ADLINK CoreExpress-ECO2 - Manual (Page 18)

4.9 Read SMC Flags
This command reads the SMC Flags and gives an information of the internal status of the SMC.
START SMC_addr ACK command ACK START (Repeat) SMC_addr+1 ACK
length ACK(C) data ACK(C) STOP
Table 4.9.1 SMC transmitter format of the Read BIOS Flags Command Code
ITEM DESCRIPTION
START SM-bus start condition
SMC_addr 0x50 (8-bit)
ACK SM-bus acknowledge condition generated by receiver
command 0x35 = “Read SMC Flags” Command code
length 0x01 = 1 Bytes data length
data
Reflects the SMC status
Bit 5-7: System State
0 = S0-State
3 = S3-State
5 = S5-State
other values are Board specific -> see TME of Board chapter “LEMT
functions”
Bit 0-4: Exception Code
Board specific -> see TME of Board chapter “LEMT functions”
STOP SM-bus stop condition
Table 4.9.2 Explanation of Table 4.9.1