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General Purpose Outputs
Signal Name Pin # I/O Signal Description
GPO0 (VSUS33) AA3 O
General Purpose Output 0.
GPO1 / SUSA#
(VSUS33)
AA2 O
General Purpose Output 1. Rx94[2] = 1
GPO2 / SUSB#
(VSUS33)
AD3 O
General Purpose Output 2. Rx94[3] = 1
GPO3 /
SUSST1#
(VSUS33)
Y3 O
General Purpose Output 3. Rx94[4] = 1
GPO4 / SUSCLK
(VSUS33)
AB3 O
General Purpose Output 4. Rx95[1] = 1
GPO5 /
CPUSTP#
AC7 O
General Purpose Output 5. RxE4[0] = 1
GPO6 / PCISTP#
AD6 O
General Purpose Output 6. RxE4[1] = 1
GPO7 / GNT5#
R2 O
General Purpose Output 7. RxE4[2] = 0
GPO12 / GPI12 /
INTE#
D4 O
General Purpose Output 12. RxE4[4]=1, 5B[1]=0
GPO13 / GPI13 /
INTF#
E4 O
General Purpose Output 13. RxE4[4]=1, 5B[1]=0
GPO14 / GPI14 /
INTG#
A3 O
General Purpose Output 14. RxE4[4]=1, 5B[1]=0
GPO15 / GPI15 /
INTH#
B3 O
General Purpose Output 15. RxE4[4]=1, 5B[1]=0
GPO20 / GPI20 /
ACSDIN2 /
PCS0#
U1 OD
General Purpose Output 20. RxE4[6]=1, E5[1]=0
GPO21 / GPI21 /
ACSDIN3 /
PCS1#
/SLPBTN#
V3 OD
General Purpose Output 21. RxE4[6]=1, E5[2]=0
GPO22 / GPI22 /
GHI#
R22 OD
General Purpose Output 22. RxE5[3]=1, PMIO 4C[22]=1
GPO23 / GPI23 /
DPSLP#
P21 OD
General Purpose Output 23. RxE5[3]=1, PMIO 4C[23]=1
GPO26 / GPI26 /
SMBDT2
(VSUS33ƒ)
AD1 OD
General Purpose Output 26. Rx95[2] = 1, 95[3] = 1
GPO27 / GPI27 /
SMBCK2
(VSUS33ƒ)
AC3 OD
General Purpose Output 27. Rx95[2] = 1, 95[3] = 1
General Purpose Outputs (Continued)
Signal Name Pin # I/O Signal Description
GPO28 / GPI28
AC8 OD
General Purpose Output 28. RxE5[3] = 1, PMIO 4C[28]=1
GPO29 / GPI29 /
VRDSLP
AB9 OD
General Purpose Output 29. RxE5[3] = 1, PMIO 4C[29]=1
Note: The output state for each of the above general purpose outputs is selectable via Power
Management I/O registers Rx4C-48
Note: Default pin functions are underlined in the table above.
Power Management and Event Detection
Signal Name Pin # I/O Signal Description
PWRBTN# AD2 I
Power Button. Used by the Power Management subsystem
to monitor an external
system on/off button or switch. Internal logic powered
by VSUS33.
SLPBTN# /
GPIO21/
ACSDIN3 /
PCS1#
V3 I
Sleep Button. Used by the Power Management subsystem
to monitor an external sleepbutton or switch. RxE4[6] = 1,
80[6] = 1, E5[2] = 0 and PMIO Rx4C[21] = 1
RSMRST# AD4 I
Resume Reset. Resets the internal logic connected to the
VSUS33 power plane and
also resets portions of the internal RTC logic. Internal logic
powered by VBAT.
EXTSMI# /
GPI2
AA1 IOD
External System Management Interrupt. When enabled
to allow it, a falling edge on
this input causes an SMI# to be generated to the CPU to
enter SMI mode. (10K PU to
VSUS33 if not used) (3.3V only)
PME# W4 I
Power Management Event. (10K PU to VSUS33 if not
used)
SMBALRT# AB1 I
SMB Alert. When programmed to allow it (SMB I/O
Rx8[3]=1), assertion generates
an IRQ, SMI, or power management event. (10K PU to
VSUS33 if not used)
5.3 VIA VT8235CD South Bridge(8)
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