describes in brief the main features, functional blocks, interfaces, and typical applications of the chipset. please refer to related documentation for technical specifications. 5hodwhg'rfxphqwdwlrq product overview mucado (multichannel asymmetrical dsl system for g.lite) &rqyhqwlrqv8vhglq7klv'rfxphqw abbreviations and acronyms are shown at the end of the document.
%0x6/,& 2yhuylhz preliminary product overview 5 05.99 2yhuylhz the b-muslic chipset (figure 1-1) is used in adsl-lite dslams for central offices (cos) and digital-loop carrier systems (dlcs). the %0x6/,& (broadband multichannel subscriber line-interface circuits for splitterless g.lite applications) chipset comprises: ? %6/,& ( peb 4550 broadband ringing slic) C single-channel broadband subscriber line circuit ? %4$3 (peb 3554) adsl.lite analog frontend C 4-channel ad/da converter with integrated filters ? $/l'' (peb 55504) C 4-channel adsl-lite data pump compatible with g.lite standard ?%0x33 (peb 35508 broadband multichannel processor for pots) C 8-channel voice processing dsp with m c and pcm/iom2 interface ? )ljxuh $ufklwhfwxuhri%0x6/,&&klsvhwrqdq$'6//lwh/lqhfdug %6/,& 3(% %6/,& 3(% %6/,& 3(% %6/,& 3(% '$7$92,&( %4$3 3(% [$' 92,&( %0x33 3(% 92,&( 352&(6625 '$7$92,&( '$7$92,&( '$7$92,&( $/l'' 3(% '$7$'63 '$7$ 92,&(3&0 '$7$$70 0hpru\ &rqwuroohu
%0x6/,& 2yhuylhz preliminary product overview 6 05.99 $'6//lwh/lqhfdug$ufklwhfwxuh the b-muslic chipset supports data transmission at rates of 1536 kbps downstream and 512 kbps upstream simultaneously with voice transmission. eight-bit data is sent to the alidd using a utopia-2 atm interface, while voice is sent to the b-mupp using either a pcm highway or the iom-2 interface (figure 1-3). programming, control, and signalling information from the alidd and the b-mupp is sent to the local processor via a flexible 8-bit parallel m p interface. adsl-lite utilizes the existing copper pair that traditionally has been used only for pots service. adsl-lite offers subscribers the advantage of concurrent splitterless data and voice transmission. the data and voice services are separated within the b-muslic chipset; thus, no external splitter is required (figure 1-1). for each channel, the linecard provides a line driver, an a/d and d/a converter, and an adsl-lite data pump. ?- )ljxuh *hqhudo$ufklwhfwxuhriwkh$'6//lwh/lqhfdug the b-muslic is an optimized and integrated solution for linecards, providing 4 channels of adsl-lite data transmission at 1536 kbps downstream and up to 512 kbps upstream in one chipset. eight-bit data is sent to the alidd using an utopia-2 atm interface. programming and control information for alidd and b-mupp is exchanged with a local processor via a flexible 8- or 16-bit parallel m p interface. %4$3 1/x sense %6/,& /lqh adc dec int int dec 64khz 1.1mhz 276khz *x dac pcb agc vo i c e processing control 3&0,20 9rlfh ?& %0x33 $/l'' 'dwd'63 fkdqqho */lwh $70 8723,$gdwd ?&
%0x6/,& 2yhuylhz preliminary product overview 7 05.99 )hdwxuhv ? application for cos, access networks (ans), dlcs, pbxs ? highly integrated ? 8-channel g.992.2 (adsl-lite) compliant ? data pump fully software upgradeable ? integrated data/voice separation, no additional pots splitter required ? no separate adsl linecard required, no dslam required ? m c/pcm and iom-2 interfaces for voice ? data interface switchable between utopia-2 or m c interface ? integrated programmable balanced ringing (85 vrms) with support for external unbalanced ringing ? voice telephony in accordance with relevant itu-t q.552 z interface, lssgr, bellcore, and dtag recommendations ? channel-independent programmable filters for country-specific requirements: C impedance matching C transhybrid balancing C frequency response C receive/transmit levels C dc-feeding ? line supervision ? integrated test and diagnostic functionality (itdf) C line test, circuit test, board test ? utopia-2 compliant data interface ? m c interface for chipset control ? high-performance 13-bit a/d and d/a conversion ? gpio pins ? data-only mode uses tones #1-5 for upstream direction (optional) ? chipset family offers - migration path to full-rate adsl - higher integration (fewer external parts, more channels) - solution for dslams (adsl-lite data only); refer to separate product overview ? power down mode with off-hook (voice) and remote active request (data) detection; each channel can be powered down individually
3'62 304)3 374)3 304)3 %urdgedqg0xowlfkdqqho6xevfulehu/lqh,qwhuidfh &lufxlwviru6solwwhuohvv*/lwh$ssolfdwlrqv %0x6/,& semiconductor group 8 preliminary product overview 05.99 9huvlrq &026%l&0266pduw3rzhu 7\sh 3dfndjh peb 4550 p-dso-20-5 peb 3554 p-mqfp-100-2 peb 55504 p-tqfp-144-1 peb 35508 p-mqfp-64-1 3(% 3(% 3(% 3(% 7\slfdo$ssolfdwlrqv many applications benefit from the highly integrated, versatile b-muslic architecture. product reliability and manufacturability are enhanced by the high level of integration and by fabrication in low-power mixed- signal cmos technology. the inherent flexibility and scalability reduces time-to-market, inventory costs, and support administration. the following list and figures show some of the typical applications for which the b-muslic was designed. ? highly integrated adsl-lite linecards for linecards with 4, 8, or more channels in: C cos (figure 1-3) Cpbxs Cans C dlcs
%0x6/,& 2yhuylhz preliminary product overview 9 05.99 )ljxuh $'6//lwh/lqhfduglqd&hqwudo2iilfh an 8-channel adsl-lite linecard in a central office is depicted in figure 1-4. the b- muslic chipset or a 8-channel data/voice linecard consists of: C 8 x b-slic C 2 x b-qap C 2 x alidd C 1 x b-mupp
%0x6/,& 2yhuylhz preliminary product overview 10 05.99 ? )ljxuh &kdqqho$'6//lwh/lqhfduglqd&hqwudo2iilfh %0x33 3(% 92,&( 352&(6625 $/l'' 3(% '$7$'63 92,&(3&0 0hpru\ &rqwuroohu %4$3 3(% [$' %6/,& 3(% '$7$92,&( %6/,& 3(% '$7$92,&( %6/,& 3(% '$7$92,&( %6/,& 3(% '$7$92,&( %4$3 3(% [$' %6/,& 3(% '$7$92,&( %6/,& 3(% '$7$92,&( %6/,& 3(% '$7$92,&( %6/,& 3(% '$7$92,&( $/l'' 3(% '$7$'63 '$7$ '$7$$70 '$7$$70 '$7$
%0x6/,& 2yhuylhz preliminary product overview 11 05.99 3urgxfw)dplo\2yhuylhz this document describes the b-muslic and its features. the roadmap for the b-muslic includes higher integration, and the b-muslic-f, which will support full-rate adsl according to g.992.1. for data-only g.lite dslam applications, refer to the mucado l/f documentation. in contrast to the b-muslic architecture described above, the mucado l is a highly integrated chipset solution for adsl-lite data-only service without voice-transmission. it is targeted at dslam applications that support adsl-lite.
