8355 N/B MAINTENANCE

5.3 VT8235 South Bridge-6

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

/PDREQA

C8

I

General Purpose Input8. RxE4[3]=0, E5[4]=0,

/VGATE

 

 

 

 

53[7]=0

GPI9 /GPO9 /PDREQB

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

A7

I

General Purpose Input 12. RxE4[4]=0,5B[1]=0,

/INTE#/PDGNTA

 

 

 

53[7]=0

GPI13

 

/GPO13

B8

I

General Purpose Input 13. RxE4[4]=0,5B[1]=0,

/INTF#/PDGNTB

 

 

 

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

 

 

U2

I

General Purpose Input 20.RxE4[6]=1,E5[1]=0,

/GPO20/ACSDIN2/PCS0#

 

 

PMIO 4C[20]=1

GPI21

 

 

V1

I

General Purpose Input 21.RxE4[6]=1,E5[2]=0

/GPO21/ACSDIN3/PCS1#/SLP

 

 

PMIO 4C[21]=1

BTN#

 

 

 

 

 

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

AD1

I

General Purpose Input 26.Rx95[2]=1,95[3]=0

(VSUS33)

 

 

 

 

General Purpose Inputs Continue

Signal Name

Pin #

I/O

Signal Description

GPI27 /GPO27 /SMBCK2

AE1

I

General Purpose Input 27.Rx95[2]=1,95[3]=0

(VSUS33)

 

 

 

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:Defaul pin function is underlined in he signal name column above.

Note:Input pin s a us for he 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.

Resets,Clocks,and Power Status

Signal Name

Pin #

I/O

Signal Description

PWRGD

AF4

I

Power Good. Connected o he Power Good signal on he Power

 

 

 

Supply. Internal logic powered by VBAT.

PWROK#

AE2

O

Power OK. Internal logic powered by VSUS33.

 

 

 

 

PCIRST#

R2

O

PCI Reset. Active low reset signal for he PCI bus. The VT8235

 

 

 

will assert his pin during power-up or from he control register.

OSC

AC12

I

Oscillator.14.31818 MHz clock signal used by he in ernal

 

 

 

Timer.

RTCX1

AD4

I

RTC Crystal Input :32.768 KHz crystal or oscilla or input.

 

 

 

This input is used for the internal RTC and power-well power

 

 

 

management logic and is powered by VBAT.

RTCX2

AF3

O

RTC Crystal Output :32.768 KHz crystal output. Internal

 

 

 

logic powered by VBAT.

TEST

AF9

I

Test.

 

 

 

 

TPO

U24

O

Test Pin Output. Output pin for est mode.

 

 

 

 

NC

W22,AD17

-

No Connect. Reserved for future use,do not connect.

 

 

 

 

111

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MiTAC 8355 service manual VT8235 South Bridge-6, General Purpose Inputs Continue, Resets,Clocks,and Power Status
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