PIC 16F877 with 3 serial ports

Nguyên văn bởi namqn

What kind of equipment do you want to control with PIC16F877?
Is it necessary to use RS-232 serial ports? Could you use other serial protocols such as I2C, SPI?
What is the requirement of the communication speed, data rate?

Cheers,

If the other serial protocols can do the job, it is ok to use them.
the equipements are: Multimeter with serial port rs232, it can be adjusted on the following coniguration:Baud rates:9600, 4800, 2400, 1200, 300
Format: 8 bits no parỉty, or 7 bits even parity
Stop bit: Always 1