ADLINK cExpress-BT - Manual (Page 34)

Page 34 cExpress-BT
4.3. Status LEDs
To facilitate easier maintenance, status LED’s are mounted on the board.
LED1 LED2 LED3
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 LED OFF
Watchdog counting LED OFF
Watchdog timed out LED ON
Watchdog RESET LED ON
Rebooted after WD RESET LED ON
Rebooted after PWRBTN LED ON
Rebooted after RESET BTN LED OFF
Note: only a RESET not initiated by the BMC can clear the WD LED (user action)