invented computer chip

First, the concept of single-chip microcomputer, application.Microcontroller is also called MCU (microcontroller).is aIC Chip, is the use ofLarge scale integrated circuittechnology that has the ability to process dataCpuCPU,Random memoryRAM,Read-only memory rom, multiple I/O ports, andInterrupt System,Timer/Counter and other functions (may also include a display driver circuit,Pulse width modulationcircuit,

are parity bits (1/0). The sum of the number of 1 in the data and the number of the test bit 1 should be odd at parity, and the number of 1 in the data and the number of checksum digits 1 should be even when parity. When a character is received, the number of 1 is validated, and if the character is inconsistent, an error occurs during the transfer of the data. Code and checksum The sender sums the data blocks (or each byte xor), resulting in a byte of the checksum character (checksum) appended

First, the serial port download:1.MCUISP serial software One-click Download settings:DTR Low power level, RTS high entry bootload serial download on the ch340 chip corresponds to the DTR and RTS output levels contrary to the level set by the computer software. One-click Download circuit according to the ch340 chip corresponding PIN control signal to complete the

The chip has been crushed.Today the download line of the GND download line from the chip seat off, may be too tight, the line is broken. And then re-do, the result is too hard, the chip block pin broken. Now listen to a digital group of users of the proposal welding a copper wire up, it seems that can be used, but the seat to the hot bad look. Because it is not f

interrupt priority register IP (special function register). IP Register byte address bit b8h, can be bit addressable. The functions of the IP flag bits are shown in table 2:The AT89S52 interrupt system has a level two priority (the priority of each interrupt source is divided into high and low priority by the IP register), and they follow the following two basic rules:(1) A low-priority interrupt source can be interrupted by a high-priority interrupt source, and a high-priority interrupt source

pulse (it can be understood that the clock cycle is the reciprocal of the external crystal oscillator, such as 12M Crystal oscillator, its time period is 1/12 us), is the most basic computer, the smallest unit of time. Within a clock cycle, the CPU completes only one of the most basic actions. For a single chip, if the use of 1MHZ clock frequency, the clock cycle is 1us; if the 4MHZ clock frequency, the cl

LabVIEW and single-chip computer serial communicationVISA is the acronym for Virtual Instrument Software architecture (that is, Vsan Instruments software Architecture), which is essentially an I/O Port Software library and its specifications. Visa is a standard i/0 application interface for instrument programming and is an industry-ready standard API (Application interface) for instrument drivers, with obje

Wrote a half-day off the line ...Not written on the definition ...What is interrupt interrupt means that the CPU in the process of executing the current program, because of some random peripheral request or internal CPU abnormal events, so that the CPU suspends the executing program and go to execute the corresponding service handler; When the service handler finishes running, the CPU returns to the halt and resumes execution of the original program. 51 single-

Career change to engage in hardware. ACM is to go to the end, after all, electronics is their own professional characteristics.The first single-chip microcomputer, buy the board is stc89c52 (a treasure 58 of the ocean Amoy. Guo Tianxiang The new concept of the book (seems a bit not matching but live to get it also. ）Let's talk about the mistakes that are easy to make.1. The serial drive has been engaged for 1 hours. Have not been installed, then follo

);Serial initializationvoid Receivedata(void);Receive datavoidMain(void){/* Initialization: Includes timer interrupt settings,Serial port register settings, baud rate setting */ Uartinit();While(1){/* Receive the data sent by the computer and send it to the LED control port */Receivedata();}}void Uartinit(void){Tmod= 0x0f; Just change what you want to change.Tmod|= 0x20;Set timer 0 to working mode 2TL1= 0xfd;TH1= 0xfd;Set baud rate to 9600bpsSRV= 1;Al

Computer Chip Disassembly Method: 1. Shear footwork: No damage to the plate, can not be reused. 2. Mop Tin Method: In the IC feet on both sides of the welding tin, the use of high-temperature iron to drag back and forth, while the IC (easy to damage the plate, but can be preserved test IC). 3. Barbecue method: In the alcohol lamp, gas stove, electric stove on the barbecue, and so on board tin diss

Schematic diagram:Principle:Similar to the standalone keyboard/******************************************************************************** Experiment Name: Matrix Keyboard Experiment * Use of IO: Digital tube using P0 matrix keyboard Using the P3* experiment effect: Displays the key values of the standalone keyboard * Note: *******************************************************************************/#in Clude 51 single-chip