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User Guide XB1 COM Express Module
XB1 COM Express Module GPIO Usage ICH6
GPIO Type Tol. Function Description
©EKF -28- ekf.com
GPI 30 I 3.3V BOARD_CFG2 Board configuration options line 2
GPI 31 I 3.3V BOARD_CFG3 Board configuration options line 3
GPIO 32 O 3.3V not used - open (configured as output by BIOS)
GPIO 33 O 3.3V NC1_OFF# Enable Ethernet Controller NC1
GPIO 34 I/O 3.3V ICH_GPIO34 for future use as PLD control signal (either input or output)
GPI 40 I 5V PG_VR18 Power Good signal from 1.8V voltage regulator
GPI 41 I 3.3V LPC_DRQCOM# LPC Port DMA request from COM Express carrier board
GPO 48 O 3.3V not used - open
GPO 49 OD 1.05V CPU_PWRGD CPU Power Good signal
italic blue –> signal available on J-COM
GPIO Usage FWH
XB1 COM Express Module GPIO Usage FWH
GPIO Type Tol. Function Description
GPI 0 I 3.3V FWH_ID FWH Identity: Fixed to GND (indicates FWH #1)
GPI 1 I 3.3V IDE_CLBID# IDE 80-pos. Cable Detection Line
GPI 2 I 3.3V WDOGRST Last Hardware Reset caused by watchdog
GPI 3 I 3.3V LSB PCB REV GPI 4 GPI 3 Rev.
0 0 0
0 1 1
1 0 2
1 1 3+
GPI 4 I 3.3V MSB PCB REV