23017 datasheet(13/48 Pages) MICROCHIP

Nome de Peças	23017

Descrição Electrónicos	16-Bit I/O Expander with Serial Interface

PDF	48 Pages

Scroll/Zoom	100%

Fabricante Electrônico	MICROCHIP [Microchip Technology]

Página de início	http://www.microchip.com

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13 / 48 page

DS21952B-page 13

MCP23017/MCP23S17

1.6.2

INPUT POLARITY REGISTER

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.

IPOL – INPUT POLARITY PORT REGISTER (ADDR 0x01)

R/W-0

IP7

IP6

IP5

IP4

IP3

IP2

IP1

IP0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-0

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.

23017 Folha de dados(PDF) 13 Page - Microchip Technology