MCP23018 查看數據表（PDF） - Microchip Technology

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MCP23018

16-Bit I/O Expander with Open-Drain Outputs

Microchip Technology 

MCP23018/MCP23S18

FIGURE 1-1:

MCP23018 I2C™ DEVICE PROTOCOL

S - Start

SR - Restart

P - Stop

S OP

w - Write

R - Read

OP - Device opcode

W ADDR

ADDR - Device address

DOUT - Data out from MCP23018

DIN - Data in to MCP23018

DIN .... DIN

P

SR OP R DOUT .... DOUT

P

SR OP W ADDR .... DIN

P

P

S OP R

DOUT .... DOUT

P

SR OP R DOUT .... DOUT

P

SR OP W ADDR DIN .... DIN

P

P

Byte and Sequential Write

Byte S OP W ADDR

DIN

P

Sequential S OP W ADDR

DIN .... DIN

P

Byte and Sequential Read

Byte S OP W ADDR

SR OP R DOUT

P

Sequential S OP W ADDR

SR OP R DOUT .... DOUT

P

© 2008 Microchip Technology Inc.

DS22103A-page 9

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