FW82801DBM S L6DN Intel, FW82801DBM S L6DN Datasheet - Page 233
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FW82801DBM S L6DN
Manufacturer Part Number
FW82801DBM S L6DN
Description
Manufacturer
Intel
Datasheet
1.FW82801DBM_S_L6DN.pdf
(615 pages)
Specifications of FW82801DBM S L6DN
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Intel
®
Table 5-88. Block Read/Write Protocol with PEC
82801DBM ICH4-M Datasheet
Note: This command is supported independent of the setting of the I2C_EN bit. The I
I
This command allows the ICH4 to perform block reads to certain I
E
as well as the Command field. This command field could be used as the extended 10-bit address for
accessing I
However, this does not allow access to devices using the I
bytes after the address. Typically these data bytes correspond to an offset (address) within the serial
memory chips.
with the PEC_EN bit set produces undefined results. Software must force both the PEC_EN and
AAC bit to 0 when running this command.
2
2
C Read
PROMs) in 10-bit addressing mode only. The SMBus Block Read sends both the 7-bit address,
20–27
29–36
38–45
11–18
2–8
Bit
10
19
28
37
46
...
...
...
...
...
...
1
9
2
Start
Slave Address - 7 bits
Write
Acknowledge from slave
Command code - 8 bits
Acknowledge from slave
Byte Count - 8 bits
(Skip this step if I
Acknowledge from Slave
(Skip this step if I2C_EN bit set)
Data Byte 1 - 8 bits
Acknowledge from Slave
Data Byte 2 - 8 bits
Acknowledge from slave
Data Bytes / Slave
Acknowledges...
Data Byte N - 8 bits
Acknowledge from Slave
PEC - 8 bits
Acknowledge from Slave
Stop
C devices that use 10-bit addressing.
Block Write Protocol
Description
2
C_En bit set)
11–18
21–27
30–37
39–46
48–55
2–8
Bit
10
19
20
28
29
38
47
56
...
...
...
...
...
...
1
9
2
C “Combined Format” that has data
Start
Slave Address - 7 bits
Write
Acknowledge from slave
Command code - 8 bits
Acknowledge from slave
Repeated Start
Slave Address - 7 bits
Read
Acknowledge from slave
Byte Count from slave - 8 bits
Acknowledge
Data Byte 1 from slave - 8 bits
Acknowledge
Data Byte 2 from slave - 8 bits
Acknowledge
Data Bytes from slave/Acknowledge
Data Byte N from slave - 8 bits
Acknowledge
PEC from slave - 8 bits
NOT Acknowledge
Stop
Block Read Protocol
2
C devices (e.g., serial
Functional Description
Description
2
C Read command
233
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