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Detailed Explanation of 51 Single Chip Microcomputer Function, Function and Manufacturer's Single Pr

As one of the oldest single chip microcomputer, 51 single chip microcomputer has played a very important role in all walks of life.

Function of 51 single chip microcomputer

Before the 32-bit arm, embedded applications such as aerospace, 51 single chip microcomputer is the most important controller. In other fields, especially civil products, 51 single chip microcomputer has penetrated into all aspects. In industrial control, it can be said that 51 single chip microcomputer occupies most of the sky. Even now, 51 single chip microcomputer also plays an important role, especially in small control system. Because 51 single chip microcomputer has the relationship between data bus and address bus, 8-bit single chip microcomputer has unparalleled advantages.

Main functions of 51 single chip microcomputer

The main functions of 51 single chip microcomputer include:

·8-bit CPU · 4kbytes program memory (ROM) (8K for 52)

·256 bytes of data memory (RAM) (52 384 bytes of RAM)

·32 I / O port lines · 111 instructions, most of which are single byte instructions

·2 programmable timing / counters · 5 interrupt sources, 2 priorities (6 out of 52)

·A full duplex serial communication port

·The addressing space of external data memory is 64KB

·The addressing space of external program memory is 64KB

·Logical operation bit addressing function · dual inline 40pindip package

·Single 5V power supply

CPU: it is composed of operation and control logic, and also includes interrupt system and some external special function registers;

Ram: used to store data that can be read and written, such as intermediate results, final results and data to be displayed;

ROM: used to store programs, some original data and tables;

I / O port: four 8-bit parallel I / O ports, which can be used as input and output;

T / C: two timing / counter, which can work in both timing mode and counting mode;

Interrupt control system with five interrupt sources;

A full duplex UART (Universal Asynchronous Receiver Transmitter) serial I / O port is used to realize the serial communication between single-chip computers or between single-chip computers and microcomputers;

On chip oscillator and clock generation circuit, quartz crystal and fine tuning capacitor need to be connected externally. The maximum oscillation frequency is 12m.

51 single chip microcomputer related manufacturers and products

Arm series single chip microcomputer

AVR series (ATMEL)

ATMEL at91 series (ARM processor, etc.)

AT90 series AVR (ATMEL's high performance RISC 8-bit MCU, old product)

Atmega series AVR (ATMEL's high performance RISC 8-bit MCU, new product)

Atxmega series AVR (ATMEL's high performance RISC 32-bit MCU, new product)

ATMEL AT89 series (Intel 8051 / MCS51 architecture 8-bit MCU)

MARC4

Cypress Microsystems

Freescale Semiconductor

8-bit

16-bit

32-bit

MPC500

Holtek (shengqun semiconductor)

HT48FXX Flash I/O type

HT48RXX I/O type

HT46RXX A/D type

HT49RXX LCD type

Intel

8-bit

8XC42

MCS48

Mcs51: Intel 8051 series has a long history, many compatible products and is widely used

8xC251

16-bit

MCS96 series

MXS296

32-bit

i960

PIC MCU series of microchip

32bit: PIC32 (MIPs m4k core architecture is adopted)

National Semiconductor

COP8

CR16

NEC

78K

NXP semiconductor

LPC2000

LPC900

LPC700

BASIC Stamp

Renesas Technology Series MCU

Renesas 16-bits

Renesas M16C Series

Renesas M32C Series

Renesas R8C Series

Renesas M16C/TIny Series

Renesas R8C/TIny Series

Renesas H8/TIny Series

Italian French semiconductor

STM32 series (arm Cortex-M3 series, 32-bit)

Stm8 series (autonomous RISC instruction set, 8 bits)

Syncmos Xinmao international technology full series single chip microcomputer

Padauk Yingguang technology full series single chip microcomputer (multi-core single chip microcomputer)

P201CS/CD 8-bits

P211CS/CD 8-bits

p232CS/CD 8-bits

P234CS/CD 8-bits

ZiLOG

Z8

Z86E02

STC macro crystal series single chip microcomputer

Stc89c series 6t / 12t enhanced single chip microcomputer (Intel 8051 architecture with external bus)

Stc11f / 11L series 2T enhanced single chip microcomputer (Intel 8051 enhanced architecture, no external bus program support)

Stc12c / 12le series 2T enhanced single chip microcomputer (Intel 8051 enhanced architecture, no external bus program support)

Stc15c / 15le series 2T enhanced single chip microcomputer (Intel 8051 enhanced architecture, no external bus program support, under development)

Kernel IC Huaxin single chip microcomputer LS series

Lsx051 series 12t dual core single chip microcomputer (Intel 8051 architecture, no external bus)