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 12 05.99 )xqfwlrqdo'hvfulswlrq this section describes the functional blocks of the b-muslic chipset (figure 2-1). functions are described in detail in the following sections: ? 2.3 alidd adsl-lite data pump functions ? 2.2 b-qap adsl-lite analog frontend ? 2.4 b-mupp ? 2.1 b-slic ? 2.5 interfaces ? 2.6 programmable voice-path parameter ? 2.7 power dissipation ? 2.8 programmable parameters
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 13 05.99 ? )ljxuh %0x6/,&fklsvhweorfngldjudp signalling/ supervision prefi buffer dc a/d dc d/a prefi voice a/d agc pofi adsl- lite a/d pcb pofi voice + data d/a wake up filter b-mupp interface alidd interface b-qap (4 channel analog front end) i-sense v-sense b- filter b-slic (1 channel broadband slic) b-qap interface c c o n t r o l m u x i o m - 2 p c m pll1 pll2 clk gen power up reset voice dsp reset b-mupp (8 channel pots dsp) signalling/ supervision voice + data (to subscriber line) to microprocessor pcm/iom-2 to microprocessor to atm service tc + utopia-2 b-qap interface fci framer coder interlea ver % x v pre- proces- sing dsp core x- ram y- ram up interface timer gpio prog. ram memory alidd 4 channel adsl-lite data pump clock synthesis clock or crystal dec dec int int dec
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 14 05.99 the b-muslic chipset is a cost-effective, high-performance solution for integrated voice and data (ivd) adsl-lite linecards according to the itu-t recommendation g.992.2. it offers splitterless operation (no splitter in co and no splitter at cpe needed) and a fully-featured solution for voice telephony. the detailed functional block (figure 2-5) shows how all g.992.2 functions and voice functions are implemented using 4 integrated circuits. the alidd is a dsp optimized for adsl-lite; it offers an utopia-2 interface for data, and a synchronous parallel m c interface for programming and control. the mixed-signal b-qap provides 4 channels of a/d and d/a conversion and filtering. the b-mupp is a digital signal processor for analog voice telephony, controls the b-qap and generates required clocks. its parallel interface connects to a m c. the b-slic provides all necessary line feeding functionality and has very low harmonic distortion. %6/,& the b-slic (broadband subscriber line interface circuit) is used as the interface between the telephone line and the b-qap/b-mupp/alidd within integrated voice and data linecards. it offers high-voltage functionality. features: ? high-voltage line feeding ? very linear data transmission C thd = -70db at 550 khz (downstream) C gbw = 20 mhz (downstream) ? power spectral density -40dbm/hz ? internal ring signal injection up to 85 vrms (balanced) ? sensing of transversal and longitudinal line current ? reliable170 v smart technology ? boosted battery mode for long telephone lines ? thermal shutdown ? small p-dso-20 power package %4$3$'6//lwh$qdorj)urqwhqg the b-qap contains all analog frontend functions for 4 independent voice and g-lite channels with separate interfaces to 4 b-slics. in the downstream direction, the serial data bitstream received from the alidd and the serial voice bitstream received from the b-mupp is combined into on datastream and then converted to analog with a d/a converter. the signal passes a programmable gain stage before it reaches the external b-slic. in the upstream direction, the received signal is converted to a digital data stream and then separated into the data bitstream for alidd and the voice bitstream for
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 15 05.99 b-mupp. after passing hardware filters the bitstream is transferred to the alidd and b- mupp. also common to all 4 channels are the serial, digital interfaces to alidd and to b-mupp. ? )ljxuh $'6//lwh$qdorj)urqwhqg%4$32qo\ri&kdqqhov6krzq )hdwxuhv ? 4-channel analog frontend for pots and g.lite data transmission ? no trimming or adjustments required ? advanced low-power 0.5-m bicmos technology ? high performance 13-bit a/d and d/a conversion ? 4-pin serial interface to b-mupp for voice path ? differential analog inputs/outputs ? 3 operating modes: power-down, active (voice and /or data) and ringing ? programmable transmit gain for power cut back on short lines ? automatic gain control ? very low noise and distortion in whole downstream path ? 5-pin serial interface to alidd for data path ? bicmos technology signalling/ supervision prefi buffer dc a/d dc d/a prefi voice a/d agc pofi adsl- lite a/d pcb pofi voice + data d/a wake up filter b-mupp interface alidd interface b-qap (4 channel analog front end) dec dec int int dec
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 16 05.99 ? standard smd p-mqfp-100-2 package $/l''$'6//lwh'dwd3xps)xqfwlrqv the alidd is an itu-t g.992.2-compliant data pump capable of handling up to 4 channels of g.lite. the alidd has a flexible architecture to ensure compatibility with future versions and extensions of the standard. )hdwxuhv ? dsp-based itu-t g.992.2-compliant data pump for 4 channels ? internal ram eliminates need for external ram and allows software upgradability ? 8/16-bit parallel m c interface with mailbox interface ? 8 bit utopia-2 interface ? built-in pll; clko can be used to clock another alidd ? general-purpose i/o pins ? power-down mode ? smd p-tqfp-144-1 package ? advanced low-power cmos technology adsl.lite, also called g.lite, is a broadband transmission standard for the frequency range from 25 khz (0 khz optional) to 552 khz. because of the physical separation into two different frequency ranges for voice and data transmission the frequency division multiplexing (fdm) allows concurrent voice and data transmission without the need for a splitter. different frequency ranges are used for pots band, and upstream and downstream bands. to ensure proper concurrent transmission of voice and data, a guard band is imposed between the pots band and the upstream band. g.lite specifies dmt (discrete multitone transmission) based on a fast fourier transform (fft) and a inverse fft to allocate the transmitted bits among many narrowband qam-modulated tones. the number of bits depends on the transport capacity of each tone. each of these narrowbands has a bandwidth of 4.3125 khz. the different corner frequencies are shown in figure 2-3.
