What is W29C020 microcontroller?

W is for Winbond, and C is for memory type.

The chip has a capacity of 2M, and the programming voltage needs to be increased by 5V.

W29C020 Flash Memory, Operating Voltage;The page write cycle is less than 10 ms128 bytes per page;Read time 70 90 120ns;Data is kept for more than 10 years;The input and output are TTL level compatible;The working current is 25mA;Quiescent current 20 a;Capacity: 256k 8-bit;The byte write time is 39 s.

Single-chip microcomputer, also known as microcontroller, is a microcomputer that integrates processors, memory, timing counters (timer counters), and various input and output interfaces on an integrated circuit chip. Compared with general-purpose microprocessors used in personal computers, it emphasizes self-efficiency (without external hardware) and cost savings.

Its biggest advantage is that it is small in size and can be placed inside the instrument, but the storage capacity is small, the input and output interface is simple, and the function is low. Due to its rapid development, the definition of the old microcontroller can no longer be satisfied, so it is called a broader range of microcontrollers in many applicationsFrom the 80s of the last century, from the 4-bit and 8-bit single-chip microcomputers at that time, to the current 32-bit 300m high-speed single-chip microcomputer.

Needless to say, as soon as you look at the model, you will know that it is "Winbond single-chip microcomputer".

It's not a microcontroller, it's a CMOS flash memory.

Introduction to Programming Voltages:

EPROM (including the built-in microcontroller) has a power supply voltage when working, but it is necessary to add a higher voltage to write the program, and this higher voltage is the programming voltage.

Invented by Israeli engineer Dov Frohman, EPROM is a computer memory chip that retains data even after a power outage – that is, non-volatile (non-volatile). It is a group of floating-gate transistors that are individually programmed by an electronic device that provides a higher voltage than is commonly used in electronic circuits. Once programmed, the eprom can only be erased with strong UV irradiation.

EPROM is easily identified by a transparent window on the top of the package that can be seen on the top of the silicon wafer and is also used for UV erasure. The glass windows of the eprom can be erased by pointing them in direct sunlight for a while.

Students can use graphical programming language to create games, software, animations, stories and other works on the CodeCat platform, and exercise their logical thinking ability, task dismantling ability, interdisciplinary combination ability, aesthetic ability and teamwork ability in all aspects, and establish a solid STEAM discipline foundation.

programmer's. Is it high?

If you store it in the internal EEPROM, you won't lose it.

Generally, there is ROM or Flash inside the microcontroller

Just save it in it.

You can take a look at the datasheet of this microcontroller

Look at the address of the internal ROM or FLASH.

To use EEPROM, if the MCU has its own EEPROM inside, it is simple, if not, it can be external, the 24XX series with IIC interface and the 93XX series with SPI interface are very simple.

Microcontrollers (microcontrollers) is a kind of integrated circuit chip, which is a small and perfect microcomputer system composed of a small and perfect microcomputer system composed of a silicon wafer that uses ultra-large-scale integrated circuit technology to integrate the best processor CPU, random access RAM, read-only memory ROM, a variety of IO ports and interrupt systems, timer counters and other functions (which may also include display drive circuits, pulse width modulation circuits, analog multiplexers, AD converters and other circuits) into a silicon waferIt is widely used in the field of industrial control. From the 80s of the last century, from the 4-bit and 8-bit single-chip microcomputers at that time, to the current 300m high-speed single-chip microcomputer.

A single-chip microcomputer, also known as a single-chip microcontroller, is not a chip that completes a certain logic function, but integrates a computer system into a chip. It is equivalent to a miniature computer, and compared with a computer, the microcontroller only lacks the IO device. In a nutshell:

A chip becomes a computer. It is small in size, light in weight and cheap, which provides convenient conditions for learning, application and development. At the same time, learning to use a microcontroller is the best choice to understand the principles and structure of computers.

The use of single-chip microcomputer has been very wide, such as smart meters, real-time industrial control, communication equipment, navigation systems, household appliances, etc. Once a variety of products are used in single-chip microcomputers, they can play a role in upgrading the product, and often preceded by adjectives in front of the product name - "intelligent", such as intelligent washing machines.

As an important branch of computer development, microcontrollers can be roughly divided into general-purpose special type, bus type non-bus type and industrial control type household appliances according to the development situation.

The general-purpose type is distinguished by the scope of application of microcontrollers. For example, the 80C51 general-purpose microcontroller is not designed for a specific purpose; The special microcontroller is designed and produced for a class of products or even a certain product, for example, in order to meet the requirements of electronic thermometers, the temperature measurement control circuit with ADC interface and other functions is integrated in the chip.

The bus type is distinguished by whether the microcontroller provides a parallel bus. The bus-type single-chip microcomputer is generally provided with a parallel address bus, a data bus, a control bus, these pins are used to expand the parallel peripheral devices can be connected with the single-chip microcomputer through the serial port, in addition, many single-chip microcomputers have integrated the required peripheral devices and peripheral interfaces, so in many cases can not expand the bus in parallel, greatly reduce the packaging cost and chip volume, this kind of single-chip microcomputer is called non-bus single-chip microcomputer.

A general term for a microprocessor, which means that a chip can do most of the functions.

1 Hello all of these don't seem to be, the first group: Winbond's 2M memory chip; The second group: also memory chips; Group III:

The upper part is a real-time clock chip; The last group: how the screen works. Or maybe you're missing something.

Then there is the fact that your screen does not have a main control chip, such as 8051 single-chip microcomputer, and it can also run under the control of the memory chip. However, DS12C887 needs to have a CPU.

There's really no way, keep the power supply and drive part, make a control card yourself, and do whatever you want. At the same time, it also exercised hands-on ability.