Lsx151 series 12t three core single chip microcomputer (Intel 8051 architecture, no external bus)

Ls052a series 6T three core single chip microcomputer (Intel 8051 architecture, no external bus)

Other series of MCU

MSP430 series single chip microcomputer

8098, 80196 series single chip microcomputer

At8p5x series single chip microcomputer

Czg8000 series single chip microcomputer

Detailed Explanation of 51 Single Chip Microcomputer Function, Function and Manufacturer's Single Pr 1

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Among them, the small X box can only use the touch pointer function, and even the click function can not be used. The other box can't even use the mouse pointer. Finally, only a few boxes can be well compatible with pointer touch and keyboard functions, but they can't use their own physical keyboard keys during text input, which is somewhat frustrating.Pconline evaluation room summary:BenQ ke920 can be said to skillfully combine the function of touch pad in the keyboard, and does not sacrifice volume or key position. However, its touch pad is more suitable for PC at present. The compatibility in the current Android box is still worth observing. The main reason for this is that the box manufacturer is not enough to optimize the software, or even suspected of over simplification.
Functions and Functions of Keys on Computer Keyboard
Functions and Functions of Keys on Computer Keyboard
Caps lock key: caps lock key. English is the abbreviation of capital lock. Used to input more uppercase English characters. It is a looping key, and then press it again to return to lowercase. When it is started to uppercase, the caps lock indicator on the keyboard will be on. Note that the Chinese input method is invalid when it is in uppercase.ESC key: exit key. The abbreviation of escape in English means escape, exit, etc. in Chinese. In computer applications, the main function is to exit a program. For example, if we want to back out when playing a game, we just press this key.Tab key: table key. Maybe we use this key less. It is the abbreviation of table, which means table in Chinese. The application in computer mainly plays the role of equal distance movement in word processing software (such as word). For example, when we are processing a table, we don't need to use the space bar to move grid by grid. Just press this key to move equidistantly, so we call it the table key.Shift key: conversion key. English means "conversion". It is used to convert case or upper character keys, and can also work together with other keys. For example, to enter the @, press Shift 2 in English.CTRL key: control key. English is the abbreviation of control, and Chinese means control. It needs to be used with other keys or mouse. For example, when we use the mouse in windows, we can select multiple discontinuous objects.Alt key: optional key. English is alternative, which means optional. It needs to be used with other keys to achieve a certain operation purpose. For example, to warm up your computer, you can press Ctrl Alt Del to finish.Enter key: Enter key, which means "enter" in English. It is the most used key, so it is designed into a larger key on the keyboard, like the shape of a pistol, which is convenient to hit the key with your little finger. The main function is to execute a command, which is the function of line feed in word processing software.F1 F12 keys: function keys. Function in English means "function" in Chinese. In different software, it plays the role of corresponding functions defined for it, and can also work with other keys. For example, pressing F1 in common software is a help function.Print screen / sys RQ key: print screen key or print screen key. Is to capture the screen. After pressing, the display content of the current screen will be saved in the clipboard. You can print the content on the screen.Scroll lock key: screen scroll lock. You can lock the scroll bar. Scroll lock was very useful in the DOS period. Due to the display technology at that time, the screen can only display 80 characters wide and 25 lines long. When reading documents, it is very convenient to use this key to scroll the page. With the development of technology, the role of scroll lock is becoming smaller and smaller after entering the windows era, but it is still useful in Excel: if you use the page turning key (such as page up and page down) when scroll lock is turned off, the selected cell area will move accordingly; Conversely, if you want to scroll without changing the selected cells, just press scroll lock.Pause break key: pause key. Pause an action or program. For example, pause printing. You can abort the execution of some programs, especially DOS programs. For the self-test display of DOS interface before entering the operating system, press pause break to pause the information scrolling, and then press any key to continue. Press the windows Flag pause / break under windows to call out the system propertiesInsert key: insert key. It is mainly used to insert characters in text editing. It is a cycle key, and then press it again to change to the rewriting state.Delete key: same as del key, delete key. It mainly deletes selected files or contents in windows or text editing software.Home key: Home key. English home means home in Chinese, that is, the original position. In the text editing software, locate the starting position of the line. Use with Ctrl to navigate to the beginning of the article.End key: end key. English end means end and ending in Chinese. In text editing software, locate at the end of the line. Echo with the home key. Use with Ctrl to navigate to the end of the article.Pageup key: page up key. Page, meaning of page; Up means up. Page up the content in the software.Pagedown key: page down key. Page means page, down means down. Echo with the pageup key.Num lock key: press the digital (keypad) lock key. The first light in the upper right corner is on, indicating that the keypad can be used, and then press the light off, indicating that the keypad is not available.
