ADLINK cExpress-BL - Manual (Page 34)

Page 34 cExpress-BL
4.2 Status LEDs
To facilitate easier maintenance, status LED’s are mounted on the board.
¾ LED Descriptions
Name Color Connection Function
LED1 Blue BMC output Power Sequence Status Code (BMC)
Power Changes, RESET
(see 5.1.4 Exception Codes below)
LED2 Green Power Source 3Vcc S0 LED ON
S3/S4/S5 LED OFF
ECO mode LED OFF
LED3 Red BMC output
and same signal as WDT
(B27) on BtB connector
Module power up WD LED = LED OFF
Watchdog counting WD LED = LED OFF
Watchdog timed out WD LED = LED ON
Watchdog RESET WD LED = LED ON
Rebooted after WD RESET WD LED = LED ON
Rebooted after PWRBTN WD LED = LED ON
Rebooted after RESET BTN WD LED = LED OFF
Note: only a RESET not initiated by the BMC can clear the WD LED (user action)