ADLINK Technology COM Express cExpress-BT2, User Manual

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cExpress-BT2
Module Interfaces
29
4.3. Status LEDs
To facilitate easier maintenance, status LED’s are mounted on the board.
LED1 LED2 LED3
LED Descriptions
Name Color Connection Function
LED1 Blue BMC output Power Sequence Status Code (BMC)
Power Changes, RESET
(see 5.1.4 Exception Codes)
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)
Table 3: cExpress-BT2 LED Descriptions