Functions of Computer Keyboard
Functions of Computer Keyboard
Keyboard is an instruction and data input device used to operate equipment. It also refers to a group of function keys (such as typewriter and computer keyboard) arranged by the system to operate a machine or equipment. The keyboard is also a part of the keyboard instrument. It can also refer to the instrument using the keyboard, such as piano, digital piano or electronic piano. The keyboard is helpful to practice typing.ESC key - exit key. English abbreviation for escape. The main function is to exit a program. If we want to exit a program, just press this key. Generally, exit the full screen mode without closing the program;F1 F12 - function key. English function means "function" in Chinese. In different software, it plays the role of corresponding functions defined for it, and can also work with other keys. For example, pressing F1 in common software is a help function.Prtsc (PrintScreen) / sysrq (systemrequest) key - print screen key or print screen key. Is to capture the screen. After pressing, the display content of the current screen will be saved in the clipboard. You can print the content on the screen.Numlk (NumLock) - press the number (keypad) lock key. The first light in the upper right corner is on, indicating that the keypad can be used, and then press the light off, indicating that the keypad is not available. In a notebook, you usually press FN first and then numlk.Pausebreak key - pause key. Pause an action or program. For example, pause printing. You can abort the execution of some programs, especially DOS programs. Press pausebreak to pause the information scrolling of the self-test display on the DOS interface before entering the operating system, and then press any key to continue. Under windows, press the windows Flag pause / break to call out the system properties. Maybe different systems have different functions. It is possible to open the save file dialog box.Alt key - optional key. English is alternative, which means optional. It needs to be used with other keys to achieve a certain operation purpose. For example, to warm up your computer, you can press Ctrl Alt Del to finish.Role of ALT letter combinationsAlt u open account, ALT F open file menu, ALT v open view menu, ALT O open Favorites menu, ALT t open tools menu.Insert (insert) key - insert key. It is mainly used to insert characters in text editing. It is a cycle key, and then press it again to change to the rewriting state. (convert between overwrite and non overwrite)Del (delete key) - delete key. It mainly deletes selected files or contents in windows or text editing software.PgDn (pagedown key) - page down key.Shift key - conversion key. English means "conversion". It is used to convert case or upper character keys, and can also work together with other keys. For example, to enter the @, press Shift 2 in English.Shift key combinationShift delete permanent deletion, shift Tab reverse selection, shift Ctrl input method switching;Shift numbers: displays the punctuation marks above the numbers.End key -- end key. English end means end and ending in Chinese. In text editing software, locate at the end of the line. Echo with the home key. Use with Ctrl to navigate to the end of the articleCTRL key - control key. English is the abbreviation of control, and Chinese means control. It needs to be used with other keys or mouse. For example, when we use the mouse in windows, we can select multiple discontinuous objects.Home key - Home key. English home means home in Chinese, that is, the original position. In the text editing software, locate the starting position of the line. Use with Ctrl to navigate to the beginning of the article.The functions of those English word keys on the keyboardPrtscsysrq screen capture key, end displays the bottom of the current window, and home displays the top of the current window;NumLock numeric keypad switch, delete, pageup up, pagedown;Capslock letter case.Tab key - table key. Maybe we use this key less. It is the abbreviation of table, which means table in Chinese. The application in computer mainly plays the role of equal distance movement in word processing software (such as word). For example, when we are processing a table, we don't need to use the space bar to move grid by grid. Just press this key to move equidistantly, so we call it the table key.PgUp -- page up.Capslock key - capital letter lock key. English is the abbreviation of capital lock. Used to input more uppercase English characters. It is a looping key, and then press it again to return to lowercase. When it is started to uppercase, the capslock indicator on the keyboard will be on. Note that the Chinese input method is invalid when it is in uppercase.Enter - enter, which means "enter" in English. It is the most used key, so it is designed into a larger key on the keyboard, like the shape of a pistol, which is convenient to hit the key with your little finger. The main function is to execute a command, which is the function of line feed in word processing software.Windows key - the most basic function of win key is to open the "start" menu. It can be combined with many other keys and has a variety of functions.
