MCP23S17 Microchip Technology, MCP23S17 Datasheet - Page 7

• Manufacturer Part Number: MCP23S17
• Description: 16-Bit I/O Expander with Serial Interface
• Manufacturer: Microchip Technology

FIGURE 1-1:
© 2007 Microchip Technology Inc.
SR
w
S
P
R
ADDR
D
D
OP
OUT
IN
- Start
- Restart
- Stop
- Read
- Write
- Data out from MCP23017
- Data in to MCP23017
- Device opcode
- Device register address
Sequential
Sequential
Byte
Byte
MCP23017 I
S
S
S
S
S
S
OP
OP
OP
OP
OP
OP
2
C™ DEVICE PROTOCOL
W
R
W
W
W
W
ADDR
Byte and Sequential Write
Byte and Sequential Read
ADDR
ADDR
SR
SR
SR
OP
OP
MCP23017/MCP23S17
OP
SR
SR
P
SR
D
P
R
R
D
IN
OUT
D
D
W
OP
OP
IN
IN
OP
D
D
....
OUT
OUT
ADDR
....
....
R
W
R
D
....
D
IN
OUT
D
D
D
D
P
OUT
IN
D
IN
OUT
P
D
IN
OUT
....
....
....
....
P
P
D
D
D
OUT
D
P
IN
OUT
IN
P
DS21952B-page 7
P
P
P
P