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MAX7312AWG

更新时间： 2024-02-13 22:52:23

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

MAX7312 generates the acknowledge bit since the

MAX7312 is the recipient. When the MAX7312 is trans-

mitting to the master, the master generates the

acknowledge bit.

Slave address pins AD2, AD1, and AD0 choose 1 of 64

slave ID addresses (Table 7).

Data Bus Transaction

The command byte is the first byte to follow the ±-bit

device slave address during a write transmission

(Table 1, Figure 7). The command byte is used to deter-

mine which of the following registers are written or read.

Slave Address

The MAX7312 has a 7-bit-long slave address (Figure 6).

The ±th bit following the 7-bit slave address is the R/W

bit. Set this bit low for a write command and high for a

read command.

Writing to Port Registers

Transmit data to the MAX7312 by sending the device

slave address and setting the LSB to a logic zero. The

command byte is sent after the address and deter-

mines which registers receive the data following the

command byte (Figure 7).

PROGRAMMABLE

SDA

R/W ACK

MSB

LSB

Figure 6. Slave Address

Table 1. Command Byte Register

COMMAND BYTE

ADDRESS (HEX)

POWER-UP

PROTOCOL

FUNCTION

DEFAULT

0x00

0x01

0x02

0x03

0x04

0x05

0x06

0x07

0x0±

0xFF

Input port 1

Read byte

XXXX XXXX

1111 1111

0000 0000

1111 1111

0000 0001

—

Input port 2

Read byte

Output port 1

Read/write byte

—

Output port 2

Port 1 polarity inversion

Port 2 polarity inversion

Port 1 configuration

Port 2 configuration

Timeout register

Factory reserved. (Do not write to this register.)

SCL

SDA

COMMAND BYTE

PORT 1 DATA

PORT 2 DATA

SLAVE ADDRESS

R/W

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

START

CONDITION

WRITE TO PORT

DATA OUT PORT 1

READ FROM PORT 2

Figure 7. Writes to Output Registers Through Write Byte Protocol

_______________________________________________________________________________________

1...5 6 789 10 11...17

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与MAX7312AWG相关器件

型号	品牌	描述	获取价格	数据表
MAX7312AWG+T	MAXIM	2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection	获取价格
MAX7313	MAXIM	16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection	获取价格
MAX7313	ADI	16端口输入/输出扩展器，带有LED亮度控制和中断，提供热插入保护	获取价格
MAX7313_11	MAXIM	16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection	获取价格
MAX7313AEG	MAXIM	16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection	获取价格
MAX7313AEG+	MAXIM	Parallel I/O Port, 1-Bit, 16 I/O, BICMOS, PDSO24, 0.150 INCH, 0.025 INCH PITCH, MO-137AE,	获取价格

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