User guide xb1 com express module – Intel 82600 User Manual
Page 27
User Guide XB1 COM Express Module
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GPIO Usage
GPIO Usage ICH6
XB1 COM Express Module GPIO Usage ICH6
GPIO
Type
Tol.
Function
Description
GPI 0
I
5V
EXCD1_CPPE#
PCI ExpressCard PCI Express capable card 1 request
GPI 1
I
5V
EXCD0_CPPE#
PCI ExpressCard PCI Express capable card 0 request
GPI 2
I
5V
PG_VR33
Power Good signal from 3.3V voltage regulator
GPI 3
I
5V
WAKE1#
General purpose wake up signal from carrier board
GPI 4
I
5V
PWR_OK
Power OK from main power supply
GPI 5
I
5V
BATLOW#
Indicates that external battery is low
GPI 6
I
3.3V
GP_JUMP#
BIOS CMOS Values Reset Jumper JGP
GPI 7
I
3.3V
HM_INT#
Hardware Monitor LM87 Interrupt Line
GPI 8
I
3.3V
I2C_DAT
I
2
C emulated data signal (input only, see also GPIO 28)
GPI 9
I
3.3V
USB_OC45#
USB Ports 4 & 5 Overcurrent Detect Line (GPI9/10 joined)
GPI 10
I
3.3V
USB_OC45#
USB Ports 4 & 5 Overcurrent Detect Line (GPI9/10 joined)
GPI 11
I
3.3V
SMB_ALERT#
System Management Bus Alert
GPI 12
I
3.3V
PEG_ENABLE#
If pulled low externally, enables the PCI Express x 16 external
graphics interface and disables internal graphics (internally
pulled up 10k/3.3V)
GPI 13
I
3.3V
I2C_CK
I
2
C emulated clock signal (input only, see also GPIO 27)
GPI 14
I
3.3V
USB_OC67#
USB Ports 6 & 7 Overcurrent Detect Line (GPI14/15 joined)
GPI 15
I
3.3V
USB_OC67#
USB Ports 6 & 7 Overcurrent Detect Line (GPI14/15 joined)
GPO 16
O
3.3V
EXCD1_RST#
PCI ExpressCard reset card 1
GPO 17
O
3.3V
EXCD0_RST#
PCI ExpressCard reset card 0
GPO 18
O
3.3V
ICH_GPO18
Control output to PLD
GPO 19
O
3.3V
ICH_GPO19
Control output to PLD
GPO 20
O
3.3V
ICH_GPO20
Control output to PLD
GPO 21
O
3.3V
ICH_GPO21
Control output to PLD
GPO 23
O
3.3V
not used - open
GPIO 24
I/O
3.3V
ICH_GPIO24
for future use as PLD control signal (either input or output)
GPIO 25
O
3.3V
not used - open (configured as output by BIOS)
GPI 26
I
3.3V
CLK_64HZ
64Hz clock from 4040 binary counter
GPIO 27
O
3.3V
I2C_CK
I
2
C emulated clock signal (output only, see also GPI 13)
GPIO 28
O
3.3V
I2C_DAT
I
2
C emulated data signal (output only, see also GPI 8)
GPI 29
I
3.3V
BOARD_CFG1
Board configuration options line 1