FW82801EB Intel, FW82801EB Datasheet - Page 238
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FW82801EB
Manufacturer Part Number
FW82801EB
Description
Manufacturer
Intel
Datasheet
1.FW82801EB.pdf
(671 pages)
Specifications of FW82801EB
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Functional Description
l
238
Table 112. Block Read/Write Protocol without PEC
Note: For Block Write, if the I
When programmed for a block write command, the Transmit Slave Address, Device Command,
and Data0 (count) registers are sent. Data is then sent from the Block Data Byte register; the total
data sent being the value stored in the Data0 Register. On block read commands, the first byte
received is stored in the Data0 register, and the remaining bytes are stored in the Block Data Byte
register. The format of the Block Read/Write protocol is shown in
will still send the number of bytes (on writes) or receive the number of bytes (on reads) indicated in
the DATA0 register. However, it will not send the contents of the DATA0 register as part of the
message.
27:20
36:29
18:11
45:3
Bit
8:2
10
19
28
37
46
...
...
...
...
1
9
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
Stop
Block Write Protocol
2
Description
C_EN bit is set, the format of the command changes slightly. The ICH5
2
C_En bit set)
Intel
27:21
37:30
46:39
55:48
®
18:11
Bit
8:2
10
19
20
28
29
38
47
56
...
...
...
...
1
9
82801EB ICH5 / 82801ER ICH5R Datasheet
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
NOT Acknowledge
Stop
Block Read Protocol
Table 112
Description
and
Table
113.
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