I/O Subsystem

Intel® Server Board SDS2

 

 

 

Pad

GPIO Name

Description

 

 

 

Y19

N_NVRAMCLR

Input from jumper to be in BIOS Recovery mode in case of corruption

 

 

 

V17

N_PASSDIS_00

Input from jumper to clear password assignments

 

 

 

U16

N_CMOSCLR_00

Input from jumper to clear setup info in CMOS

 

 

 

T20

N_F3SETUPEN_00

Input from jumper to to be in special test mode (manufacturing only)

 

 

 

T19

N_BMC_SCIN

Input from BMC of SCI event

 

 

 

T18

N_BMCISPMD_00

Input from jumper to to be in special test mode (manufacturing only)

 

 

 

U18

N_FRB3STP_00

Output signal to turn off FRB timer to stop fault conditions (this signal is wire-or

 

 

with the 2-pin jumper

 

 

 

Y16

N_SCSI_IDSEL_EN

Output signal to disable onboard SCSI controller

 

 

 

V12

N_LAN2_IDSEL_EN

Output signal to disable onboard NIC2

 

 

 

U12

N_LAN1_IDSEL_EN

Output signal to disable onboard NIC1

 

 

 

V19

CSBPICD0

CSB5 APIC Data Bus 0

 

 

 

W20

CSBPICD1

CSB5 APIC Data Bus 1

 

 

 

Y20

N_ROM_CSN

Output signal for BIOS Chip Select

 

 

 

U19

N_VGA_IDSEL_EN

Output signal to disable onboard Video

 

 

 

4.6Chipset Support Components

4.6.1Super I/O

The National Semiconductor PC87417 Super I/O device contains all of the necessary circuitry to control two serial ports, one parallel port, floppy disk, and PS/2-compatible keyboard and mouse. The SDS2 Server Board supports the following features:

GPIO

Two serial ports

Floppy

Keyboard and mouse through PS/2 connectors

Parallel port

Real-time clock

Wake-up control

4.6.1.1General Purpose Input and Output - GPIO

The National Semiconductor* PC87417 Super I/O provides number of general-purpose input/output pins that the SDS2 Server Board utilizes. The following table identifies the pin, the signal name used in the schematic and a brief description of its usage.

 

 

 

Table 11. Super I/O GPIO Usage Table

 

 

 

 

 

 

Pin #

Signal Name

Description

 

 

 

 

 

 

 

10

N_BMC_SYSIRQ_00

System Interrupt Controller interrupt from BMC

 

 

 

 

 

 

 

13

N_SIO_CLK_40M_BMC

40MHz clock output to BMC

 

 

 

 

 

 

 

 

 

 

 

 

18

 

Revision 1.2

 

 

 

Order Number: A85874-002

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Intel SDS2 manual Chipset Support Components, General Purpose Input and Output Gpio, Super I/O Gpio Usage Table