MCP23008-ESLASHSO datasheet(9/44 Pages) MICROCHIP

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DS21919D-page 9

MCP23008/MCP23S08

1.5

GPIO Port

The GPIO module contains the data port (GPIO),

internal pull up resistors and the Output Latches

(OLAT).

Reading the GPIO register reads the value on the port.

Reading the OLAT register only reads the OLAT, not

the actual value on the port.

Writing to the GPIO register actually causes a write to

the OLAT. Writing to the OLAT register forces the

associated output drivers to drive to the level in OLAT.

Pins configured as inputs turn off the associated output

driver and put it in high-impedance.

1.6

Configuration and Control

Registers

The Configuration and Control blocks contain the

registers as shown in Table 1-3.

TABLE 1-3:

CONFIGURATION AND CONTROL REGISTERS

Register

Name

Address

(hex)

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

POR/RST

value

IODIR

00

IO7

IO6

IO5

IO4

IO3

IO2

IO1

IO0

1111 1111

IPOL

01

IP7

IP6

IP5

IP4

IP3

IP2

IP1

IP0

0000 0000

GPINTEN

02

GPINT7

GPINT6

GPINT5

GPINT4

GPINT3

GPINT2

GPINT1

GPINT0

0000 0000

DEFVAL

03

DEF7

DEF6

DEF5

DEF4

DEF3

DEF2

DEF1

DEF0

0000 0000

INTCON

04

IOC7

IOC6

IOC5

IOC4

IOC3

IOC2

IOC1

IOC0

0000 0000

IOCON

05

—

SREAD

DISSLW

HAEN*

ODR

INTPOL

—

--00 000-

GPPU

06

PU7

PU6

PU5

PU4

PU3

PU2

PU1

PU0

0000 0000

INTF

07

INT7

INT6

INT5

INT4

INT3

INT2

INT1

INTO

0000 0000

INTCAP

08

ICP7

ICP6

ICP5

ICP4

ICP3

ICP2

ICP1

ICP0

0000 0000

GPIO

09

GP7GP6

GP5GP4

GP3GP2

GP1GP0

0000 0000

OLAT

0A

OL7

OL6

OL5

OL4

OL3

OL2

OL1

OL0

0000 0000

* Not used on the MCP23008.

Số phần tương tự - MCP23008-E/SO

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Microchip Technology	MCP23008-E/SO	498Kb / 40P	8-Bit I/O Expander with Serial Interface 2005

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nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Microchip Technology	MCP23008	498Kb / 40P	8-Bit I/O Expander with Serial Interface 2005
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