STMPE1801中文资料Xpander Logic 18-bit enhanced port expander with keypad controller数据手册ST规格书

描述 Description

The STMPE1801 is a GPIO (general purpose input/output) port expander capable of interfacing a main digital ASIC via the two-line bidirectional bus (I2C). A separate GPIO expander IC is often used in mobile multimedia platforms to resolve the problem of the limited number of GPIOs typically available on digital engines.
The STMPE1801 offers high flexibility, as each I/O can be configured as input, output, special key, keypad matrix or dedicated key function. This
device is designed to include very low quiescent current, and a wakeup feature for each I/O, to optimize the power consumption of the device. Potential applications for the STMPE1801 include portable media players, game consoles, mobile and smart phones.

特性 Features

• 18 GPIOs configurable as GPI, GPO, keypad matrix, special key or dedicated key function
• Hardware keypad controller (KPC) (10 x 8 matrix with 4 optional dedicated keys maximum)
• Interrupt output (open drain) pin
• Advanced power management system
• Programmable pull-up resistors for all GPIO pins
• ± 8 kV human body model (JESD22 A114-C)
• ± 3 kV human body model (JESD22 A114-C)

简介

STMPE1801属于集成电路（IC）的I/O扩展器。由制造生产的STMPE1801I/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。