ADLINK Technology COM Express Type 7 Starter Kit Plus, Quick Start Manual, Page: 22 / 26

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Debug Card
5.1. Connecting the COM Express Module and Debug Card
Connect the COM Express module to the DB40 debug card using the 40-pin flat cable provided (P/N: 30-30016-
0000).
5.2. Buttons and Switches
This section describes the buttons and switches on the DB40 debug card.
Power Button : toggles the PWRBTN# signal of the COM Express module.
Reset Button: toggles the SYS_RESET# signal of the COM Express module.
Mode Switch: this 4-pole DIP switch selects several modes :
Switch Function
1 POST Watchdog
ON = Disable
OFF = Enable (default)
2 BIOS Mode
ON = PICMG Mode
OFF = Failsafe Mode (default)
3 BIOS Failsafe Mode
ON = Boot from SPI0 (default)
OFF = Boot from SPI1
4 Not used