Status Leds - ADLINK Technology COM Express Express-BL User Manual

4.3.

Status LEDs

To facilitate easier maintenance, status LED's are mounted on the board.
LED Descriptions:
Name Color
LED1 Blue
LED2 Green
LED3 Red
Page 36
LED1 LED2 LED3
Connection
BMC output
Power Source 3Vcc
BMC output
and same signal as WDT
(B27) on BtB connector
Function
Power Sequence Status Code (BMC)
Power Changes, RESET
(see 5.1.4 Exception Codes below)
S0
S3/S4/S5
ECO mode
Module power up
Watchdog counting
Watchdog timed out
Watchdog RESET
Rebooted after WD RESET
Rebooted after PWRBTN
Rebooted after RESET BTN
Note: only a RESET not initiated by the BMC can clear the WD LED (user action)
LED ON
LED OFF
LED OFF
LED OFF
LED OFF
LED ON
LED ON
LED ON
LED ON
LED OFF