AT89S52-24PU Microcontroller Equivalent, Features and Working Principle
13 September 2023
Ⅰ. AT89S52-24PU overview
AT89S52 is a low-voltage, high-performance 8-bit CMOS microcontroller with 8K bytes of in-circuit programmable flash memory (ISP). AT89S52 is a high-density non-volatile memory compatible with the 80C51 series instructions and pins. It can be reprogrammed through the support of on-chip FLASH and ISP and conventional FLASH programmers.
In addition, the AT89S52 is designed with a static logic circuit that can reduce the clock frequency to 0 Hz. Two energy-saving modes can be set through software:
1. The idle model: The CPU does not work, but the RAM, timer or counter, serial port and interrupt system still work;
2. The power-down model: Only retains the data in RAM, but stops the oscillator, and other on-chip functions are disabled until interrupt wake-up or hardware restart.
Replacement and equivalent：
• AT89S51
• AT89C52
• STC89C52
Ⅱ. Pin diagram of AT89S52-24PU
Ⅲ. Technical parameters
Ⅳ. Features of AT89S52-24PU
• 8-bit CPU
• Fast programming time
• 32 programmable I/O lines
• Flash memory area for online programming
• Operating voltage range from 4.0 v to 5.5 v
• Compatible with MCS-51 instruction set
• Fully static operation: 0 Hz to 33 MHz
• Equipped with 8 interrupt sources
• Equipped with 256x8bit on-chip RAM
• Equipped with three 16-bit timer/counters
• Equipped with low voltage idle mode and power sleep mode
Ⅴ. Application of AT89S52-24PU
AT89S52-24PU can be used in various embedded control systems, smart instruments, automation equipment and other fields. At the same time, it also supports a variety of clock frequencies, allowing users to choose according to actual needs. In addition, it also supports online programming to facilitate upgrades and maintenance. Below are some common application areas.
1. Electronic timer
The microcontroller has several built-in timers and counters that can be used to generate precise time delays and timed operations. This is very useful for applications that require timing control, such as pulse width modulation (PWM) control, scheduled interrupts, etc.
2. Automotive electronics
In the automotive field, such microcontrollers are used in engine control units (ECUs), dashboard controls, in-car entertainment systems, safety systems and vehicle communications. It coordinates the vehicle's various functions and systems.
3. Data collection system
The AT89S52-24PU has multiple input or output pins that can be used to build data acquisition systems and monitor and record sensor data such as temperature, humidity, pressure, etc.
4. Embedded system controller
It is used to control various embedded systems in home appliances, industrial automation systems, medical equipment, etc. Its 8-bit processing power is enough to handle many basic tasks.
5. Electronic display control
It is used to control various display devices, such as 7-segment LED displays, LCD displays, digital tubes, etc. With appropriate interfaces and driver circuits, various text and graphic displays can be achieved.
6. Communication interface
It supports serial communication protocols such as UART (Universal Asynchronous Receiver Transmit) and SPI (Serial Peripheral Interface), so it can be used to communicate with other devices such as sensors, LCD displays, and wireless modules.
7. Automation equipment
This kind of microprocessor can be used to control automation equipment such as assembly line robots, automatic assembly lines, and automatic manufacturing equipment. It can realize coordination and control of equipment movement, sensor data collection, and system decision-making.
Ⅵ. AT89S52-24PU 3D Model
Ⅶ. How does the AT89S52 microcontroller work?
Its working process can generally be divided into the following steps:
First, after the AT89S52 MCU is powered on, we need to initialize it to prepare it for program running. If the high level of the RST pin exceeds two machine cycles, the MCU is reset and the program is restarted.
Next, the MCU needs to complete the initialization of the system clock. AT89S52 has a built-in clock signal generator, which can be connected to the crystal oscillator through the XTAL1 and XTAL2 pins to generate clock signals for use by the CPU and other components.
Then, the MCU needs to load the program code. When the microcontroller is reset, the PC (program counter) points to an address in the program memory and starts executing instructions. In program memory, user-written programs are stored in program memory. The central processing unit performs calculation operations according to the instruction content.
Next, the MCU needs to complete data storage. AT89S52 has a certain capacity of on-chip RAM, which can be used to store data. In addition, it can access external data memory through the external data memory interface.
Finally, during the running of the program, it needs to input and output data. AT89S52 has a variety of input and output interfaces, which can realize data exchange with the outside world and control of the outside world.
Frequently Asked Questions
1. What is the advantage of AT89S52?
The device uses Microchip high-density, nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. On-chip flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer.
2. What is AT89S52 microcontroller?
The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmel's high-density nonvolatile memory technology and is compatible with the indus- try-standard 80C51 instruction set and pinout.
3. How many pins does AT89S52 have?
Like other microcontrollers, Furthermore, it has 40 pins, out of which 32 are GPIO pins. It comprises three 16-bit timers, external interrupts, a full-duplex serial port, an on-chip oscillator, and clock circuitry.
4. What is the function of AT89S52 microcontroller?
This microcontroller finds its applications from domestic devices to the industrial level to provide digital control to embedded systems. The Microcontroller also has Operating mode, Idle Mode, and Power-down mode which makes it suitable for battery-operated applications.
5. What are the special features of AT89C52 microcontroller?
AT89C52 is an 8-bit microcontroller and belongs to Atmel's 8051 families. AT89C52 has 8KB of Flash programmable and erasable read-only memory (PEROM) and 256 bytes of RAM. AT89C52 has an endurance of 1000 Write/Erase cycles which means that it can be erased and programmed to a maximum of 1000 times.
