MCP23016 查看數據表（PDF） - Microchip Technology
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MCP23016 Datasheet PDF : 38 Pages
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MCP23016
1.7.1 DATA PORT REGISTERS
Two registers provide access to the two GPIO ports:
• GP0 (provides access to data port GP0)
• GP1 (provides access to data port GP1)
A read from this register provides status on pins of
these ports. A write to these registers will modify the
output latch registers (OLAT0, OLAT1) and data output.
REGISTER 1-1: GP0 - GENERAL PURPOSE I/O PORT REGISTER 0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
GP0.7 GP0.6 GP0.5 GP0.4 GP0.3 GP0.2
bit 7
R/W-0
GP0.1
R/W-0
GP0.0
bit 0
bit 7-0
GP0.0:GP0.7: Reflects the logic level on the pins.
1 = Logic ‘1’
0 = Logic ‘0’
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
REGISTER 1-2: GP1 - GENERAL PURPOSE I/O PORT REGISTER 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
GP1.7 GP1.6 GP1.5 GP1.4 GP1.3 GP1.2
bit 7
R/W-0
GP1.1
R/W-0
GP1.0
bit 0
bit 7-0
GP1.0:GP1.7: Reflects the logic level on the pins.
1 = Logic ‘1’
0 = Logic ‘0’
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
DS20090C-page 6
© 2007 Microchip Technology Inc.
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