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 17 05.99 )ljxuh )uhtxhqf\%dqgvri)'0iru*/lwh the data processing of the upstream and downstream path is shown in figure 2-4. for detailed information on data processing, refer to the data sheet for the alidd ( 7%' ). )ljxuh 6lpsolilhg%orfn'ldjudpri'dwd)orzzlwklq$/l'' transmit power frequency pots band upstream band downstream band guard band carrier 2-5 552 4 khz 25,875 138 framer equalizer qam decoder deinterlea ver r/s decoder crc de- scrambler inv- framer ifft qam encoder interleaver r/s coder crc scrambler fft sample pre-/post processing payload data aoc/eoc s=1,2,4,8,16 r=0,4,8,16 d=1,...,16 2-15 bits per tone 128 tones 32 tones 2-15 bits per tone d=1,...,8 s=1,2,4,8,16 r=0,4,8,16 payload data aoc/eoc 1,104 ks/s 276 ks/s download from atm to cpe upload from cpe to atm
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 18 05.99 ? )ljxuh $/l''%orfn'ldjudp in downstream direction (co to cpe), the atm data stream received via the utopia-2 interface is dmt-modulated and then transferred as a serial bitstream to the analog frontend b-qap. the received serial bitstream from the b-qap is demodulated and sent to the utopia-2 interface as atm cells. +rvw,qwhuidfh0dloer[)xqfwlrqv to simplify communications across the host interface, the alidd has a mailbox for passing messages and control information between itself and the host. the mailbox consists of 512x16 bits in both read and write directions. please refer to section 4.5 alidd 8/16-bit microcontroller interface . &orfn6\qwkhvlv the alidd has a flexible clock-synthesis circuit. consequently, the alidd can be clocked internally at 4096 khz, or with an external crystal. also, the clock output is available to feed to other alidd chips, thereby eliminating the need for an external crystal for every other alidd on the board. to microcontroller to atm service tc + utopia-2 b-qap interface fram er coder inter- leaver %xv pre- proces- sing dsp core x- ram y- ram up interface timer gpio prog. ram memory alidd 4 channel adsl- lite data pump clock synthesis clock or crystal to b-qap
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 19 05.99 1r([whuqdo65$05htxluhg the alidd has on-chip memory to support all internal processing of the adsl-lite channel. the alidd is fully software-upgradable. *hqhudo3xusrvh,qsxw2xwsxw to facilitate system integration, the alidd has several programmable gpio pins. these pins are accessed via the alidd parallel m c interface. *&rpsoldqfh the alidd complies with g.992.2, g.lite. %0x33 the b-mupp performs the voice processing and controls the b-qap. the programmable voice parameters can be controlled through the b-mupp. )hdwxuhv ? digital chip optimized for control of a 8-channel pots/g.lite-based system ? control of 2 b-qap analog frontends (8 channels) ? very small amount of glue logic required ? no trimming or adjustment required ? specification according to itu-t q.552 z interface, lssgr, and dtag recommendation ? 8-bit parallel microcontroller interface for intel-, motorola-like processors ? host interface running in multiplexed or demultiplexed mode ? built-in pll and clock generation ? pcm-encoded digital voice transmission (a-law, m -law) ? iom-2 or pcm highway for voice path ? programmable digital filter for C impedance matching C transhybrid balancing C frequency response C gain ? advanced test capabilities C integrated line and circuit tests C 2 programmable tone generators ? digital programmable dc characteristics C programmable constant current from 0 to 50 ma C programmable resistive values from 0 to 2 x 800 w C programmable constant voltage ? programmable integrated teletax (ttx) injection and filtering during active mode in onhook and offhook states C programmable up to 10 vrms at tip-and-ring wire of the b-slic
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 20 05.99 C programmable frequency (12/16 khz) ? polarity reversal (either hard-coded or software-programmable) ? integrated (balanced) ringing generation with zero crossing injection C programmable frequency between 16.6 and 70 hz C programmable amplitude up to 85 vrms at tip-and-ring of the b-slic ? offhook detection with programmable thresholds for all operating modes ? integrated ring trip detection with zero crossing turn-off function ? ground start and loop start possible ? 4 gpio pins ? 4 pins for linecard identification ? 3 operating modes: power-down, active and ringing ? smd p-mqfp-64 package ? advanced low-power cmos technology ? )ljxuh %0x33 ,qwhuidfhv the b-muslic chipset has the following interfaces: ? 8-bit parallel m p interface for multiple processor types (b-mupp) ? pcm/iom2 interface b-mupp ? 8/16-bit parallel m p interface for multiple processor types (alidd) ? utopia-2 interface (alidd) b-qap interface c c o n t r o l m u x i o m - 2 p c m pll1 pll2 clk gen power up reset voice dsp reset b-mupp (8 channel pots dsp) to microprocessor pcm/iom-2 to b-qap
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 21 05.99 the parallel c interface can be set to intel/siemens multiplexed mode, intel/siemens demultiplexed mode, or motorola demultiplexed mode. the chipset is programmed and controlled via this interface. 8-bit data traffic is moved through a utopia-2 interface. voice data is moved through the pcm or iom2 interface. please refer to &kdswhu for detailed information about the interfaces. 3urjudppdeoh9rlfhsdwk3dudphwhu the b-muslic forms a complete pots interface via control loops for both the ac and dc paths. the transversal and longitudinal currents on the line are sensed in the b-slic and reported to the b-qap. the current sense signal is converted to a voltage by an external resistor. a capacitor separates the transversal line current into dc and ac components.the ac and dc voltage signals are converted to digital in the b-qap and sent to the b-mupp for processing. the b-mupp processes the ac and dc signals and sends them back to the b-qap where they are converted to analog and sent to the b- slic. the b-slic then combines the ac and dc signals, amplifies them and drives them onto the subscriber line. via this path the subscriber line current is sensed, processed and an appropriate voltage is then applied to the subscriber line. since all of the processing is done in the digital domain, it is possible to change the electrical characteristics of the line by software. %256&+7)xqfwlrqv conventional linecard designs need a number of external components to adapt the circuit for use in different countries and applications. the b-muslic chipset integrates the following programmable functions on-chip: ? dc (battery) feed characteristics ? ac impedance matching ? transmit gain ? receive gain ? hybrid balance ? frequency response in transmit and receive direction ? ring frequency and amplitude ? hook, ring-trip, and ground-key thresholds ? test and diagnostic functions ? ttx/pulse metering one of the primary challenges of linecard development is to adapt the above-mentioned functions to country-specific requirements. because these functions are software programmable, it is not necessary to change the linecard hardware to meet different country requirements or parameters. because signal processing within the b-mupp is
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 22 05.99 completely digital, it is possible to adapt to country-specific requirements by simply updating the coefficients that control the dsp that processes all the data. this means, for example, that changing impedance matching or hybrid balancing no longer requires hardware modifications. the digital nature of the filters and gain stages also assures high reliability, no drifts due to temperature or time, and minimal variability among different lines. also, since each channel is processed independently, it is possible to configure different channels for different line characteristics. %dwwhu\)hhglqj an analog line circuit provides the voltage and current for subscriber equipment. in conventional line circuits, extra hardware is needed to adapt the battery feed characteristics to the requirements for different applications and countries. with the b- muslic chipset, the battery-feed (dc) characteristics can be programmed in the b- mupp itself and applied to the line via the b-slic. 2yhuyrowdjh3urwhfwlrq reliable overvoltage protection is provided by the robust 170 v slic technology together with a few inexpensive external parts such as varistors, resistors and thyristor diodes. 5lqjlqj the ringing signal is a low-frequency, high-voltage signal to the subscriber equipment. in conventional line circuits, the ringing voltage (40 to 85 vrms) is generated in an external ringing generator and applied to the tip-and-ring lines by a relay. with the b- muslic chipset, the ringing generator is integrated and no relay is needed (for balanced ringing only). the ringing signal is generated in the low-voltage b-mupp and amplified in the high-voltage b-slic. the b-muslic supports balanced and unbalanced ringing. with balanced ringing, the ringing voltage is applied differentially to the tip-and-ring lines. with unbalanced ringing, the ringing voltage is applied to either the tip or ring line against a potential that is near ground by an external ringing generator with relays. 6ljqdolqj6xshuylvlrq a linecard must detect onhook-to-offhook transitions in both non-ringing (hook switch detection) and ringing states (ring trip detection). with the b-muslic chipset, the thresholds for offhook and ring trip detection can be programmed in the b-mupp to suit different applications without changing external components.
