MCP23008 查看數據表（PDF） - Microchip Technology

零件编号

产品描述 (功能)

生产厂家

MCP23008

8-Bit I/O Expander with Serial Interface

Microchip Technology 

MCP23008/MCP23S08

1.6.2 INPUT POLARITY (IPOL) REGISTER

The IPOL 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: IPOL – INPUT POLARITY PORT REGISTER (ADDR 0x01)

R/W-0

IP7

bit 7

R/W-0

IP6

R/W-0

IP5

R/W-0

IP4

R/W-0

IP3

R/W-0

IP2

R/W-0

IP1

R/W-0

IP0

bit 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

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.

© 2007 Microchip Technology Inc.

DS21919D-page 11

Share Link: