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ATmel 89C51 Datasheet, Circuit, 89C51 PDF Download

ATmel 89C51 Datasheet and 89C51 Circuit PDF Download

The Atmel 89C51, or AT89C51, is an 8051-based Fullly Static 24MHz CMOS controller with 32 I/O Lines, 2 Timers/Counters, 6 Interrupts/2 Priority Levels, UART, Three-Level Program Memory Lock, 4K Bytes Flash Memory, 128 Bytes On-chip RAM.

ATmel does not recommend this part for new designs.

89C51 pdf download 89c51 circuit

AT89C51 Price Check


ATmel 89C51 Technical Description

The ATmel 89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory (PEROM). The ATmel 89C51 device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

The ATmel 89C51 provides the following standard features: 4K Bytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16-bit timer/counters, a five vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator and clock circuitry. In addition, the 89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The AT89C51 Power-down Mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset.

  • Compatible with MCS-51 Products
  • 4K Bytes of In-System Reprogrammable Flash Memory
  • Fully Static Operation: 0 Hz to 24 MHz
  • Three-level Program Memory Lock
  • 128 x 8-bit Internal RAM 32
  • Programmable I/O Lines
  • Two 16-bit Timer/Counters
  • Six Interrupt Sources Programmable Serial Channel
  • Low-power Idle and Power-down Modes 40-pin DIP
 

ATmel 89C51 Pinouts

89C51_Pinouts

 

ATmel 89C51 Circuit / Block Diagram

89c51_circuit

 

ATmel 89C51 Packaging

89c51_packaging