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IT8208M extended pci arbiter preliminary specification v0. 3 http://www..net/ datasheet pdf - http://www..net/
copyright ? 2002 ite, inc. this is preliminary document release. all specifications are subject to change without notice. the materi al contained in this document supersedes all previous documentation issued for the related products included herein. please contact ite, inc. for the latest document(s). all sales are subject to ite?s standard terms and conditions, a copy of which is inclu ded in the back of this document. ite, IT8208M is a trademark of ite, inc. all other trademarks are claimed by their respective owners. all specifications are subject to change without notice. additional copies of this manual or other ite literature may be obtained from: ite, inc. phone: (02) 2912 - 6889 marketing department fax: (02) 2910 - 2551 , 2 910 - 2552 8f, no. 233 - 1, bao chiao rd., hsin tien, taipei county 231 , tai wan, r.o.c. ite (usa) inc. phone: (408) 530 - 8860 marketing department fax: (408) 530 - 8861 1235 midas way sunnyvale, ca 94086 u.s.a. ite (usa) inc. phone: (512) 388 - 7880 eastern u.s.a. sales office fax: (512) 388 - 3108 896 su mmit st., #105 round rock, tx 78664 u.s.a. if you have any marketing or sales questions, please contact: lawrence liu, at ite taiwan: e - mail: lawrence.liu@ite.com.tw , tel: 886 - 2 - 2912 - 6889 x6071, f ax: 886 - 2 - 26578561 david lin , at ite u.s.a: e - mail: david.lin@iteusa.com , tel: (408) 530 - 8860 x238, fax: (408) 530 - 8861 don gardenhire , at ite eastern usa office: e - mail: don.gardenhire@iteusa.com tel: (512) 388 - 7880, fax: (512) 388 - 3108 to find out more about ite, visit our world wide web at: http://www.ite.com.tw http://www.iteusa.com or e - mail itesupport@ite.com.tw f or more product information/services. http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com 1 revision history revision history section revision page no. 6 the max. value of v il in section 6 dc characteristics was revised to ?vcc x 0.3 ?. the max. value of v ih has been removed. 11 http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com i contents contents 1. features ................................ ................................ ................................ ................................ ................................ 1 2. general description ................................ ................................ ................................ ................................ ............. 3 3. block diagram ................................ ................................ ................................ ................................ ...................... 5 4. pin configuration ................................ ................................ ................................ ................................ .................. 7 5. IT8208M pin descriptions ................................ ................................ ................................ ................................ ... 9 6. dc charac teristics (vcc = 3.3v 0.3v. ta=0 c to 70 c) ................................ ................................ ............... 11 7. ac characteristics ................................ ................................ ................................ ................................ ............. 13 8. package information ................................ ................................ ................................ ................................ .......... 15 9. ordering information ................................ ................................ ................................ ................................ .......... 17 figures figure 2 - 1. arbitration scheme of IT8208M ................................ ................................ ................................ ............. 3 figure 3 - 1. extended pci arbiter scheme ................................ ................................ ................................ ............... 5 figure 7 - 1. pci request delay timing ................................ ................................ ................................ .................. 13 figure 7 - 2. pci grant delay timing ................................ ................................ ................................ ....................... 13 figure 7 - 3 . pci grant separat ion timing ................................ ................................ ................................ .............. 13 tables table 4 - 1. pins listed in numeric order ................................ ................................ ................................ .................. 7 table 5 - 1 . pin descriptions of extended pci arbiter ................................ ................................ .............................. 9 table 5 - 2 . pin descriptions of pci bus clock ................................ ................................ ................................ ......... 9 table 5 - 3 . pin descriptions of power/ground signals ................................ ................................ ............................ 9 table 7 - 1. pci request delay timing table ................................ ................................ ................................ ......... 13 table 7 - 2 . pci grant delay timing table ................................ ................................ ................................ .............. 13 tab le 7 - 3 . pci grant separatiion timing table ................................ ................................ ................................ .... 13 http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com itpm - pn - 200 204 specifications subject to ch ange without notice peterson lu, mar. 0 7 , 2002 1 features 1. features n extended pci arbiter - supports 1 pci arbiter to extend 1 set of sysgnt # and sys req#, which can be utilized to support 3 pci masters n input pci clock - supports input clock fre quency from 25mhz to 66mhz n 16 - pin sop http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com 2 http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com 3 general description 2. general description the IT8208M incorporates an extended pci arbiter to support more pci master bus request. the extended pci arbiter utilizes one set of sysgnt # and sys req# to support 3 pci masters , so that two more pci masters can be supported for the system. pcistop# input signal is useful to facilitate the fairness arbitration. the algorithm of this arbiter uses a rotation arbitration priority that is illustrated in figure 2 - 1 . the pci bus clock can support frequency from 25 mhz to 66 mhz. the IT8208M is available in 16 sop package. figure 2 - 1 . arbitration scheme of IT8208M extended device 1 extended device 3 extended device 2 pci device n pci device x pci device n-1 pci device 1 pci device 2 central pci arbiter (chipset) extended pci arbiter (IT8208M) http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com 4 http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com 5 block diagram 3. block diagram figure 3 - 1 . extended pci arbiter scheme pci bus IT8208M sysreq# sysgnt# pcireq1# pcignt1# pcireq2# pcignt2# pcireq3# pcignt3# pci master 1 pci master 2 pci master 3 http://www..net/ datasheet pdf - http://www..net/
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www.ite.com.tw IT8208M v0. 3 www.iteusa.com 7 pin configuration 4. pin configuration 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 IT8208M sysreq# sysgnt# pcireq1# vss pcignt1# pcireq2# pcistop# pciclki pcirst# vss pcireq3# vcc pcignt2# pcignt3# vcc vcc pin signal pin signal 1 sysreq# 9 pcireq3# 2 sysgnt# 10 pcignt3# 3 pcireq1# 11 vcc 4 vss 12 vss 5 pcignt1# 13 pcirs t# 6 pcireq2# 14 pciclki 7 vcc 15 vcc 8 pcignt2# 16 pcistop# table 4 - 1 . pins listed in numeric order http://www..net/ datasheet pdf - http://www..net/
