MCP23S18数据手册集成电路（IC）的I/O扩展器规格书PDF

描述 Description

The MCP23X18 device provides 16-bit, general purpose parallel I/O expansion for I2C bus or SPI applications. The two devices differ only in the serial interface.
• MCP23018 - I2C interface
• MCP23S18 - SPI interface The MCP23X18 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 register can be inverted with the polarity inversion register. All registers can be read by the system master.

特性 Features

16-bit remote bidirectional I/O port
Open-drain outputs:
5.5V tolerant
25 mA sink
400 mA total current out
Low standby current as low as 1 µA
High-speed I2C™ interface up to 3.4MHz
Single hardware address pin: Voltage input to allow up to eight devices on the bus
Configurable interrupt output pins: Configurable as active-high, active-low or open-drain
Low standby current:1 µA (typ.)

简介

MCP23S18属于集成电路（IC）的I/O扩展器。由制造生产的MCP23S18I/O 扩展器该系列器件可与微控制器、微处理器或类似器件结合使用，目的是增加可用于连接外设的信号连接数量。典型的工作概念涉及使用串行通信，只需主机设备上的几根 I/O 线，即可读/写扩展器设备上的许多输入/输出引脚的状态。该技术的通信速度不佳，但连通性较高，最适合快速响应不是很关键的应用，例如许多人机界面应用。