Huakelon Five USB PD Fast Charging Chargers: with Digital Display Function, Which Have Passed CCC Ce
Huakelon Five USB PD Fast Charging Chargers: with Digital Display Function, Which Have Passed CCC Ce
According to the statistics of charging head network, at present, there are 9 iPhone models supporting USB PD fast charging, and apple began to form a strong camp on USB PD fast charging. However, apple only provides two of the standard 18W fast charging packages for iPhones. If many other iPhones need to obtain the fast charging function, they must buy extra, which provides a broad development space for third-party fast charging charger manufacturers.As a manufacturer specializing in the production of digital peripheral products such as chargers, mobile power supplies and power adapters, Shenzhen huakelong Electronics Co., Ltd. has launched five new USB PD fast charging chargers for the small and medium-sized power fast charging market, with power levels of 18W, 24W and 30W. At the same time, there are also two different interface specifications of usb-c port and 1a1c, It can fully meet the needs of users to upgrade original mobile phone accessories.It is worth mentioning that huacologne has rich development experience in digital display chargers, and has continued to develop a variety of products with digital display function in view of this differentiated market, so that some fever level users can understand the charging state of the equipment in real time and make up for the differentiated market.1、 Huacologne 18W 1a1c digital display fast charging charger hkl-usb57Huacologne 18W 1a1c digital display fast charging charger adopts PC flame retardant shell with size of 53 * 53 * 29mm. The shell surface is treated with bright baking paint, which is very smooth; The input is a folding pin, which supports 100-240V 50 / 60Hz 0.5A input. The output end is equipped with a usb-a interface and a usb-c interface, which support the maximum 18W fast charging output. It is compatible with USB PD, qc3.0, qc2.0 and other fast charging protocols, and can realize fast charging for mobile phones and tablets of Huawei, Xiaomi, Samsung and other brands.The charger output panel is equipped with an LED display screen, so that users can observe the charging voltage and current of the equipment in real time. In addition, the charger has eight safety protection, which can effectively filter dangerous current and voltage to ensure charging safety.2、 Huacologne 18W 1a1c digital display charger hkl-usb57sHuacologne 18W 1a1c digital display charger hkl-usb57s also adopts PC flame retardant shell, with round shape and folding pins for convenient storage. The output terminal is configured with 1a1c interface, and is equipped with an LED display screen, which can display charging voltage and current. Input: 100-240V 50 / 60Hz 0.5A; The usb-c interface supports pd3.0 fast charging output and has three voltage gears of 5V / 3a, 9V / 2a and 12V / 1.5A. The usb-c interface qc3.0 output supports three groups of standard voltages of 5V / 3a, 9V / 2a and 12V / 1.5A.It is worth mentioning that on the basis of PD and QC protocols, the charger also adds support for Huawei FCP, SCP, vooc, AFC and other protocols, with better compatibility, and meets the fast charging needs of mainstream brand mobile phones such as Huawei, Xiaomi, Samsung and oppo.3、 Huacologne 30W 1a1c fast charging charger hkl-usb67Huacologne 30W 1a1c fast charging charger hkl-usb67 adopts a round shell with a size of 58 * 57 * 26.5mm. Color and surface treatment process can be customized according to customer needs. The input is equipped with folding pins to support 100-240V global voltage. The usb-c interface at the output end supports USB PD fast charging, with a maximum power of 30W, and has five complete voltage gears of 5V / 3a, 9V / 2.6a, 12V / 2.5A, 15V / 2a and 20V / 1.5A, which can meet the charger requirements of different devices such as mobile phones, apples, mobile power supplies and low-power laptops.The usb-a interface supports the usb-a interface, supports the maximum 24W power, and is compatible with qc3.0, qc2.0, FCP, SCP, vooc, AFC and other fast charging protocols; Built in multiple protection functions, charging is more efficient and safer. At the same time, the output terminal is equipped with LED display screen, which can display the charging voltage and current in real time.4、 Huacologne 24W 1a1c charger hkl-usb56The hkl-usb56 charger of huacologne uses a white shell made of PC flame retardant material, and the body shell adopts a bright paint baking process. The side transition is round, and the whole is smooth and feels good; The body size is 53 * 53 * 29mm, small and mini, easy to carry out. The input pin specifications can be customized, and the output top surface is equipped with 1a1c two output interfaces.The dual ports of the charger support qc3.0 and PD fast charging protocols respectively, and the maximum output power of a single port is 24W; Dual port can output at the same time to meet the charger requirements of two devices; The charger uses the imported original PD chip and the official fast charging cable, which can greatly improve the charging speed.5、 Huacologne 18W USB PD fast charging charger hkl-usb66Huacologne 18W USB PD fast charging charger hkl-usb66 uses PC flame retardant material shell, and the color can be customized according to customer needs. The main body of the body adopts bright paint baking process, and the output top surface is matte. The side is transitional and round, and the whole is smooth and feels good. The product