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 23 05.99 &rglqj the b-muslic encodes an analog input signal to a digital pcm signal, and decodes a pcm signal to an analog signal. a-law, m -law, and 16-bit linear coding is supported and is selected via software. +\eulgiruzluh&rqyhuvlrq the subscriber equipment is connected to a 2-wire interface (tip-and-ring) where information is transmitted full-duplex. for digital transmission through the switching network, the information must be split into separate transmit and receive paths (4 wires). to avoid generating echoes, the hybrid function requires a balanced network matching the line impedance. since the hybrid balance in the b-muslic is performed in the digital domain, the hybrid balance can be changed without altering the external hardware. 7hvwlqj subscriber loops can have many kinds of faults. access to the analog loop is necessary to perform the regular measurements involved in monitoring the local loop. line-circuit functions must also be tested. in conventional line-circuit solutions, test units have to be switched to perform loop- and line-circuit tests. a remote testing unit and relays are normally necessary to perform a full range of tests. the only external component required by the b-muslic chipset is 1 test relay to measure the reference voltage, all other functions are provided within the chipset, see itdf (integrated test and diagnostic functions) with the b-muslic on page 34 . $gglwlrqdo/lqh&lufxlw)xqfwlrqv 7hohwd[0hwhulqj in many countries, pulse-metering ttx signals can be sent to the subscriber for billing purposes. a 12/16-khz sinusoidal metering burst has to be transmitted. a 12/16-khz notch filter is provided in the transmit path to prevent overloading the transmit a/d converter. 3rodulw\5hyhuvdori7lsdqgulqj the b-muslic also supports metering by polarity reversal by changing the polarity of the tip-and-ring lines. polarity reversal is user-programmable to be either hard-coded or soft- coded. *urxqg6wduw0rgh in applications using ground-start-loop signaling, the b-muslic can be set in the ground-start mode. in this mode, the tip wire is switched to high-impedance mode. the
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 24 05.99 input voltage to the b-qap is compared to a programmable threshold value in the b- mupp. '&)hhglqj&kdudfwhulvwlfv analog telephones are supplied with a dc current in the offhook state. ac speech signals in the receive and transmit directions are superimposed on this dc current. once the offhook state has been detected, the b-slic must supply a dc current to the subscriber line. the current is typically in the range of 14 to 40 ma, depending on local country specifications. conventional linecard solutions require additional hardware to adjust the dc feed current to meet different country specifications. by comparison, dc feeding with the b-muslic is fully programmable. '&&kdudfwhulvwlf transversal and longitudinal currents on the subscriber line are sensed by the b-slic and reported to the b-qap. the currents are separated, digitized, and fed to the digital dc characteristic of the b-mupp. the b-muslic dc-feed characteristic has 3 different zones: the constant-current zone, the resistive zone, and the constant-voltage zone. a programmable voltage reserve can be selected to avoid clipping the high ac signals (e.g. ttx). )ljxuh 6lpsolilhg'&ihhg&kdudfwhulvwlf &rqvwdqw&xuuhqw=rqh in the offhook state and under normal conditions, the feed current must be kept at a constant value, independent of load. b-slic measures the dc current, and supplies this i tip/ring i lim constant voltage zone programmable voltage reserve v res v bat v tip/ring resistive zone constant current zone
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 25 05.99 information to the b-qap via the it pin (input pin for dc control). the b-mupp compares the actual current with the programmed value, and adjusts the b-slic drivers as necessary. i tip/ring in the constant-current zone is programmable from 0 to 70 ma. 5hvlvwlyh=rqh the resistive zone is used for very long lines where the battery voltage is incapable of feeding a constant current to the line. in the b-muslic, the resistance is programmable from 0 to 1600 w . &rqvwdqwyrowdjh=rqh the constant-voltage zone is used in some applications to supply current through the line. in this case, v tip/ring is constant and the current depends on the load between the tip-and-ring pins. %rrvwhg%dwwhu\)hhg if the battery voltage is not sufficient to supply the minimum required current through the line even in the resistive zone, an auxiliary positive battery voltage, in addition to the negative battery voltage v bat , is used to expand the voltage swing between tip-and-ring (boosted battery mode). with this increased voltage range (v h to v bat ), it is possible to supply the constant current through very long lines. 3rzhu'lvvlsdwlrq power dissipation is a critical component of all system design. the b-muslic is optimized to minimize power dissipation while keeping overall systems cost low through the ivd approach. power dissipation in the b-muslic chipset depends upon a number of system parameters such as v bat , loop length. and operating mode. ( 7deoh ) * dependent on loop length 7deoh 3rzhu'lvvlsdwlrqp:shufkdqqhori%0x6/,&zlwk9%dwwhu\ 9rowdjh 2shudwlqj 0rgh %6/,& 9 %$7 9 %4$3 %0x33 $/l'' 7rwdo idle 10 60 15 50 135 data & voice 2517 300 25 300 3142 data only 2550 250 25 300 3125 voice only * 850 -2050 150 25 50 1075 - 2275
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 26 05.99 3urjudppdeoh3dudphwhuv 7deoh %0x6/,&3urjudppdeoh3dudphwhuv 3urjudppdelolw\ 5dqjh 6whsvl]h 8qlw &rpphqwv '&,qglfdwruv hook indication active 0 - 50 1.50 ma hysteresis 2ma line supervision 0 - 50 1.50 ma hysteresis 2ma ground key detection 0 - 50 1.50 ma high/low current threshold ring trip detection 0 - 50 1.50 ma hook indication power down 0 - 5 0.15 ma 5lqjlqj ringing frequency 0 - 80 2.00 hz ringing offset 0 - 50 1.50 v ringing amplitude: programmable range i programmable range ii 0 - 20 20 - 90 2.00 1.00 v rms v rms '&&kdudfwhulvwlfv constant current range 0 - 50 0.70 ma resistive range 0 - 1600 100.00 w external protection excluded corner voltage: programmable range i programmable range ii 0 - 60 60 - 120 1.50 3.00 v v constant voltage: programmable range i programmable range ii 0 - 60 60 - 120 1.50 3.00 v v 'herxqflqjfrxqwhu hook indication 1.0 - 16.0 1.00 ms the signal must be stable for the given period ground key detection 4.0 - 64.0 4.00 ms general io pins 1.0 - 16.0 1.00 ms
%0x6/,& )xqfwlrqdo'hvfulswlrq preliminary product overview 27 05.99 $&&kdudfwhulvwlfv impedance matching filters 1 real pole 1 real zero 1st order wdf, 4th order fir, digital gain factor, analog gain factor transhybrid filters 2 real poles 2 real zeroes, 2nd order wdf, 6th order fir, digital gain factor equalizers 4th order fir absolute gain -15 - +15 -30 - -15 +15 - +30 0.06 0.50 0.50 db db db 2 tone generators frequency 200 - 2k 40.00 hz amplitude -40 - 3.14 0.50 db 0hwhulqjvljqdov frequency 12/16 khz amplitude 0.5 - 2.5 0.10 vrms 1) worst case stepsize for respective programing range. 7deoh %0x6/,&3urjudppdeoh3dudphwhuv (contd) 3urjudppdelolw\ 5dqjh 6whsvl]h 8qlw &rpphqwv
