Advanced Configuration and Power Interface Specification

ACPI Embedded Controller Interface Specification
Data Returned:
SMB_STS:
SMB_PRTCL:
Status code for transaction.
0x00 to indicate command completion.
12.9.2.3 Send Byte
Data Sent:
SMB_ADDR:
SMB_CMD:
SMB_PRTCL:
Address of SMBus device.
Command byte to be sent.
Write 0x04 to initiate the send byte protocol, or 0x84 to initiate the send byte protocol
with PEC.
Data Returned:
SMB_STS:
SMB_PRTCL:
Status code for transaction.
0x00 to indicate command completion.
12.9.2.4 Receive Byte
Data Sent:
SMB_ADDR:
SMB_PRTCL:
Address of SMBus device.
Write 0x05 to initiate the receive byte protocol, or 0x85 to initiate the receive byte
protocol with PEC.
Data Returned:
SMB_DATA[0]:
SMB_STS:
SMB_PRTCL:
Data byte received.
Status code for transaction.
0x00 to indicate command completion.
12.9.2.5 Write Byte
Data Sent:
SMB_ADDR:
SMB_CMD:
SMB_DATA[0]:
SMB_PRTCL:
Address of SMBus device.
Command byte to be sent.
Data byte to be sent.
Write 0x06 to initiate the write byte protocol, or 0x86 to initiate the write byte protocol
with PEC.
Data Returned:
SMB_STS:
Status code for transaction.
Version 6.0 651