User Guide CC9-SAMBA •
CompactPCI®
Pentium M CPU Board
CC9-SAMBA GPIO Usage ICH4
Function
GPIO
Type
Tol.
Origin/Destination
© EKF -41- ekf.com
WDOG_TRG#
GPO 21
O
3.3V
PLD (HW Watchdog Trigger)
-
GPO 22
OD
3.3V
-
-
GPO 23
O
3.3V
-
SMB_CPCI_EN
GPIO 24
I/O
3.3V
Connect CPCI IPMB to local SMBus
LOW: IPMB disconnected from SMBus
HIGH: IPMB connected to SMBus
-
GPIO 25
I/O
3.3V
-
VGA_SWITCH
GPIO 27
I/O
3.3V
VGA Switching Line:
LOW: VGA via Rear I/O
HIGH: VGA via Front I/O
ETH_SWITCH
GPIO 28
I/O
3.3V
Ethernet Switching Line:
LOW: Ethernet via Rear I/O
HIGH: Ethernet via Front I/O
BOARD_CFG
1)
GPIO 32-34
I
3.3V
Board Configuration Jumpers
-
GPIO 35-43
I/O
3.3V
-
1)
Feature available as of revision 2.
GPIO Usage FWH
CC9-SAMBA GPIO Usage FWH
Function
GPIO
Type
Tol.
Origin/Destination
FWH_ID
GPI 0
I
3.3V
FWH Identity: Hardwired to LOW
(indicates FWH #1)
-
GPI 1
I
3.3V
-
WDOGRST
GPI 2
I
3.3V
PLD (Last HW Reset caused by
watchdog)
MSB PCB REV
GPI 3
I
3.3V
GPI 3 GPI 4 Rev.
0
0
0
0
1
1
1
0
2
1
1
3+
LSB PCB REV
GPI 4
I
3.3V
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