Serial communication schematic and PCB diagram between MCU and computer

The IO port is the most basic component for the processor system to communicate with the outside world. From basic keyboards and LEDs to complex peripheral chips, they are all read or controlled through the input and output operations of the IO port. In the MSP430 series, different microcontrollers have different numb

/*Temperature sensor Using Tianxiang temperature conversion module algorithm Download address of the complete version of the program: http://www.51hei.com/f/ds1820pic.rar */ #include __CONFIG(0X3B31); #define uint unsigned int #define uchar unsigned char #define DQ RC1 #define DQ_DIR TRISC1 #de

Computer RS232 serial port is a very common communication interface, and has always played an extremely important role in industry and scientific research. In addition to simple serial port communication, many users have developed a wide variety of expansion products with a wide range of uses on the serial port, suc

0 Introduction Single-chip microcomputers are small in size, light in weight, highly flexible, and inexpensive, so they are increasingly widely used. Among them, the 8051/8052 chips launched by In2ter are the most basic, popular, and commonly used. 8051/8052 is widely used in small and medium-sized development

When I was learning about 51 MCU interrupts, I was often confused by external interrupts, timers/counters, and serial ports. I was originally a primary school student, how could I stand the torture! ! ! I have nothing to do, so I wrote this today to introduce and explain the external interrupts INT0 and INT1. I will

Hardware: STC89C52RC Development tool: Keil uVision4      For those who are new to microcontrollers, the application of timers/counters may be confusing, especially the calculation of initial values ​​and the selection of various timing methods. The following hopefully will give you a clear idea. Timer: Generally us

The schematic diagram of the 4×4 column keyboard of this example is shown in FIG1 . During output, the lower 4 bits of port C are used to display the input value of the key. Figure 1 External power-on reset circuit The clock circuit and reset circuit of the single-chip microcomputer can adopt the circuit shown in

1. Logically speaking, the load current of a thing should be the current it supplies to the outside. At this time, that is, when it flows out, it should be positive. 2. The external resistor is usually pulled up. Usually, when this connection method outputs a high level, the internal output switch tube is in the cut