AN2423 STMPE2401 -端口扩展键盘控制器

AN2423 STMPE2401 -端口扩展键盘控制器

AN2423
Application note
STMPE2401 - Port expander
keypad controller

Introduction
STMPE2401 is the first in the family of STMicroelectronic’s expander logic products. The
principle of a basic expander logic is the provision of additional I/Os that can be used by the
host processor to implement additional features such as expanding the number of control
signals and mixed signal lines or controlling numerous peripherals.
In addition to t