cExpress-AL
Smart Embedded Management Agent (SEMA)
41
5.1.4. Exception
Codes
In case of an error, the BMC drives a blinking code on the blue Status LED (LED1). The same error code is also
reported by the BMC Flags register. The Exception Code is not stored in the Flash Storage and is cleared when the
power is removed. Therefore, a “Clear Exception Code” command is not needed or supported.
Exception Code
Error Message
0 NOERROR
2 NO_SUSCLK
3 NO_SLP_S4_S5
4 NO_SLP_S3
5 BIOS_FAIL
6 RESET_FAIL
7 RESETIN_FAIL
8 NO_CB_PWRGD
9 CRITICAL_TEMP
10 POWER_FAIL
11 VOLTAGE_FAIL
12 NO_3V3_5V_A_PG
13 NO_VNN_PG
14 NO_1V24_A_PG
15 NO_VDDQ_PG
16 NO_V1P05S_PG
17 NO_SYS_GD
18 NO_V12
19 MEMORY_ERROR
20 NO_P3V3_A_READY
Table 9: SEMA Exception Codes
5.1.5. BMC
Flags
The BMC Flags register returns the last detected Exception Code since power-up and shows the BIOS in use and
the power mode.
Bit
Description
[ 0 ~ 4 ]
Exception Code
[ 6 ]
0 = AT mode
1 = ATX mode
[ 7 ]
0 = Standard BIOS
1 = Fail-safe BIOS.
Table 10: SEMA BMC Flags
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