Product specifications
VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002 -18- Pin Descriptions
General Purpose I/O
Signal Name Pin # I/O Signal Description
GPIOA / GPI24 / GPO24 AE5 IO General Purpose I/O A / 24. RxE6[0] = 1
GPIOC / GPI25 / GPO25 AE6 IO
General Purpose I/O C / 25.
GPIOD / GPI30 / GPO30 AD6 IO
General Purpose I/O D / 30.
GPIOE / GPI31 / GPO31 AC6 IO
General Purpose I/O E / 31.
The output type of the above pins may be selected as either OD or TTL (see Device 17 Function 0 RxE7)
General Purpose Outputs
Signal Name Pin # I/O Signal Description
GPO0 (VSUS33)
AA3 OD
General Purpose Output 0.
GPO1 / SUSA# (VSUS33) AA2 O General Purpose Output 1. Rx94[2] = 1
GPO2 / SUSB# (VSUS33) AF2 O General Purpose Output 2. Rx94[3] = 1
GPO3 / SUSST1# (VSUS33) Y3 O General Purpose Output 3. Rx94[4] = 1
GPO4 / SUSCLK (VSUS33) AB1 O General Purpose Output 4. Rx95[1] = 1
GPO5 / CPUSTP# AC7 O General Purpose Output 5. RxE4[0] = 1
GPO6 / PCISTP# AF6 O General Purpose Output 6. RxE4[1] = 1
GPO7 /GNT5# P4 O General Purpose Output 7. RxE4[2] = 0
GPO8 / GPI8 / PCREQA / VGATE C8 O General Purpose Output 8. RxE4[3]=1, E5[4]=0, 53[7]=0
GPO9 / GPI9 / PCREQB B7 O General Purpose Output 9. RxE4[3]=1, 53[7]=0
GPO10 / GPI10 D7 O General Purpose Output 10. RxE4[3]=1
GPO11 / GPI11 A6 O General Purpose Output 11. RxE4[3]=1
GPO12 / GPI12 / INTE# / PCGNTA A7 O General Purpose Output 12. RxE4[4]=1, 5B[1]=0, 53[7]=0
GPO13 / GPI13 / INTF# / PCGNTB B8 O General Purpose Output 13. RxE4[4]=1, 5B[1]=0, 53[7]=0
GPO14 / GPI14 / INTG# D8 O General Purpose Output 14. RxE4[4]=1, 5B[1]=0
GPO15 / GPI15 / INTH# C7 O General Purpose Output 15. RxE4[4]=1, 5B[1]=0
GPO16 / SA16 / strap AF11 O General Purpose Output 16. RxE4[5] = 1
GPO17 / SA17 / strap AE11 O General Purpose Output 17. RxE4[5] = 1
GPO18 / SA18 / strap AD11 O General Purpose Output 18. RxE4[5] = 1
GPO19 / SA19 / strap AC11 O General Purpose Output 19. RxE4[5] = 1
GPO20 / GPI20 / ACSDIN2 / PCS0# U2 OD General Purpose Output 20. RxE4[6]=1, E5[1]=0
GPO21 / GPI21 / ACSDIN3 / PCS1# /SLPBTN# V1 OD General Purpose Output 21. RxE4[6]=1, E5[2]=0
GPO22 / GPI22 / GHI# R24 OD General Purpose Output 22. RxE5[3]=1, PMIO 4C[22]=1
GPO23 / GPI23 / DPSLP# P26 OD General Purpose Output 23. RxE5[3]=1, PMIO 4C[23]=1
GPO24 / GPI24 / GPIOA AE5 O/OD General Purpose Output 24. RxE6[0] = 1
GPO25 / GPI25 / GPIOC AE6 O/OD General Purpose Output 25. RxE6[1] = 1
GPO26 / GPI26 / SMBDT2 (VSUS33†) AD1 OD General Purpose Output 26. Rx95[2] = 1, 95[3] = 1
GPO27 / GPI27 / SMBCK2 (VSUS33†) AE1 OD General Purpose Output 27. Rx95[2] = 1, 95[3] = 1
GPO28 / GPI28 / VIDSEL P25 OD General Purpose Output 28. RxE5[3] = 1, PMIO 4C[28]=1
GPO29 / GPI29 / VRDSLP P24 OD General Purpose Output 29. RxE5[3] = 1, PMIO 4C[29]=1
GPO30 / GPI30 / GPIOD AD6 O/OD General Purpose Output 30. RxE6[6] = 1
GPO31 / GPI31 / GPIOE AC6 O/OD General Purpose Output 31. RxE6[7] = 1
Note: The output state for each of the above general purpose outputs is selectable via Power Management I/O registers Rx4C-48
Note: The output types of GPO24-25 and 30-31 are selectable OD vs TTL (see Function 0 RxE7)
Note: Default pin functions are underlined in the table above.
† The suspend voltage is only used for maintaining the operation of the SMB function on thses pins (Device 17 Function 0
Rx95[3] = 0). If VCC power is lost, the GPIO function of these pins and the state of PMIO Rx4C[27:26} (which determines the
GPO output level) will be lost also.