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MAX7312AWG

更新时间： 2024-01-01 09:27:42

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
17页	373K
描述
2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection

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技术参数
数据手册

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MAX7312AWG 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	,
Reach Compliance Code：	compliant	Factory Lead Time：	6 weeks
风险等级：	5.72	峰值回流温度（摄氏度）：	NOT SPECIFIED
处于峰值回流温度下的最长时间：	NOT SPECIFIED	uPs/uCs/外围集成电路类型：	PARALLEL IO PORT, GENERAL PURPOSE
Base Number Matches：	1

MAX7312AWG 数据手册

2-Wire-Interfaced 16-Bit I/O Port Expander

with Interrupt and Hot-Insertion Protection

I/O0

I/O1

I/O2

I/O3

I/O4

I/O5

I/O6

I/O7

AD0

AD1

AD2

8 BIT

INPUT/OUTPUT

PORT 1

WRITE PULSE

READ PULSE

SMBus

CONTROL

SCL

SDA

INPUT

FILTER

I/O8

I/O9

8 BIT

I/O10

I/O11

I/O12

I/O13

I/O14

I/O15

INPUT/OUTPUT

PORT 2

WRITE PULSE

READ PULSE

V⁺

INT

POWER-ON

RESET

MAX7312

GND

Figure 1. MAX7312 Block Diagram

SDA

BUF

SU, STA

SU, DAT

HD, STA

LOW

SU, STO

HD, DAT

SCL

HIGH

HD, STA

REPEATED START CONDITION

START CONDITION

STOP CONDITION START CONDITION

Figure 2. 2-Wire Serial Interface Timing Diagram

Detailed Description

Serial Interface

The MAX7312 general-purpose input/output (GPIO)

peripheral provides up to 16 I/O ports, controlled

Serial Addressing

The MAX7312 operates as a slave that sends and

receives data through a 2-wire interface. The interface

uses a serial data line (SDA) and a serial clock line

(SCL) to achieve bidirectional communication between

master(s) and slave(s). A master, typically a microcon-

troller, initiates all data transfers to and from the

MAX7312, and generates the SCL clock that synchro-

nizes the data transfer (Figure 2).

through an I C-compatible serial interface. The

MAX7312 consists of input port registers, output port

registers, polarity inversion registers, configuration reg-

isters, and a bus-timeout register. Upon power-on, all

I/O lines are set as inputs. Three slave ID address select

pins, AD0, AD1, and AD2, choose one of 64 slave ID

addresses, including the eight addresses supported by

the Phillips PCA9555. Table 1 is the register address

table. Tables 2–6 show detailed register information.

_______________________________________________________________________________________

1...3 4 567 8 9...17

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