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 28 05.99 2shudwlrqdo'hvfulswlrq the operational description contains a brief overview of the operation of the b-muslic chipset. the topics in this chapter are arranged as follows: ? 3 operational description ? 3.1 active with concurrent data and voice transmission ? 3.2 active-voice-only ? 3.3 ringing ? 3.4 power-saving modes ? 3.5 subscriber loop modes ? 3.6 line testing the b-muslic generates an internal reset at system power-up to begin initializing the chipset (figure 3-1). the local controller then downloads setup values to the registers of the b-mupp and the alidd, and places the b-muslic into power-down mode. power- down mode allows only essential loop monitoring activities in the b-slic to be operational. the local controller then proceeds to monitor the interrupt vectors of the b- muslic for loop activity, and respond appropriately for the type of signal and application . )ljxuh %0x6/,&6lpsolilhg0rgh'ldjudp power on hw reset reset (all channels) download alidd firmware and setup b-mupp registers power down all channels 'dwddqg9rlfh0rgh key active circuitry: - alidd - b-mupp - b-qap - b-slic dc, pots ac, and adsl-lite ac possible subscriber activity - adsl-lite data transmission - pots signaling - voice band ac transmission 9rlfh2qo\0rgh key active circuitry: - b-mupp - b-qap voice circuitry - b-slic dc, pots ac possible subscriber activity - pots signaling - voice band ac transmission
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 29 05.99 $fwlyhzlwk&rqfxuuhqw'dwddqg9rlfh7udqvplvvlrq while in the active data and voice mode, the b-muslic chipset can simultaneously respond to all pots signalling activity (ringing, hook status, etc.), send and receive voice band ac transmission, and operate a g.992.2-compliant adsl-lite modem. $ozd\vrq alidd supports the always-on state, meaning that there is no need to initiate a data connection manually whenever data traffic occurs. the g.lite data connection will stay active. different power modes (active, standby, power-down) can be used. )dvwuhwudlq alidd supports the fast-retrain mode. whenever line condition change (e.g., transition from onhook to offhook) for a longer period of time, the fast-retrain mode adapts the g.lite data connection to the new conditions in order to achieve higher performance and higher data throughput. $fwlyhyrlfhrqo\ the active-voice-only mode is designed for linecard operation where the subscriber is not supplied with an adsl-lite service. in this mode, the alidd and portions of the b- qap are powered down, the only functional block is the voice path. 5lqjlqj %dodqfhg5lqjlqj the ringing sine wave is generated in the b-mupp. the frequency and amplitude are programmable between 16 and 70 hz and up to 85 v rms at the tip-and-ring wires, respectively. the dc-offset voltage is programmable. when the ring-burst-on command is sent to the b-mupp, the start (ring-burst-on) and end (ring-pause) of the ring burst is automatically synchronized at the zero voltage crossing. if the dc current at the it pin exceeds the programmed value, offhook is detected within 2 periods of the ringing signal, and ring burst is switched off. when off-hook is detected, the b-muslic remains in the ring-pause mode. 8qedodqfhg5lqjlqj the ringing voltage is generated by an external ring generator and connected to the tip- and-ring line with an external relay. the b-muslic has integrated functionality to control the external ring relay with a zero voltage ring burst and ring trip signal.
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 30 05.99 3rzhuvdylqj0rghv in either power-down mode, power consumption is minimized by disabling all non- required functions. the b-muslic enters the power-down mode after a reset (including a power on reset) or by programming. if power-down is initiated via software, each separate channel can operate in a different mode. in power-down m ode, the b-muslics iom-2 or m c programming interface is ready to receive and transmit commands and data. the registers and coefficient ram can be loaded and read in this mode. received voice data on the pcm, iom-2, or utopia-2 interface will be ignored. there are 2 power-down options: ? 3'153rzhu'rz15hvlvwlyh this power-down mode places 5 k w resistors from tip-and-ring to battery ground (b gnd ) and the battery voltage (v bat ), respectively. these resistors allow loop activity monitoring with minimal circuitry for pots as well as remote modem requests. ? 3'1+3rzhu'rz1+ljklpshgdqfh this power-down mode provides a high impedance at tip-and-ring. if the pdnr mode has been selected, line supervision remains active. any change of line mode is reported via the hook bit in the iom-2 data upstream channel or the b-mupp m c scr8 register. to avoid spurious offhook information caused by longitudinal induction, the hook bit is low-pass filtered. an activate request from an adsl-lite modem issues an interrupt to the m c which has to start the activation of that specific adsl channel. 6xevfulehu/rrs0rghv signaling in the subscriber loop is supervised internally by the b-muslic chipset. supervision is performed by sensing the longitudinal and transverse line currents on the tip-and-ring wires. the scaled values of these currents are generated in the b-slic, and fed to the b-qap via the it and il pins. 2iikrrn'hwhfwlrq loop-start signaling is the most common type of signaling. the subscriber loop is closed by the hook switch inside the subscribers equipment. in active mode, the transversal loop current is sensed by the internal current sensor in the b-slic. the it pin of the b-slic indicates the loop current flow to the b-qap. an external resistor converts the current information to a voltage on the it pin. the analog information is first converted to a digital value. it is then filtered and processed to suppress line disturbances. if the result exceeds a programmable threshold, an interrupt is generated to indicate off-hook detection.
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 31 05.99 a similar mechanism is used in power-down mode. in this mode, the internal current sensor is switched off to minimize power consumption. the loop current is therefore fed and sensed through 5 k w resistors. the information is made available at the it pin and interpreted by the b-qap. 5lqjwuls'hwhfwlrq a common method for ring-trip detection is to add a dc voltage to the ringing signal and sense the transversal dc loop current. the b-slic automatically applies a programmable dc offset to its internally-generated balanced ringing signal. the dc voltage for ring-trip detection can be generated by the b-muslic chipset and the internal ring-trip function, even if an external ringing generator is present. *urxqgvwduw0rgh in applications using ground-start-loop signaling, the b-muslic can be set in the ground-start mode. in this mode, the tip wire is switched to high-impedance mode. ring- ground detection is performed by the internal current sensor in the b-slic, and transferred to the b-qap via the it pin. the input voltage to the b-qap is compared to a programmable threshold value. after further processing (for example, deglitching the status information from tip-and-ring wire through the use of a programmable persistency counter), this information generates an interrupt, and offhook detection is indicated. 7deoh %0x6/,&2shudwlqj0rghv 0rgh 6xe prgh 6/,&vxsso\ yrowdjhv 6\vwhp ixqfwlrqdolw\ $fwlyhflufxlwv 7lsdqgulqj yrowdjh power-down pdnh open / v bat none none high impedance pdnr open / v bat off-hook detect off-hook, dc transmit path 0 / v bat (via 5 k w ) active act-v 0 / v bat voice and/or ttx transmission ( no data ) buffer, sensor, dc+ ac loop, ttx generator (opt.) v bat / 2 1) act-d 0 / v bat data only or voice and data transmission buffer, sensor, dc+ ac loop, ttx generator (opt.) v bat / 2 bb v h / v bat voice and/or ttx transmission buffer, sensor, dc+ ac loop, ttx generator (opt.) (v h +v bat ) / 2 1) ground start v h / v bat voice and/or ttx transmission buffer, sensor, dc+ ac loop, ttx generator (opt.) ring:(v h +v bat ) / 2 1) tip: high impedance ring ring v h / v bat balanced ring signal feed (incl. dc offset) buffer, sensor, dc loop, ring generator (v h +v bat ) / 2 2)