size is only 41 * 26 * 61mm, and the shape is small. Watermark can be put into the bag. The input pin specifications also support customization, and the top surface of the output is equipped with a usb-c interface.The maximum output power of the charger is 18W, which can automatically identify three groups of different voltages and currents: 5V / 3a, 9V / 2a and 12V / 1.5A. It is specially designed for iPhone 11 series; With the fast charging cable, it can charge about 50% of the iPhone XS in half an hour. In addition, it also supports the fast charging of iPad; It can intelligently identify voltage and current, and select appropriate charging power for the equipment without damaging the battery; It has multiple safety protection measures such as overvoltage protection, temperature protection and short circuit protection.At present, the above five new products launched by huacologne have passed the national CCC certification to facilitate e-commerce OEM / ODM and accelerate the listing of products on jd.com, tmall.com and other platforms.
What to Do About Milk in Keyboard?
What to Do About Milk in Keyboard?
What to do about milk in keyboard?If the spare keyboard is PS2 instead of USB, (Round plug in instead of flat), you may need to turn your computer off, plug in the keyboard, and then turn the computer back on. If the spare keyboard is USB, try plugging it into another USB port. When you first turn the computer on with the spare keyboard, can you turn the Num Lock off and on (Does the light go off and on when doing so?) If that works, the keyboard is working, but may need a driver in Windows. Most keyboards should be found and have basic functionality automatically. Some with special buttons will not work 100% until a driver is loaded------How to build a keyboardCould you prototype it by using some of the keys on a conventional keyboard and trying out the drivers you will need to write. That way all the electronics to scan the keypresses is in place & if you like it you can take it to the next level------parts of my keyboard aren't working! :(?it's either too much dust inside or you/someone spilled something on the keyboard------How can you clean off a white keyboard without hurting the computer?First, DISCONNECT THE KEYBOARD. No power to the system, remove the battery. Get a suction tool and clean the dust out from under the keys with a vacuum cleaner. Now moisten a cloth with your cleaning fluid, but not to the point where it's easy to squeeze drops from it. I would try rubbing alcohol, or fourmula 409. Wipe the frame around the keys. Consider using a Qtip swab on the skinny bars between the rows of keys if there are any. Let the whole thing air dry for an hour or two before using it again, just to make sure that any moisture has evaporated.------Past keyboard instrumentsFarfisa Organ Hohner Pianet Oberheim Synths Roland Synths Mini-Moog Synth Baldwin Acoustic Grand Kurzweil Digital Piano------Bit-paired keyboardA bit-paired keyboard is a keyboard where the layout of shifted keys corresponds to columns in the ASCII (1963) table, archetypally the Teletype Model 33 (1963) keyboard. This was later contrasted with a typewriter-paired keyboard, where the layout of shifted keys corresponds to electric typewriter layouts, notably the IBM Selectric (1961). The difference is most visible in the digits row (top row): compared with mechanical typewriters, bit-paired keyboards remove the _ character from 6 and shift the remaining &*() from 7890 to 6789, An important subtlety is that ASCII was based on mechanical typewriters, but electric typewriters became popular during the same period that ASCII was adopted, and made their own changes to layout. Thus differences between bit-paired and (electric) typewriter-paired keyboards are due to the differences of both of these from earlier mechanical typewriters. Bit-paired keyboards were common in the United States in the 1960s and 1970s, due to ease of manufacture, but died out in the late 1970s with office automation, due to the number of users already accustomed to (electric) typewriter layouts. Bit-paired keyboard layouts survive today only in the standard Japanese keyboard layout, which has all shifted values of digits in the bit-paired layout.------keyboard input stopped being accepted after loginI would start with any apps or utilities that might intercept USB devices. I once had a forgotten keyboard tool that was used to alter mapping of command and option keys that was not compatible with a system update and caused a similar problem. USB Overdrive? Keyboard macros? Virtual machine apps? Any similar things could be capturing the USB input from the keyboard and failing to pass to the OS.------What can i use to clean my laptop screen and keyboard?dont use any vinegar or alcohol not even mixed with water after a few times of using this your screen and any plastics can be destroyed!!! i recommend using organic vegetable cleaner... (spray bottle kind) you can find it at most stores and its cheaper than laptop cleaner and works twice as good, when you use it spray it on a nice towel wash some water thru that and ring it out then use that to clean any spot on the screen.. then dry it with the dry part of the towel. . anything (dust lint) the towel leaves behind use a micro fiber cleaning cloth to clean up (they only cost a dollar or two) (really fine quality).. plus it has nothing in it that can harm the screen... and for the keyboard use an air duster and if u have to use water put it on a qutip and dry it up if any water drops fall onto or in the keyboard.
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