A comprehensive analysis of the time-tested 8051 architecture microcontroller

Some friends may read this article and say disdainfully: 8051 has been eliminated long ago, and now it is dominated by STM32/8 and MSP430. It is undeniable that STM and MSP are powerful, but 8051 is still the most used microcontroller at present, just because it is classic!
I believe that as long as the 8051 microcontroller is mentioned in the industry, everyone knows it. Whether you are a senior industry leader or a graduate who has just entered the electronics industry, you all have the same answer to the 8051 microcontroller: classic, give it a thumbs up from the bottom of your heart!

With Atmel's wide range of feature-rich 8-bit microcontrollers based on the 8051 instruction set, we can ensure that our 8051 designs are excellent. So whether engineers are working with legacy, existing or new designs, you can get the latest features and functions, and the products provide flash memory of various sizes from 2KB to 64KB...
                
NO.1: AT89LP Series Flash ISP - Single Cycle Core
The most popular AT89LP series takes the functionality of 8051 microcontrollers to a new level.
Compared with the 12 clock cycles required to execute instructions in the traditional 8051 CPU, these high-performance 8-bit microcontrollers can execute most instructions in a single clock cycle. Under the same MIPS throughput conditions as the traditional 8051, existing applications can use lower clock frequencies and reduce power consumption by up to 80%. Application performance can be improved to a throughput of 20 MIPS, which is 12 times faster than the traditional 8051 core...

The main advantages are:
1. Binary compatibility, existing 8051 products are easy to upgrade
2. Single clock cycle to obtain each byte
3. Enhanced power efficiency can save power

Classic products:
AT89LP213 - low power consumption, high performance CMOS 8-bit microcontroller with 2KB Flash memory with ISP function. It uses
high-density non-volatile memory technology and is compatible with the industrial standard MCS®-51 instruction set.

NO.2: Flash ISP (In-System Programmable) series of
high-performance flash 8051 microcontrollers with in-system programming (ISP) function. The integrated flash memory can be programmed in parallel mode or serial mode through parallel/ISP software respectively.
They have a variety of internal RAM configurations and rich functions. Some models have A/D converters, boot flash memory and programmable counter arrays. The efficient design of the product can help you reduce system power consumption.
The power consumption can be further controlled by software-reduced activity modes and 8-bit clock prescalers.
The 8051 Flash ISP microcontroller is powerful and efficient, and is an ideal choice for applications that require A/D conversion, pulse width modulation, high-speed I/O and counting functions, such as industrial control, consumer products, alarms, motor control, etc.

The main advantages are:
1. High performance and in-system programming, rich functions
2. No data loss by lowering the clock frequency to any value, even as low as DC
3. High performance and in-system programming, rich functions

Classic boutique:
AT89C5115 - low pin count 8-bit microcontroller with A/D converter and 16KB flash memory
               
NO.3: Flash memory - reprogrammable
Atmel offers a variety of 8051 reprogrammable flash memory microcontrollers that can support a variety of embedded applications. The integrated design provides a rich and flexible feature set, and low power consumption improves efficiency.
For example, the AT89C4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 4KB programmable flash memory and erasable read-only memory. The device is manufactured using Atmel's high-density, non-volatile memory technology and is compatible with the industry standard MCS-51 instruction set.

The main advantages are:
1. Compatible with MCS®51 products, 4K bytes of programmable Flash memory, 10,000 write/erase cycles
2. Fully static operation: 0 Hz to 24 MHz
3. Two 16-bit timers/counters, 6 interrupt sources, programmable serial UART channels

NO.4: CAN Network Connected MCU
When introduced to the market in 1986, Controller Area Network (CAN) technology was initially used for automotive engine control communications. Since then, it has quickly gained popularity and a large number of applications have emerged, including medical equipment, avionics, factory and industrial automation, and marine environments. Atmel is well positioned to support CAN network connectivity through multiple 8051 microcontroller flash technologies and rich CAN network connectivity experience.

At the same time, a number of classic devices emerged:
AT89C51CC01--with 32KB flash and 1.2KB RAM, it is very suitable for slave applications. It provides 2KB boot flash and can provide at least 3MIPS processing power on top of the CANopen or DeviceNet stack, which is very suitable for complex I/O systems.
AT89C51CC02--with 16KB flash, 0.5KB RAM, and a simple 4-message object CAN engine encapsulated in a "small pin count" package, it is the most ideal low-cost product for CAN controller buttons.
AT89C51CC03--provides 64KB flash for applications and 2KB RAM for large object dictionaries. The built-in SPI port also plays an auxiliary role in communicating with other devices. It has 15 message objects, a 2KB boot loader and 2KB EEPROM.

NO.5: USB MCU
8051 USB microcontrollers are designed for today's increasingly connected applications and provide powerful interface options, especially suitable for devices such as flash recorders, cameras and mobile phones.

1. The AT89C5131A is the most popular device in this series, combining functionality and performance.
Biggest advantage: Integrates 32KB flash memory, 1.2KB RAM, 1K EEPROM, 7 USB endpoints, TWI, SPI, UART and Programmable Counter Array (PCA).
2. The AT89C5132 is a large-capacity storage device that controls data exchange between various flash modules, HDDs and CD-ROMs.
Biggest advantage: Contains 64KB flash memory, which can be programmed in the system through an embedded 4KB boot flash memory.
3. This multifunctional device provides all the necessary functions required for human-machine interface, including timers, keyboard ports, serial or parallel interfaces (USB, SPI, IDE), ADC inputs, I2S outputs and all external memory interfaces (NAND or NOR flash memory, smart media, multimedia and data flash cards)

NO.6: Lighting MCU
The biggest features of lighting MCU are: stable and reliable analog interface, intelligent power management.
Typical boutique:
AT83EB5114 - a high-performance product of 80C51 8-bit microcontroller in a "low pin count" package

The main advantages are as follows:
1. It is optimized for lighting control applications.
2. It has all the functions of the standard 80C51, including 4KB program memory, 256 bytes of internal RAM, 7-source 4-level interrupt system, on-chip oscillator and two timers/counters.
3. It contains a serial two-wire interface EEPROM, which is located in the same package as the microcontroller.

NO.7: ROMless MCU
Atmel offers powerful ROMless 8051 microcontrollers for existing ROMless applications that require a perfect combination of performance, flexibility and power efficiency.
The AT80C51RD2 is a microcontroller with all the features of the Atmel 80C52.

The main advantages are:
1. Contains 256 bytes of internal RAM, 7-source 4-level interrupt controller and 3 timers/counters.
2. To enhance system performance, the ROMless microcontroller has a programmable counter array, 1024 bytes of RAM, hardware watchdog timer and keyboard interface
3. Contains a multi-function serial channel that simplifies multi-processor communication (EUART) and a speed-up mechanism (X2 mode)

When other manufacturers gradually withdrew from the market, Atmel did not give up and was committed to further expanding the development route of mature 8051 MCU. Nowadays, most of the 8051 are DIY by electronic enthusiasts and are still widely used in some ordinary life occasions, so the application functions of 8051 in some occasions are not inferior to STM and MSP...

STM32/8 relies on its ultra-high cost performance, MSP430 has ultra-convenient performance, and 8051 still has an unignorable influence in the MCU industry with its low-key but unique temperament, ordinary but classic characteristics~~

Only by keeping the original intention in mind can we achieve success... If you keep the image in mind, there will be a response...