The Atmel AT89S2051-24SI is a low-power 8-bit CMOS microcontroller based on the 8051 architecture. It features 2K bytes of in-system programmable Flash memory, 128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a 6-source, 4-level interrupt structure, a full duplex UART, on-chip oscillator and clock circuitry. It is designed for cost-sensitive applications needing moderate processing power and low power consumption.

Applications

• Small embedded systems
• Toy and game controllers
• Low-end consumer electronics
• Remote controls
• Security devices

Features

• Compatible with MCS-51 Products
• 2K Bytes of In-System Programmable (ISP) Flash Memory
• Endurance: 1,000 Write/Erase Cycles
• Full Static Operation: 0 Hz to 24 MHz
• 128 x 8-bit Internal RAM
• 15 Programmable I/O Lines
• Two 16-bit Timer/Counters
• Six Interrupt Sources
• Programmable UART Serial Channel
• Direct LED Drive Outputs
• On-chip Oscillator and Clock Circuitry
• Power-down Mode Improves Power Savings

Benefits

• Compact size: Suitable for space-constrained applications.
• Low cost: Provides an economical solution for embedded control.
• In-system programmability: Facilitates easy firmware updates and customization.
• Low power consumption: Ideal for battery-powered devices.
• Easy to use: Based on the familiar 8051 architecture.

Additional Details

The AT89S2051-24SI operates from 0 Hz to 24 MHz. It is packaged in a 20-pin PDIP, SOIC, or TSSOP. The UART allows for serial communication, and the direct LED drive outputs simplify interfacing with LED displays. The on-chip oscillator eliminates the need for external clock components. The device is now end-of-life.