PCA9674 PCA9674A Remote 8-bit IO expander for Fm I2C-bus with interrupt
The PCA9674/74A is a drop-in upgrade for the PCF8574/74A providing higher Fast-modePlus I2C-b...
I/O输入/输出(Input/Output),分为IO设备和IO接口两个部分。在POSIX兼容的系统上,例如Linux系统[1],I/O操作可以有多种方式,比如DIO(DirectI/O),AIO(AsynchronousI/O,异步I/O),Memory-MappedI/O(内存映射I/O)等,不...
The PCA9674/74A is a drop-in upgrade for the PCF8574/74A providing higher Fast-modePlus I2C-b...
The PCA9535 and PCA9535C are 24-pin CMOS devices that provide 16 bits of GeneralPurpose paral...
随着面向应用的增加,单片机系统I/O端口数量有限的问题日益突出.根据74HC164串行输入、并行输出的工作原理,对单片机系统的I/O端口进行扩展.设计具有16个按键的中断串行键盘和具有8个数码管的串行数码管显示,用4个I/O端口完成了传统并...