W83627EHF Datasheet, PDF (31/141 Pages) Winbond – evolving product from Winbonds most popular I/O family

W83627EHF/EF, W83627EHG/EG
6.2.2 I²C interface
The second interface uses I²C Serial Bus. W83627EHF/EHG has a programmable serial bus address.
It defined at Index 48h.
6.2.2.1. Serial bus (I2C) access timing
(a) Serial bus write to internal address register followed by the data byte
0
7
8
0
SCL
7
8
SDA
0
Start By
Master
1
0
1
1
0
Frame 1
Serial Bus Address Byte
SCL (Continued)
1 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by
627EHF
Frame 2
Internal Index Register Byte
Ack
by
627EHF
0
7
8
SDA (Continued)
D7 D6 D5 D4 D3 D2 D1 D0
Frame 3
Data Byte
AAckck
byby
672874ERHF
Stop
by
Master
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
(b) Serial bus read from a register
0
SCL
SDA
0
Start By
Master
1
0
1
1
0
Frame 1
Serial Bus Address Byte
0
7
8
0
7
8
1
R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by
627EHF
Frame 2
Internal Index Register Byte
Ack
by
627EHF
0
7
8
0
7
8
0
Repeat
start
by
Master
1
0
1
1
0
Frame 3
Serial Bus Address Byte
1 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by
627EHF
Frame 4
Data Byte
Ack
by
Master
Stop by
Master
0
Figure 2. Serial Bus Read from Internal Address Register
Publication Release Date: January 18, 2006
-25-
Revision 1.0