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 32 05.99 special modes hirt v h / v bat e.g., sensor offset calibration sensor, dc transmit path high impedance hir v h / v bat e.g., line test (tip) tip buffer, sensor, dc transmit path tip: (v h +v bat ) / 2 1) ring: high impedance hit v h / v bat e.g., line test (ring) ring buffer, sensor, dc transmit path ring:(v h +v bat ) / 2 1) tip: high impedance 1) plus diff. ac and dc signals via ac and dc interface 2) plus diff. ring and dc signals via dc interface 7deoh %0x6/,&2shudwlqj0rghv 0rgh 6xe prgh 6/,&vxsso\ yrowdjhv 6\vwhp ixqfwlrqdolw\ $fwlyhflufxlwv 7lsdqgulqj yrowdjh
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 33 05.99 /lqh7hvwlqj ,qwurgxfwlrq subscriber loops are subject to many types of failure, and therefore have to be monitored. this requires easy access to the subscriber loop to perform regular measurements. line testing involves measuring resistance, leakage, and capacitance, and measurements of foreign currents and voltages. 7udglwlrqdo/lqh7hvwlqj conventional analog line cards in co applications usually include 3 to 4 relays per channel. one relay is normally required to switch an external ring generator to the line, and some applications need an additional relay for polarity reversal. two test relays are used to monitor the local loop (test-out relay) and to verify the line circuit itself (test-in relay). the test-out relay switches an external test unit to the subscriber line (figure 3-2). the external test unit measures capacitance, resistance, and leakage current, to detect any changes in the line condition or to detect any line failures. the test in relay makes it possible to switch a test impedance to the slic, and thereby separate the subscriber line from the slic. with a test tone, it is possible to check the entire linecard loop from the codec through the slic. )ljxuh 7udglwlrqdo/lqh7hvwlqj by offering integrated test features in silicon, the b-muslic chipset has the capability to do all these tests without the need for an additional external test unit. &2'(& &hqwudo7hvw8qlwiru doo$qdorj/lqhv &hqwudo /lqh7hvw5hodlv 1-3 relais test unit must detect status of a/b 6/,&
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 34 05.99 when testing lines with an external test unit, every line has to be connected separately to the test unit, and the tests have to be done line-by-line, which can take several hours for several thousand lines. due to the long measurement time, these tests are typically done once per week or once per month. therefore, any failures are usually detected very late. this drastically reduces the network quality for customers. the absolute error in accuracy of all these line tests is typically 5%-10% or more because the line parameters ( e , m , z) are usually unknown and can only be roughly estimated. ,7') ,qwhjudwhg 7hvw dqg 'ldjqrvwlf )xqfwlrqv zlwk wkh % 0x6/,& the b-muslic offers a variety of unique and flexible test features called itdf. itdf includes: ? integrated subscriber-line testing ? integrated codec self-diagnostics itdf reduces testing time, lowers manufacturing cost, accelerates the test flow in the field, and provides more flexibility for system manufacturers and their customers than conventional line testing does. all these features are provided rqvlolfrq without the need for any additional and expensive test equipment. with the b-muslic, usually only one relay is used for separating the line from the b-slic and for switching a test impedance to the b-slic. this test impedance can also be used for calibration. two integrated tone generators can be used to send test tones to the reference impedance. ? )ljxuh /lqh7hvwlqjzlwk,'7) ,qwhjudwhg 6xevfulehuolqh7hvwlqj integrated line testing functions make it possible to monitor the status of the subscriber loop remotely without any further test equipment. compared to traditional testing, all $''$ &rqyhuwhu &hqwudo2iilfh 0 or 1 relay %6/,& %0x33 ,7')
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 35 05.99 these tests can be done in parallel. this shortens the total test time for several thousand lines to several seconds. it is therefore possible to perform periodic tests on the subscriber loop, which means that the test time per line could be increased to several minutes, for example. line failures can be detected much earlier, making the network much more reliable. the b-muslic has integrated test functions to measure the following line values: C subscriber-loop resistance, e.g., to localize short circuits (0 to 10 k w ) (figure 3-4) C isolation measurement with boosted battery to detect leakage currents on the line, and to monitor line quality (10 k w to 5 m w ) C ringer capacitance C line capacitance (e.g., if the line breaks) (figure 3-5) C foreign currents the absolute error in accuracy is typically in the range of < 5 %, which is comparable to measurements with external test units. there are 2 important on-chip integrated test functions that formerly required external devices. the first is the b-muslics integrated ramp generator for testing ringer capacitance. the second is the ttx signal generator, whose primary function is to generate high frequency (up to 16 khz) metering pulses for billing purposes. it can also be used to measure the onboard capacitance when the subscriber line is disconnected. %dvlf0hdvxuhphqw3ulqflsoh line testing with the b-muslic is based on a voltage-feeding, current-sensing principle (figure 3-4). an incoming pcm word is converted to a voltage on the tip-and-ring line. the load on the line affects the current flowing into it. this current is sensed via the b- slic, and relevant information is fed to the codec where it is transferred as a pcm-out- word to the pcm highway. the dc-feed characteristic is switched off in the line-test mode.
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 36 05.99 )ljxuh 5hvlvwdqfh0hdvxuhphqw the same principle is also used for capacitance measurements (figure 3-5). the only difference is that for feeding the tip-and-ring line, no pcm-in-word is required, but the internal ramp generator can be used for producing a time-varying trapezoidal signal for capacitance measurements. . )ljxuh &dsdflwdqfh0hdvxuhphqw the current on the tip-and-ring line is proportional to the derivative of the feed voltage. the capacitance can be calculated directly by measuring the peak current and the programmed feed voltage (figure 3-6): b-slic channel a b-mupp/ b-qap pcm out pcm in 1k5 1k5 dcpa it il itac-a il-a it-a dcna dcp dcn ring generator r loop i loop 880n b-slic channel a b-mupp/ b-qap pcm out pcm in dcpa i loop dcna dcp dcn ring generator 1k5 1k5 it il itac-a il-a it-a 880n
%0x6/,& 2shudwlrqdo'hvfulswlrq preliminary product overview 37 05.99 )ljxuh &dsdflwdqfh&dofxodwlrq ,qwhjudwhgfrghf6hoigldjqrvlv the integrated codec self-diagnostic features can be used to perform a functional in- spection of a complete analog linecard at the end of the manufacturing process. this method has 2 important benefits. test time is drastically reduced, and no additional, ex- pensive test equipment is required except for 1 reference resistor with relays. the exter- nal resistor and relay serve as an external reference. the b-muslic has integrated test functions to measure the following codec values: ? various analog and digital loops to test the analog and digital interfaces of the linecard ? digital loop to test interface to codec (e.g. backplane) ? digital loop for codec self-diagnosis ? various analog loops to test the codec in production ? level-metering to test ring voltage, metering pulses, voice levels, and noise (s/n). ? automatic internal alidd diagnostics and self-test. 8ulqj , & g8gw
