MCP23S18 Microchip Technology, MCP23S18 Datasheet - Page 9

• Manufacturer Part Number: MCP23S18
• Description: 16-Bit I/O Expander
• Manufacturer: Microchip Technology

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FIGURE 1-1:
© 2008 Microchip Technology Inc.
SR
w
S
P
R
ADDR
D
D
OP
OUT
IN
- Start
- Restart
- Stop
- Write
- Read
- Data out from MCP23018
- Data in to MCP23018
- Device opcode
- Device address
Sequential
Sequential
Byte
Byte
MCP23018 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
ADDR
ADDR
SR
SR
SR
MCP23018/MCP23S18
OP
SR
SR
P
SR
D
P
D
IN
OP
OP
OUT
D
D
W
OP
OP
IN
IN
OP
....
ADDR
....
R
R
....
R
W
R
D
D
IN
D
D
ADDR
OUT
OUT
D
OUT
D
D
P
OUT
D
IN
OUT
IN
....
....
....
....
....
P
P
D
P
D
D
OUT
OUT
D
D
P
IN
OUT
IN
DS22103A-page 9
P
P
P
P
P