ADLINK CoreExpress-ECO2 - Manual (Page 17)

4.8 Read Power Cycles
This command reads the Power Cycles of the System. The Power-cycle-counter has a 32-bit (four
byte wide) size and is updated every time when the System is Powered-ON in the Flash of the SMC.
The Most Significant Byte is sent first, followed by the next highest Byte down to the Least
Significant Byte (Table 4.8.1).
START SMC_addr ACK command ACK START (Repeat) SMC_addr+1 ACK
length ACK(C) Byte 1 (MSB) ACK(C) … ACK(C) Byte 4 (LSB) ACK(C) STOP
Table 4.8.1 SMC transmitter format of the Power Cycles Command Code
ITEM DESCRIPTION
START SM-bus start condition
SMC_addr 0x50 (8-bit)
ACK SM-bus acknowledge condition generated by receiver
command 0x34 = “Read Power Cycles” Command code
length 0x04 = 4 Bytes data length
Byte 1-4 Value of Power Cycle Counter
STOP SM-bus stop condition
Table 4.8.2 Explanation of Table 4.8.1