82801CA Datasheet, PDF (199/521 Pages) Intel Corporation – I/O Controller Hub 3-S (ICH3-S)

Functional Description
Table 5-83. Read Byte/Word Protocol with PEC
Read Byte Protocol
Bit
1
2–8
9
10
11–18
19
20
21–27
28
29
30–37
38
39–46
47
48
Description
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
Data from slave–8 bits
Acknowledge
PEC from slave
NOT Acknowledge
Stop
Bit
1
2–8
9
10
11–18
19
20
21–27
28
29
30–37
38
39–46
47
48–55
56
57
Read Word Protocol
Description
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
Data Byte Low from slave–8 bits
Acknowledge
Data Byte High from slave–8 bits
Acknowledge
PEC from slave
NOT acknowledge
Stop
Intel^® 82801CA ICH3-S Datasheet
199