MCP23S17-E/SO Microchip Technology Inc., MCP23S17-E/SO Datasheet - Page 13

• Manufacturer Part Number: MCP23S17-E/SO
• Description: I/O Port Expander, 16-Bit, SPI I'face, SOIC-28
• Manufacturer: Microchip Technology Inc.
• Type: Programmable Peripheral Interfacer

Specifications of MCP23S17-E/SO

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

1.6.2
This register allows the user to configure the polarity on
the corresponding GPIO port bits.
If a bit is set, the corresponding GPIO register bit will
reflect the inverted value on the pin.
REGISTER 1-2:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-0
IP7
INPUT POLARITY REGISTER
IP7:IP0: These bits control the polarity inversion of the input pins <7:0>
1 = GPIO register bit will reflect the opposite logic state of the input pin.
0 = GPIO register bit will reflect the same logic state of the input pin.
R/W-0
IP6
IPOL – INPUT POLARITY PORT REGISTER (ADDR 0x01)
W = Writable bit
‘1’ = Bit is set
R/W-0
IP5
R/W-0
IP4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
MCP23017/MCP23S17
R/W-0
IP3
R/W-0
IP2
x = Bit is unknown
R/W-0
IP1
DS21952B-page 13
R/W-0
IP0
bit 0