MCP23S08T-E/SS (Microchip) PDF资料下载 Datasheet(40/44 页)

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参数资料

型号：	MCP23S08T-E/SS
厂商：	Microchip Technology
文件页数：	40/44页
文件大小：	0K
描述：	IC I/O EXPANDER SPI 8B 20SSOP
标准包装：	1,600
接口：	SPI
输入/输出数：	8
中断输出：	是
频率 - 时钟：	10MHz
电源电压：	1.8 V ~ 5.5 V
工作温度：	-40°C ~ 125°C
安装类型：	表面贴装
封装/外壳：	20-SSOP（0.209"，5.30mm 宽）
供应商设备封装：	20-SSOP
包装：	带卷 (TR)
包括：	POR
配用：	GPIODM-KPLCD-ND - BOARD DEMO LCD GPIO EXP KEYPAD

2007 Microchip Technology Inc.

DS21919E-page 5

MCP23008/MCP23S08

1.0

DEVICE OVERVIEW

The MCP23X08 device provides 8-bit, general

purpose, parallel I/O expansion for I2C bus or SPI

applications. The two devices differ in the number of

hardware address pins and the serial interface:

MCP23008 – I2C interface; three address pins

MCP23S08 – SPI interface; two address pins

The MCP23X08 consists of multiple 8-bit configuration

registers for input, output and polarity selection. The

system master can enable the I/Os as either inputs or

outputs by writing the I/O configuration bits. The data

for each input or output is kept in the corresponding

Input or Output register. The polarity of the Input Port

The interrupt output can be configured to activate

under two conditions (mutually exclusive):

When

any

input

state

differs

from

its

corresponding input port register state, this is

used to indicate to the system master that an

input state has changed.

When an input state differs from a preconfigured

The Interrupt Capture register captures port values at

the time of the interrupt, thereby saving the condition

that caused the interrupt.

The Power-on Reset (POR) sets the registers to their

default values and initializes the device state machine.

The hardware address pins are used to determine the

device address.

1.1

Pin Descriptions

TABLE 1-1:

PINOUT DESCRIPTION

Pin

Name

PDIP/

SOIC

QFN

SSOP

Pin

Type

Function

SCL/SCK

Serial clock input.

SDA/SI

I/O

Serial data I/O (MCP23008)/Serial data input (MCP23S08).

A2/SO

I/O

Hardware address input (MCP23008)/

Serial data output (MCP23S08).

A2 must be biased externally.

Hardware address input. Must be biased externally.

RESET

External reset input. Must be biased externally.

NC/CS

No connect (MCP23008)/External chip select input (MCP23S08).

INT

Interrupt output. Can be configured for active-high, active-low or

open-drain.

VSS

9179

Ground.

GP0

I/O

Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or