MCP23016 查看數據表（PDF） - Microchip Technology
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MCP23016 Datasheet PDF : 38 Pages
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MCP23016
1.7.3 INPUT POLARITY REGISTERS
These registers allow the user to configure the polarity
of the input port data (GP0 and GP1). If a bit in this reg-
ister is set, the corresponding input port (GPn) data bit
polarity will be inverted.
• IPOL0 (controls the polarity of GP0)
• IPOL1 (controls the polarity of GP1)
REGISTER 1-5: IPOL0 - INPUT POLARITY PORT REGISTER 0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
IGP0.7 IGP0.6 IGP0.5 IGP0.4 IGP0.3 IGP0.2
bit 7
R/W-0
IGP0.1
R/W-0
IGP0.0
bit 0
bit 7-0
IGP0.0:IGP0.7: Controls the polarity inversion for the input pins
1 = Corresponding GP0 bit is inverted
0 = Corresponding GP0 bit is not inverted
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 1-6: IPOL1 - INPUT POLARITY PORT REGISTER 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
IGP1.7 IGP1.6 IGP1.6 IGP1.4 IGP1.3 IGP1.2
bit 7
R/W-0
IGP1.1
R/W-0
IGP1.0
bit 0
bit 7-0
IGP1.0:IGP1.7: Controls the polarity inversion for the input pins
1 = Corresponding GP1 bit is inverted
0 = Corresponding GP1 bit is not inverted
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 8
© 2007 Microchip Technology Inc.
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