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
Содержание COM Express cExpress-BT2
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