The device is manufactured using Atmel's high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 and 80C52 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications. In addition, the AT89C52 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Power-down mode saves the RAM contents but freezes the oscillator, disabling all other chip functions until the next hardware reset. When 1s are written to Port 2 pins, they are pulled high by the internal pullups and can be used as inputs.
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Note: The datasheet of the AT89S52 Microcontroller and more detailed Features can be found at the bottom of this page. Since it is similar to the trust worthy architecture these microcontrollers are as per industry standard. The Microcontroller also has Operating mode, Idle Mode and Power down mode which makes it suitable for battery operated applications.
However you can utilise external modules for the same. Atmel microcontroller can be programmed with different software's that is available in the market. Arduino, Keil uVision are the most used platforms to name a few.
If you are planning on serious programming and expansion with community support then Keil is recommended. In order to program the Atmel microcontroller we will need an IDE Integrated Development Environment , where the programming takes place. Also simulating you program on software before trying it on hardware will save a lot of time. Their collection has just piled up after Microchip has acquired Atmel.
Each MCU has its own advantage and disadvantage. The below points are just suggestions which might help one to select a MCU. Subscribe to stay updated with industry's latest Electronics components and news.
Component Datasheet. AT89S52 Microcontroller Datasheet. Tags Microcontroller. Get Our Weekly Newsletter!
Datasheet AT89C52-24PC - Atmel Microcontrollers (MCU) 8K Flash 24M
AT89C52-24PC - AT89C52 40-Pin 24MHz 8kb 8-bit Microcontroller Technical Data