data brief for further information contact your local stmicroelectronics sales office. rev 1 october 2005 1/5 5 STA400A xmradio ? sdars channel decoder features: front end interface two internal 10 bit a/d converters two qpsk demodulators for satellite branch one multicarrier demodulator for terrestrial branch satellite symbol frequency: 1.64 mbaud terrestrial symbol frequency: 2.99 mbaud digital root raised cosine nyquist filter: 15% roll-off fft length: 768 sub-carriers full digital carrier and frequency recovery and tracking loops frequency inversion compensation for high- side/low-side mixer injection lock detectors, c/n indicator, on chip ber estimators two digital agcs: internal signal power estimation and filtering 1 bit pdm agcs control signal outputs tdm decoding and management satellite and terrestrial frame synchronization satellite phase ambiguity resolution tdm demultiplexing prime rate channel (prc) demultiplexing external memory controlling forward error correction viterbi decoder: k=7, r=1/3 satellite depuncturing: rate 3/4 terrestrial depuncturing: rate 3/5 convolutional time deinterleaver over 4.7 sec block deinterleaver over 2 rs blocks reed-solomon decoder: (255,223). up to 16 bytes correction capability. energy dispersal descrambler sat-sat and terr-sat diversity combining back end interface two payload channel bitstream interfaces payload channel selection logic designed to work with the sta450a service and source decoder low power technology 1.8v, 0.18 m technology 3.3v capable i/os control iic-bus slave control interface device address: 1101010 order codes tqfp144 part number temp range, c package packing STA400A -40 to +85 tqfp144 tube STA400A13tr -40 to +85 tqfp144 tape & reel www.st.com obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
1 description STA400A 2/5 1 description the sdars is a satellite transmission system based on two geostationary satellites on the east and west coasts of the continental united states (conus). in the urban areas, where the line of sight reception of the satellites is difficult or not possible, the service is covered by terrestrial repeaters adopting a multicarrier modulation scheme. designed for digital radio receivers compatible with the xmradio sdars system, the STA400A channel decoder integrates all the functions to demodulate and decode the incoming satellite and terrestrial signals after the rf front-end down-convertions: analog-to-digital conversions, satellite and terrestrial demodulations, agcs, frame synchronization and demultiplexing, viterbi decoding, time and spatial diversity combining, reed-solomon decoding and deinterleaving, prime rate channel (prc) demultiplexing, payload channel (pc) selection. at the end of the demodulation and decoding processes a configurable serial data stream is made available to sta450a, the service/source decoder, via the pc bitstream interface figure 1. channel decoder block diagram if2ta_p if2ta_n if2td[9:0] tagc if2sa_p if2sa_n if2sd[7:0] sagc adcsel terr.tdm synch. and descrambling sat2 tdm synch. and descrambling fifo fifo sat1&2 weighting factor calculation fifo mdq[7:0] madd[11:0] tdm decoding tdm management fec pcbs1 pcdc1 pcfs1 pcts_ef1 pcsd1 mreset xto xti/mclk intr scl sda mclko mclkon fifo pcbs2 pcdc2 pcfs2 pcts_ef2 pcsd2 sat1 tdm synch. and descrambling lock_s2 lock_s1 terr agc 10 bit adc 8 bit adc sat agc terrestrial multi carrier demodulator satellite 1 qpsk demodulator satellite 2 qpsk demodulator external memory controller tdm demux terr.fifo ber meas. sat.fifo sat/sat weighting & combining depuncturing viterbi decoder terr./sat. combining rs decoder microprocessor interface pc bitstream interface #2 pc bitstream interface #1 trefm trefp tadcref tincm tvcmo srefm srefp sadcref sincm svcmo mao1 mai1 mao2 mdqm mwe cas ras mcs1 mcs0 mcke mbs1 mbs0 prc demux controller mfp_clk clkd test_en scan_en bist_en ftesten ftestout[15:0] lock_m test interface clock distribution pc port #2 pc port #1 obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
STA400A 2 package information 3/5 2 package information figure 2. tqfp144 mechanical data & package dimensions outline and mechanical data dim. mm inch min. typ. max. min. typ. max. a 1.60 0.063 a1 0.05 0.15 0.002 0.006 a2 1.35 1.40 1.45 0.053 0.055 0.057 b 0.17 0.22 0.27 0.007 0.009 0.011 c 0.09 0.20 0.003 0.008 d 22.00 0.866 d1 20.00 0.787 d3 17.50 0.689 e 0.50 0.020 e 22.00 0.866 e1 20.00 0.787 e3 17.50 0.689 l 0.45 0.60 0.75 0.018 0.024 0.030 l1 1.00 0.0393 k 3.5? (min.), 7?(max.) tqfp144 (20x20x1.40mm) 0099183 b note 1: exact shape of each corner is optional. obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
3 revision history STA400A 4/5 3 revision history date revision changes 10-oct-2005 1 initial release. obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
STA400A 5/5 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners ? 2005 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com obsolete product(s) - obsolete product(s) obsolete product(s) - obsolete product(s)
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