9 read smc flags – ADLINK CoreExpress-ECO2 User Manual
Page 18
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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
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