ame, inc. rev.a.01 1 at123s pci arbiter l pci arbiter extend pci devices from one to three l pci clock frequency support pci clock range from 25mhz to 66mhz at123s is a pci arbiter. it allows users to extend sys- tem pci devices or slots without piecing additional cir- cuit to simply design complexity and increase system stability. at123s also provides stop# input pin with that extended pci devices is able to instruct the pci master to prematurely end the transaction on the current data phase same as one defined in pci specification. n general description n features l all ame' s lead free products meet rohs standards sysreq # 1 16 stop# sysgnt # 2 15 vcc pcireq1# 3 14 pciclki vss 4 13 pcireset# pcignt1# 5 12 vss pcireq2# 6 11 vcc vcc 7 10 pcignt3# pcignt2# 8 9 pcireq3# a t 1 2 3 s n pin configuration ? ordering information at 123s - commercial standard AT123SG - green device with commercial standar d
ame, inc. 2 rev.a.01 pci arbiter at123s n pin description pin no. pin name i/o type function 1 sysreq# pp 12 request signal to chipset 2 sysgnt# in t grant signal from chipset 3 pcireq1# in t request signal from pci bus (internal 5k pull-up resistor) 5 pcignt1# pp 12 grant signal to pci bus 6 pcireq2# in t request signal from pci bus (internal 5k pull-up resistor) 8 pcignt2# pp 12 grant signal to pci bus 9 pcireq3# in t request signal from pci bus (internal 5k pull-up resistor) 10 pcignt3# pp 12 grant signal to pci bus 13 pcireset# in t pci bus reset# 14 pciclki in t pciclk input reference frequency 16 stop# in t pci bus stop# 4 vss pwr ground 7 vcc pwr 3.3v power 11 vcc pwr 3.3v power 12 vss pwr ground 15 vcc pwr 3.3v power table 1. pci arbiter fsm group signal i/o type function in t ttl level input pp 12 push pull output with 12ma sink current pwr power pin
ame, inc. rev.a.01 3 at123s pci arbiter n quick reference data symbol parameter test conditions min typical max unit 3.15 3.3 3.45 vss ground pin 0 v vcc power pin v table 2. power/ground pin symbol parameter test conditions min typical max unit vil input low voltage 0.8 v vih input high voltage 2 v vol output low voltage 0.4 v voh output high voltage 2.4 ns pciclki buffer input frequency 2 5m 6 6m hz tdcko 8 ns output delay from pciclk rising edge to output valid 10 table 3. pci arbiter fsm gnd = 0v; vcc = 3.3v; 0 o c < temp. < 85 o c
ame, inc. 4 rev.a.01 pci arbiter at123s n package dimension sop-16 min max min max a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.004 0.010 b c e e 3.81 4.00 0.150 0.157 d 9.80 10.00 0.386 0.394 h h 5.80 6.20 0.228 0.244 l 0.41 1.27 0.016 0.050 q 0 o 8 o 0 o 8 o 0.38typ 0.015typ 0.40typ 0.018typ 0.20typ 0.008typ 1.27typ 0.050typ symbols millimeters inches b e e h 1 8 9 16 top view d a 1 a seating plane 0.004 max front view h c side view a" l detal : a" 0'
life support policy: these products of ame, inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of ame, inc. ame, inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. ? ame, inc. , july 2007 document: att-dsat123s-a.01 corporate headquarter u.s.a. (subsidiary) ame, inc. analog microelectronics, inc. 2f, 302 rui-guang road, nei-hu district 3100 de la cruz blvd., suite 201 taipei 114, taiwan. santa clara, ca. 95054-2046 tel : 886 2 2627-8687 tel: (408) 988-2388 fax: 886 2 2659-2989 fax: (408) 988-2489 www.ame.com.tw e-mail: sales@ame.com.tw
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