ADLINK CoreExpress-ECO2 - Manual (Page 9)

2.2 SMC
STANDARD TRANSMITTER FORMAT
(
READ CYCLE
)
The SMC transmitter format is shown in Table 2.2.1.
START SMC_addr ACK command ACK START (Repeat) SMC_addr+1 ACK length ACK(C)
data_byte ACK(C) n-bytes ACK(C) STOP
Table 2.2.1 SMC transmitter format (direction of length and data-bytes changed)
ITEM DESCRIPTION
START SM-bus start condition
SMC_addr 0x50 (8-bit) (send by chipset)
ACK(C) SM-bus acknowledge (send by chipset)
ACK SM-bus acknowledge (send by SMC)
command Selected Command (send by chipset)
length Number of Data-bytes (send by SMC)
data_byte data byte transmitted to SMC receiver (send by SMC)
n-bytes more data bytes transmitted to SMC receiver (send by SMC)
STOP SM-bus stop condition
Table 2.2.2 Explanation of Table 2.2.1