MCP23S18T-E/MJ Microchip Technology, MCP23S18T-E/MJ Datasheet - Page 19

• Manufacturer Part Number: MCP23S18T-E/MJ
• Description: 16-bit Input/Output Expander, I2C Interface, Pb-free 24 QFN 4x4mm T/R
• Manufacturer: Microchip Technology

Specifications of MCP23S18T-E/MJ

• Interface: SPI
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 10MHz
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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 1-4:
© 2008 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: Controls 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
W = Writable bit
‘1’ = Bit is set
R/W-0
IP5
R/W-0
IP4
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
MCP23018/MCP23S18
R/W-0
IP3
R/W-0
IP2
x = Bit is unknown
R/W-0
IP1
DS22103A-page 19
R/W-0
IP0
bit 0