%0x6/,& ,qwhuidfhv preliminary product overview 38 05.99 ,qwhuidfhv the b-muslic chip set has several interfaces. the b-mupp is controlled through either an iom-2 interface, or a parallel m c interface. voice data is sent to/from the b-mupp in the iom-2 structure or though a pcm interface. the alidd is also controlled with a parallel m c interface, and data is sent though a utopia-2 interface with 8-bit data. the topics in this chapter are arranged as follows: ? 4.1 pcm interface ? 4.2 iom-2 interface ? 4.3 utopia-2 interface ? 4.4 b-mupp 8-bit microcontroller interface ? 4.5 alidd 8/16-bit microcontroller interface ? 4.6 tip-and-ring interface 3&0,qwhuidfh two serial pcm highways are used to transfer voice data. a pcm interface consists of 8 pins: the frame-sync clock (fsc) pulse identifies the beginning of a receive and transmit frame for all 8 channels. the pclk synchronizes data transfer on both lines dxa (dxb) and dra (drb) to the pcm highways. bytes in all channels are serialized to 8-bit width with the msb first. the data rate of the interface can vary from 2*512 kb/s to 2*8192 kb/s (two highways). 7deoh shows sample frequencies for the pcm interface. pclk: pcm clock, 512 khz to 8192 khz fsc: frame synchronization clock, 8 khz dra: receive data input for pcm highway a drb: receive data input for pcm highway b dxa: transmit data output for pcm highway a dxb: transmit data output for pcm highway b tca: transmit control output for pcm highway a, active low during transmission tcb: transmit control output for pcm highway b, active low during transmission
%0x6/,& ,qwhuidfhv preliminary product overview 39 05.99 ? ,20,qwhuidfh the iom-2 interface consists of 2 data lines and 2 clock lines. data upstream (du) carries data from the b-muslic to a master device. data downstream (dd) carries data from the master device to the b-muslic. an 8-khz fsc signal and a 4096-khz data clock (dcl) signal have to be supplied to the b-muslic. the b-muslic handles data as described in the iom-2 1) specification for analog devices. 8wrsld,qwhuidfh the alidd supports a complete 8-bit utopia-2 interface as defined by atm forum document utopia level 2, version 1.0 . the table below describes the pins used to implement the utopia-2 interface on the alidd. the utopia-2 interface allows up to 31 physical layer devices on a single interface. using a proprietary in-band signaling protocol, infineon has added a feature to the standard utopia-2 interface. this feature allows connections for up to 124 physical layer devices. 7deoh %0x6/,&3&0,qwhuidfh&rqiljxudwlrq )uhtxhqf\ >n+]@ 6lqjoh'rxeoh >@ 7lph6orwv >shukljkzd\@ 'dwd5dwh >nelwvshukljkzd\@ 512 1 8 512 1024 2 8 512 1024 1 16 1024 2048 2 16 1024 2048 1 32 2048 4096 2 32 2048 4096 1 64 4096 8192 2 64 4096 8192 1 128 8192 1) available on request from your local infineon office u_rxdata [1:8]: utopia data receive u_txdata [1:8]: utopia data transmit u_rxaddr [1:5]: utopia address receive u_txaddr [1:5]: utopia address transmit
%0x6/,& ,qwhuidfhv preliminary product overview 40 05.99 %0x33elw0lfurfrqwuroohu,qwhuidfh this parallel m c interface is used to communicate with external master devices such as linecard controllers. the b-mupp m c interface consists of 6 control lines (ale/ds , cs , rd /rw, wr , demux/mux , int /mot), 8 bidirectional address/data lines (dio0 to dio7), and 8 address lines (a0 to a7). the interface provides fast parallel data transfer to a m c (intel- and motorola-compatible). it supports a multiplexed/non-multiplexed 8-bit address/data bus, and connects to m cs of the intel 8051-(mcs51/251-), siemens c16x and motorola m68hcxx or m683xx families. the following interface specifications can be selected using pin strapping: ? intel multiplexed mode ? intel demultiplexed mode ? motorola mode u_rxclav [0:3]: receive interface cell available u_txclav[0:3]: transmit interface cell available u_rxenb: receive enable u_txenb: transmit enable u_rxsoc receive interface start of cell indication u_txsoc transmit interface start of cell indication u_rxclk receive interface utopia clock u_txclk transmit interface utopia clock rx_data receive data within serial bypass mode (atu to tc logic interface according to g.992.2, if no atm is used as high-layer protocol) sbp_clk serial bypass clock 7deoh $gguhvv/d\rxwriwkh m &,qwhuidfhv3&00rgh $gguhvv &rppdqg )xqfwlrq 00000000, 00 h channel preselect channel for channel- specific commands bsop, sop, top, copi 00000001, 01 h status status register to control the read/ write operations 00000010, 02 h interrupt register (read only) indicates channel and sources of pending interrupts 00000011, 03 h reset reset the m c interface by writing 0aa h data to this address
%0x6/,& ,qwhuidfhv preliminary product overview 41 05.99 $/l''elw0lfurfrqwuroohu,qwhuidfh the parallel interface of the alidd is similar to the one in the b-mupp (section 4.4), but also offers a mode with a 16-bit-wide data bus (dio0 to dio15). after power-up, the alidd m c interface is in 8-bit mode and can be configured to 16-bit mode via a control register. the communication between alidd and the m c uses a mailbox interface with 2 mailboxes (send and receive), each 512x16 bits ( 7deoh ). for communication from m c to alidd, e.g., a write operation, a byte or word of data has to be written to the data register. then the address has to be written to the write address register. if additional data has to be sent, the address register is incremented automatically so that only further data writes are necessary. a read operation is performed similarly, but uses different registers. the configuration register makes it possible to configure pll, 8/16-bit host interface, and reset. the alidd provides three types of m p buses that are selected via pin ale.t 00000100, 04 h reserved 00000101, 05 h interrupt channel register 1 indicate pending interrupts on channels 0 to 7 00000110, 06 h reserved 00000111, 07 h data data port for all register read/write operations 7deoh 5hjlvwhuvlq$/l''0dloer[iru+rvw$ffhvv $gguhvv &rppdqg)xqfwlrq 00000000, 00 h read: mailbox input data from alidd write: mailbox output data to alidd 00000001, 01 h write: mailbox address for write to alidd[9:2] 00000010, 02 h write: mailbox address for write to alidd[1:0] 00000011, 03 h write: mailbox address for read from alidd[9:2] 00000100, 04 h write: mailbox address for read from alidd[1:0] 00000101, 05 h read: host interrupt acknowledged by alidd write: host status to alidd 00000110, 06 h read: alidd status register 00000111, 07 h read/write: configuration register 7deoh $gguhvv/d\rxwriwkh m &,qwhuidfhv3&00rgh
%0x6/,& ,qwhuidfhv preliminary product overview 42 05.99 +rvw,qwhuidfh6ljqdov 7deoh +rvw,qwhuidfh2shudwlqj0rghv multiplexed a/d demultiplexed a/d 8 bit addr: ad(0:7) data: ad(0:7) addr: a(0:7) data: ad(0:7) 16 bit addr: ad(0:7) data: ad(0:15) addr: a(0:7) data: ad(0:7 7deoh +rvw,qwhuidfh6ljqdov 6\pero ,qsxw, 2xwsxw2 )xqfwlrq ad(0:7)/ (0:15) d(0:15) i/o $gguhvv'dwd%xvpxowlsoh[hgprgh transfers addresses and data between the host and the alidd. 'dwd%xvqrqpxowlsoh[hgprgh transfers data between the host and the alidd. a(0:7) i $gguhvv%xvqrqpxowlsoh[hgprgh input address to the alidd registers. rd ds i 5hdg6lhphqv,qwhoexvprgh this signal indicates a read operation. 'dwd6wureh0rwrurodexvprgh the rising edge marks the end of a valid read or write operation. wr r/w i :ulwh6lhphqv,qwhoexvprgh this signal indicates a write operation. 5hdg:ulwh0rwrurodexvprgh a "1" identifies a valid host access as a read operation and a "0" identifies it as a write operation. cs i &kls6hohfw a "0" on this line selects the alidd for a read/write operation.
