User Guide XB1 COM Express Module
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 | I2C 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 |
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| graphics interface and disables internal graphics (internally |
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| pulled up 10k/3.3V) |
GPI 13 | I | 3.3V | I2C_CK | I2C 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 | I2C emulated clock signal (output only, see also GPI 13) |
GPIO 28 | O | 3.3V | I2C_DAT | I2C emulated data signal (output only, see also GPI 8) |
GPI 29 | I | 3.3V | BOARD_CFG1 | Board configuration options line 1 |
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