W83601R_06 Datasheet, PDF (12/21 Pages) Winbond – Winbond GPI/O IC

W83601R/G/W83602R/G
8. FUNCTION DESCRIPTIONS
8.1 ACCESS INTERFACE
W83601R/G/W83602R/G provides a two-wired serial interface which is compliant with SMBus^TM 1.0
Write Byte and Read Byte protocol.
8.1.1 Write a data into W83601R/G/W83602R/G register
0
SCL
780
78
SDA
0 0 1 1 A2 A1 A0 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Start By
Master
Frame 1
Serial Bus Address Byte
0
Ack
by
601R
Ack
Frame 2
by
601R
Internal Index Register Byte
SCL (Continued)
SDA (Continued)
78
D7 D6 D5 D4 D3 D2 D1 D0
Frame 3
Data Byte
Ack
by
601R
Stop
by
Master
8.1.2 Read a data from W83601R/G/W83602R/G register
0
SCL
SDA
0
Start By
Master
780
4
78
...
0 1 1 A2 A1 A0 R/W
D7 D6 D5 D4 D3 D2 D1 D0
...
Frame 1
0
Ack
by
Frame 2
Ack
by
Serial Bus Address Byte
601R
Pointer Byte
601R
0
SCL (Cont..)
SDA (Cont..)
0
Repea
Start
By
Master
780
78
0 1 1 A2 A1 A0 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Frame 3
Serial Bus Address Byte
1
Ack
by
601R
Frame 4
MSB Data Byte
No Ack
by
Master
Stop by
Master
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