Serial communication of single-chip microcomputer

SCM Serial Port Communication has 4 different ways:

Mode 0: Shift register Input/Output mode: Baud rate: FOSC/12;

Mode 1:10-bit UART (Universal Asynchronous Interface Circuit), the format of a frame of data is: 1-bit start bit, 8 bit data bit, 1 bit stop bit. Its baud rate is variable (by formula):

Mode 2 and Mode 3: Both methods are composed of 11-bit UART, one frame data format: 1 bit start bit, 9 bit data bit, 1 bit stop bit.

Where the baud rate of Mode 2 is fixed to: FOSC/32,FOSC/64, determined by SOMD.

The baud rate of mode 3 is the same as the mode 1.

Single-Chip microcomputer serial debugging method:

1. Single chip microcomputer + virtual terminal (as serial input device) + serial port

2. Single chip microcomputer + virtual terminal (as serial input device) +max232+ serial port

3. Single-chip computer + serial + virtual serial port program (virtual serial port) + Serial debugging assistant

4. Single-chip microcomputer +max232+ serial + virtual serial port program (virtual serial port) + Serial debugging assistant

The Compim control in Proteus should be self-charged and flat converted. (The serial port of PC is standard RS232 level, +15v or -15v; MCU is generally a +/- -5v. Usually with the Max232 conversion level after the connection)

Serial communication of single-chip microcomputer