cExpress-AL
Module Interfaces 33
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 WD LED = LED OFF
Watchdog counting WD LED = Keep Last State
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 OFF
Rebooted after RESET BTN WD LED = LED OFF
Table 3: cExpress-AL LED Descriptions
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