TC7135与PIC16C6X单片机的二线式接口

针对TC7135并行接口输出,占用较多的I/O口资源,电路连接较复杂的缺点,提出了一种TC7135和PIC单片机的二线式接口,并根据TC7135的BUSY信号的高电平时间与模拟量成正比和PIC单片机外部中断沿可编程的特性,通过编写适当的软件实现了该接口,同时给出了电路图以及接口程序,源程序已调试通过。实践证明,该接口工作稳定,可以应用在一般的单片机系统中。

The Two-Wire-Interface Between TC7135 and PIC16C6X

In order to overcome the shortcoming that parallel interface output to TC7135 takes up more I/Os and the circuit is complicated, we propose a Two-Wire-Interface between TC7135 and PIC16C6X. According to the direct ratio of the BUSY signal of the TC7135 to the analog signal and the programmable characteristic of PIC interrupt, we realized the interface by a suitable program. Then we show the principle of the Two-Wire-Interface between TC7135 and PIC16C6X, give out the electric circuit diagram and the program. The source list has already been passed. It is proved in practise that this interface is steady and can be used in usual MCU systems.