FW82801DBM S L6DN Intel, FW82801DBM S L6DN Datasheet - Page 227

• Manufacturer Part Number: FW82801DBM S L6DN
• Manufacturer: Intel

Specifications of FW82801DBM S L6DN

• Lead Free Status / RoHS Status: Not Compliant

Intel
®
Table 5-80. Send/Receive Byte Protocol with PEC
Table 5-81. Write Byte/Word Protocol without PEC
82801DBM ICH4-M Datasheet
Write Byte/Word
The first byte of a Write Byte/Word access is the command code. The next 1 or 2 bytes are the data
to be written. When programmed for a Write Byte/Word command, the Transmit Slave Address,
Device Command, and Data0 Registers are sent. In addition, the Data1 Register is sent on a Write
Word command. Software must force the I2C_EN bit to 0 when running this command. The format
of the protocol is shown in
11–18
20–27
20–27
11–18
2–8
Bit
10
19
28
29
2–8
Bit
1
9
10
19
28
29
1
9
Start
Slave Address - 7 bits
Write
Acknowledge from slave
Command code - 8 bits
Acknowledge from slave
PEC
Acknowledge from slave
Stop
Start
Slave Address - 7 bits
Write
Acknowledge from slave
Command code - 8 bits
Acknowledge from slave
Data Byte - 8 bits
Acknowledge from Slave
Stop
Send Byte Protocol
Write Byte Protocol
Description
Description
Table 5-81
and
Table
5-82.
20–27
11–18
2–8
11–18
20–27
29–36
Bit
10
19
28
29
1
9
2–8
Bit
10
19
28
37
38
1
9
Acknowledge
Start
Slave Address - 7 bits
Read
Acknowledge from slave
Data byte from slave
PEC from slave
Not Acknowledge
Stop
Receive Byte Protocol
Start
Slave Address - 7 bits
Write
Acknowledge from slave
Command code - 8 bits
Acknowledge from slave
Data Byte Low - 8 bits
Acknowledge from Slave
Data Byte High - 8 bits
Acknowledge from slave
Stop
Write Word Protocol
Description
Functional Description
Description
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