%0x6/,& ,qwhuidfhv preliminary product overview 43 05.99 7lsdqgulqj,qwhuidfh the tip-and-ring interface connects the subscriber line to the b- muslic. the interface meets the itu-t recommendation q.552 for a z-interface. ale i $gguhvv/dwfk(qdeoh a 1 on this line indicates an address on ad (0:7), that is latched by the alidd (multiplexed mode only). ale also selects the interface mode (multiplexed or non- multiplexed). int o (od) ,qwhuuxsw5htxhvw this is the interrupt output line to the host for all mailbox interrupt status requests. it is an open drain output. 7deoh +rvw,qwhuidfh6ljqdov 6\pero ,qsxw, 2xwsxw2 )xqfwlrq
%0x6/,& $ssolfdwlrq&lufxlwdqg7rrov preliminary product overview 44 05.99 $ssolfdwlrq&lufxlwdqg7rrov the topics in this chapter are: ? 5.1 typical application circuit (figure 5-1) ? 5.2 support tools 7\slfdo$ssolfdwlrq&lufxlw ? )ljxuh $ssolfdwlrq&lufxlw 6xssruw7rrov ? b-muslicos coefficient calculating software ? smart35508 b-muslic evaluation board ? smart55504 alidd evaluation board %0x6/,&26&rhiilflhqw&dofxodwlqj6riwzduh the b-muslicos coefficient calculating software is a project-oriented, windows- compatible program. it is designed to assist the user in developing sets of dsp filter coefficients for different country and ptt requirements. the on-line help and structured program flow guide the user through the coefficient calculation process. reset adcl afsc add adu io1 io2 io3 io4 id0 id1 id2 id3 a0 : a3 dio0 : dio7 csq ale wrq rdq intr muxq intq/mot fsc mclk tc1 dr1/dd1 dx1/du1 pclk tc2 dr2 dx2 %0x33 3(% v dd v dd5 itdp-a il-a acp-a acn-a dcp-a dcn-a c1-a c2-a io1-a io2-a i1-a o1-a reset adcl afsc add adu %4$3 3(% v dd-a v ddi v ss v a v b v bim v ddz v ddp1,2 ? & , q w h u i d f h 3 & 0 + l j k z d \ $ 3 & 0 + l j k z d \ % v h +5v -5v v bat agnd dgnd agnd v cca v ccd -5v 100n 100n 100n dgnd +3,3v dgnd +3,3v dgnd v ccd reset 4x680k w dgnd dgnd dgnd vss gndi rref gnd-a gndz dgnd agnd 3x680k w agnd agnd 120n 120n agnd 2.2k w 1,5k w itd il acp acn dcp dcn c1 c2 tipc tip ring ringc bgnd agnd cext agnd agnd bgnd 470n 22 100n 100n 100n v ccd 22 dgnd 2k w 1f 1f 1f agnd itdn-a it-a itac-a vr-a ddu0/1 ddd0/1 agnd c3-a %6/,& 3(% v h v dd v ss v bat 3x100n bgnd v h v bat +5v -5v 2x1 agnd 30 w 20 w 250p bgnd 30 w 20 w 250p bgnd protection circuit itv dfsc dcx01 dcx02 $/l'' 3(% ddd0/1 ddu0/1 adcl u_rxdata 0:7 u_txdata 0:7 u_rxaddr 0:4 u_txaddr 0:4 u_rxclav 0:3 u_txclav 0:3 u_rxenbb u_txembb u_txsoc u_rxsoc u_rxclk u_txclk rxdata sbp_clk gpio's h_dat 0:15 h_adr 0:7 h_wr h_rd h_int h_cs h_ale xtal1 xtal2 clko reset testmode dgnd agnd dgnd +3,3v 100n dgnd +2,5v 100n v ddp v dd agnd +2,5v v dda agnd +2,5v v ddap 100n 100n
%0x6/,& $ssolfdwlrq&lufxlwdqg7rrov preliminary product overview 45 05.99 b-muslicos calculates coefficients for the following filters. ? ac filters C impedance matching to adapt the system to the required line impedance of the local loop (return-loss calculation) C frequency response correction for both receive and transmit paths C level adjustment for both receive and transmit paths C transhybrid balancing C 2 programmable tone generators. ? dc filters C dc-feed characteristic (battery-feed characteristic values such as constant current, resistive range, and constant range) C ringing signal C level metering C ttx signals C threshold calculation for offhook and onhook. after defining the required inputs for b-muslicos, the user can start calculating the filter coefficients. all calculation results are stored in the result file, which can be displayed by the b-muslicos program. some of the calculations are also displayed graphically to enable the product designer to verify the required behavior quickly, and make any additional optimizations manually. the following calculations are displayed graphically: ? return loss ? input impedance ? frequency responses in the receive and transmit paths ? transhybrid loss ? dc characteristic 60$57dqg60$577rro3dfndjhv the smart 35508 and smart 55504 tool packages include an evaluation board and intuitive windows-based software enabling simple configuration and programming of the b-muslic data and voice functions. each evaluation tool gives complete access to all data and voice interfaces, facilitating complete system performance measurements. either evaluation system can be connected to test equipment in order to measure the transfer characteristics and to fine-tune system performance.
%0x6/,& 3dfndjh2xwolqhv preliminary product overview 46 05.99 3dfndjh2xwolqhv 3'62 (plastic metric quad flat package)
%0x6/,& 3dfndjh2xwolqhv preliminary product overview 47 05.99 304)3 (plastic metric quad flat package) gpm05249
%0x6/,& 3dfndjh2xwolqhv preliminary product overview 48 05.99 ? 374)3 (plastic thin quad flat package)
%0x6/,& 3dfndjh2xwolqhv preliminary product overview 49 05.99 ? ? ? 304)3 (plastic metric quad flat package) 6ruwvri3dfnlqj package outlines for tubes, trays etc. are contained in our data book package information. dimensions in mm smd = surface mounted device 3dfndjlqj package outlines for tubes, trays etc. are described in our data book package information. dimensions in mm smd = surface-mounted device
%0x6/,& 3dfndjh2xwolqhv preliminary product overview 50 05.99 $eeuhyldwlrqvdqg$furq\pv ahv-slic advanced high-voltage slic bb boosted battery borscht battery feeding, overvoltage protection, ringing, signaling (supervision), coding, hybrid for 2/4-wire conversion, testing co central office cop coefficient operation command copi coefficient operation initialize dcl data clock signal dd data downstream dra (b) receive data input for pcm highway a (b) dsp digital signal processor dtag deutsche telecom ag dtmf dual tone multi frequency du data upstream dxa (b) transmit data for pcm highway a (b) fsc frame synchronization clock iom isdn-oriented module iom ci iom control interface itdf integrated test and diagnostic functions lssgr local area transport access switching system generic requirements m c microcontroller msb most significant bit b-mupp broadband multichannel processor for pots b-muslic broadband multichannel signal-processing subscriber-line interface circuit pbx private branch exchange pclk pcm clock pcm pulse code modulation pots plain old telephone system pstn public switched telephone network
%0x6/,& 3dfndjh2xwolqhv preliminary product overview 51 05.99 b-qap broadband quad analog frontend processor b-slic broadband subscriber line interface circuit smd surface-mounted device sop status operation tca (b) transmit control output for pcm highway a (b) tg tone generator top transfer operation ttx teletax

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