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www.ite.com.tw IT8208M v0. 3 www.iteusa.com 9 IT8208M pin descriptions 5. IT8208M pin descriptions table 5 - 1 . pin description s of extended pci arbiter signal pin(s) no. attribute description extended pci arbiter signals (3.3v cmos i/f, 5v tolerant) pcistop# 16 piu pci bus stop# signal sysreq# 1 o12 pci bus request sysgnt# 2 piu pci bus grant pcireq1# 3 piu request signal fr om extended pci master 1 pcignt1# 5 o12 grant signal to extended pci master 1 pcireq2# 6 piu request signal from extended pci master 2 pcignt2# 8 o12 grant signal to extended pci master 2 pcireq3# 9 piu request signal from extended pci master 3 pcignt 3# 10 o12 grant signal to extended pci master 3 pcirst# 13 ik pci bus rst# signal table 5 - 2 . pin descriptions of pci bus clock signal pin(s) no. attribute description pci bus clock signals (3.3v cmos i/f) pciclki 14 i pciclk input table 5 - 2 . pin descriptions of power/ground signals signal pin(s) no. attribute description power ground signals vss 4, 12 i ground vcc 11, 15 i power supply of 3.3v notes: io cell types are described as below: i: input pad. ik: schmitt trigger input pad. piu: pci bus specified input pad (integrated a 75k ohms pull - up resistor). o12: 12ma output pad. http://www..net/ datasheet pdf - http://www..net/
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www.ite.com.tw IT8208M v0. 3 www.iteusa.com 11 dc characteristics 6. dc characteristics (vcc = 3.3v 0.3v. ta=0 c to 70 c) absolute maximum rating s* applied voltage of vcc, avcc ............. - 0.3v to +4.6v input voltage of 3.3v interface ...... - 0.3v to vcc+0.3v input voltage of 5v tolerant interface ... - 0.3v to 5.25v tcase ................................ ......................... 0 c to +70 c storage temperature ......................... - 40 c to +125 c dc electrical characteristics (ta = 0 c to 70 c) symbol parameter min. typ. max. conditions v il input low voltage - 0.3v vcc x 0. 3 vcc=3.0 ~ 3.6v v ih input high voltage vcc x 0.7 vcc=3.0 ~ 3.6v v ol output low voltage 0.5 i ol = - 12ma v oh output high voltage 2.4 i oh = 12ma i il in put low current - 1 m a 1 m a v il = v ss no pull - up or pull - down i ih input high current - 1 m a 1 m a v ih = vcc no pull - up or pull - down i oz tri - state leakage current - 10 m a 10 m a cin input capacitance 3pf cout output capacitance 3pf cbld bi - directional buf fer 3pf r i input pull - up resistance 40k w 75k w 170k w v il =0v *comments stresses above those listed under "absolute maximum ratings" may cause permanent damage to this device. these are stress ratings only. functional operation of this device at these or any other conditio ns above those indicated in the operational sections of this specification is not implied, and exposure to absolute maximum rating conditions for extended periods may affect device reliability. http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com 12 http://www..net/ datasheet pdf - http://www..net/
www.ite.com.tw IT8208M v0. 3 www.iteusa.com 13 ac characteristics 7. ac characteristics figure 7 - 1 . pci request delay timing table 7 - 1 . pci request d elay timing table symbol parameter min. typ. max. unit t 1 pcireqn# (n=1, 2, 3) to sysreq# asserted 0 - 7 ns figure 7 - 2 . pci grant delay timing table 7 - 2 . pci grant de lay timing table symbol parameter min. typ. max. unit t 2 sysgnt# to pcigntn# (n=1, 2, 3) asserted 0 - 8.5 ns figure 7 - 3 . pci grant separation timing table 7 - 3 . pci grant separati on timing table symbol parameter min. typ. max. unit t 3 pcigntm# (m=1, 2, 3) deasserted to pcigntn# (n=1, 2, 3) asserted (n 1 m) 1 - - clock period sysgnt# pcigntn# t 2 pcigntm# pcigntn# t3 pcireqn# sysreq# t1 http://www..net/ datasheet pdf - http://www..net/
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www.ite.com.tw IT8208M v0. 3 www.iteusa.com 15 package information 8. package information sop16l outline dimensions unit: inches/mm l l 1 c see detail f detail f a 1 a 2 a d seating plane e d y 1 e h e 8 9 16 b dime nsion in inches dimension in mm symbol min nom max min nom max a 0.053 0.064 0.069 1.35 1.63 1.75 a 1 0.004 0.006 0.010 0.10 0.15 0.25 a 2 0.051 0.055 0.059 1.30 1.40 1.50 b 0.013 0.016 0.020 0.33 0.41 0.51 c 0.007 - 0.010 0.19 - 0.25 d 0.386 0.390 0.394 9. 80 9.91 10.01 e 0.150 0.154 0.157 3.80 3.90 4.00 e 0.050bsc 1.27bsc h e 0.228 0.236 0.244 5.80 6.00 6.20 l 0.016 0.025 0.050 0.40 0.64 1.27 l 1 0.042ref. 1.07ref. y - - 0.004 - - 0.10 q 0 - 8 0 - 8 http://www..net/ datasheet pdf - http://www..net/
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www.ite.com.tw IT8208M v0. 3 www.iteusa.com 17 ordering information 9. ordering information part no. package it8 208m 16 sop http://www..net/ datasheet pdf - http://www..net/

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