Product specifications

VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002 -17- Pin Descriptions
General Purpose Inputs
Signal Name Pin # I/O Signal Description
GPI0 (VBAT)
AE3 I General Purpose Input 0. Status on PMIO Rx20[0]
GPI1 (VSUS33)
AC3 I General Purpose Input 1. Status on PMIO Rx20[1]
GPI2 / EXTSMI# (VSUS33) AA1 I General Purpose Input 2. Status on PMIO Rx20[4]
GPI3 / RING# (VSUS33) Y2 I General Purpose Input 3. Status on PMIO Rx20[8]
GPI4 / LID# (VSUS33) AC1 I General Purpose Input 4. Status on PMIO Rx20[11]
GPI5 / BATLOW# (VSUS33) W4 I General Purpose Input 5. Status on PMIO Rx20[12]
GPI6 / AGPBZ# A8 I General Purpose Input 6. Status on PMIO Rx20[5]
GPI7 / REQ5# N4 I General Purpose Input 7. RxE4[2] = 0
GPI8 / GPO8 / PCREQA / VGATE C8 I General Purpose Input 8. RxE4[3] = 0, E5[4]=0, 53[7] = 0
GPI9 / GPO9 / PCREQB B7 I General Purpose Input 9. RxE4[3] = 0, 53[7] = 0
GPI10 / GPO10 D7 I General Purpose Input 10. RxE4[3] = 0
GPI11 / GPO11 A6 I General Purpose Input 11. RxE4[3] = 0
GPI12 / GPO12 / INTE# / PCGNTA A7 I General Purpose Input 12. RxE4[4] = 0, 5B[1]=0, 53[7]=0
GPI13 / GPO13 / INTF# / PCGNTB B8 I General Purpose Input 13. RxE4[4] = 0, 5B[1]=0, 53[7]=0
GPI14 / GPO14 / INTG# D8 I General Purpose Input 14. RxE4[4] = 0, 5B[1]=0
GPI15 / GPO15 / INTH# C7 I General Purpose Input 15. RxE4[4] = 0, 5B[1]=0
GPI16 / INTRUDER# (VBAT) AD3 I General Purpose Input 16. Status on PMIO Rx20[6]
GPI17 / CPUMISS Y1 I General Purpose Input 17. Status on PMIO Rx20[5]
GPI18 / THRM# / AOLGPI Y4 I General Purpose Input 18. Rx8C[3] = 0
GPI19 / IORDY AD10 I General Purpose Input 19. RxE5[0] = 1
GPI20 / GPO20 / ACSDIN2 / PCS0# U2 I General Purpose Input 20. RxE4[6]=1, E5[1]=0,
PMIO 4C[20] = 1
GPI21 / GPO21 / ACSDIN3 / PCS1# / SLPBTN# V1 I General Purpose Input 21. RxE4[6]=1, E5[2]=0
PMIO 4C[21] = 1
GPI22 / GPO22 / GHI# R24 I General Purpose Input 22. RxE5[3] = 1, PMIO 4C[22] = 1
GPI23 / GPO23 / DPSLP# P26 I General Purpose Input 23. RxE5[3] = 1, PMIO 4C[23] = 1
GPI24 / GPO24 / GPIOA AE5 I General Purpose Input 24. RxE6[0] = 0
GPI25 / GPO25 / GPIOC AE6 I General Purpose Input 25. RxE6[1] = 0
GPI26 / GPO26 / SMBDT2 (VSUS33) AD1 I General Purpose Input 26. Rx95[2] = 1, 95[3] = 0
GPI27 / GPO27 / SMBCK2 (VSUS33) AE1 I General Purpose Input 27. Rx95[2] = 1, 95[3] = 0
GPI28 / GPO28 / VIDSEL P25 I General Purpose Input 28. RxE5[3] = 1, PMIO 4C[28] = 1
GPI29 / GPO29 / VRDSLP P24 I General Purpose Input 29. RxE5[3] = 1, PMIO 4C[29] = 1
GPI30 / GPO30 / GPIOD AD6 I General Purpose Input 30. RxE6[6] = 0
GPI31 / GPO31 / GPIOE AC6 I General Purpose Input 31. RxE6[7] = 0
Note: Default pin function is underlined in the signal name column above.
Note: Input pin status for the above GPI pins 31-0 is also available on PMIO Rx4B-48[31-0]
Note: See also Power Management I/O register Rx50 for input pin change status for GPI16-19 and 24-27
Note: See also Power Management I/O register Rx52 for SCI/SMI select for GPI16-19 and 24-27
Note: See also Power Management I/O register Rx4C. General purpose input pins 20-31 are shared with OD (open drain) general
purpose output functions, so to use one of these pins as an input pin, a one must be written to the corresponding bit of PMIO
Rx4C.