Advanced Configuration and Power Interface Specification

ACPI Embedded Controller Interface Specification
Data Returned:
SMB_DATA[0]:
SMB_DATA[1]:
SMB_STS:
SMB_PRTCL:
Low data byte received.
High data byte received.
Status code for transaction.
0x00 to indicate command completion.
12.9.2.9 Write Block
Data Sent:
SMB_ADDR: Address of SMBus device.
SMB_CMD:
Command byte to be sent.
SMB_DATA[0-31]: Data bytes to write (1-32).
SMB_BCNT: Number of data bytes (1-32) to be sent.
SMB_PRTCL: Write 0x0A to initiate the write block protocol, or 0x8A to initiate the write block
protocol with PEC.
Data Returned:
SMB_PRTCL:
SMB_STS:
0x00 to indicate command completion.
Status code for transaction.
12.9.2.10 Read Block
Data Sent:
SMB_ADDR:
SMB_CMD:
SMB_PRTCL:
Address of SMBus device.
Command byte to be sent.
Write 0x0B to initiate the read block protocol, or 0x8B to initiate the read block
protocol with PEC.
Data Returned:
SMB_BCNT: Number of data bytes (1-32) received.
SMB_DATA[0-31]: Data bytes received (1-32).
SMB_STS:
Status code for transaction.
SMB_PRTCL: 0x00 to indicate command completion.
12.9.2.11 Process Call
Data Sent:
SMB_ADDR:
SMB_CMD:
Address of SMBus device.
Command byte to be sent.
Version 6.0 653