AT90S2313 - 8-Bit Microcontroller Technical Summary

Overview

The AT90S2313 is a low-power CMOS 8-bit microcontroller based on the AVR® enhanced RISC architecture. It is designed for high performance and efficiency, executing powerful instructions in a single clock cycle to achieve throughputs approaching 1 MIPS per MHz. This allows system designers to optimize power consumption versus processing speed. The AVR core integrates a rich instruction set with 32 general-purpose working registers, all directly connected to the Arithmetic Logic Unit (ALU). This architecture enables two independent registers to be accessed in a single instruction, executed in one clock cycle, resulting in significantly higher code efficiency and throughput compared to conventional CISC microcontrollers.

Key Features

• AVR® Enhanced RISC Architecture - High-performance, low-power RISC architecture with 120 powerful instructions, most executing in a single clock cycle.
• Memory
  • 2K bytes of In-System Reprogrammable Downloadable Flash with SPI serial interface for program downloading (Endurance: 1,000 write/erase cycles).
  • 128 bytes of EEPROM (Endurance: 100,000 write/erase cycles).
  • 128 bytes of Internal SRAM.
• Registers & I/O
  • 32 x 8 general-purpose working registers.
  • 15 programmable I/O lines.
• Operating Conditions
  • Voltage range: 2.7V to 6.0V.
  • Fully static operation, supporting frequencies from 0 to 20 MHz.
  • Instruction cycle time of 50 ns at 20 MHz.
• Timers & Counters
  • One 8-bit timer/counter with separate prescaler.
  • One 16-bit timer/counter with separate prescaler.
• Power Saving Modes
  • Idle Mode: Stops the CPU while allowing SRAM, timers, SPI port, and interrupt system to continue functioning.
  • Power Down Mode: Saves register contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hardware reset.
• Communication Interfaces
  • Programmable serial UART.
  • SPI serial port for Flash memory downloading.
• Additional Features
  • Programmable Watchdog Timer with internal oscillator.
  • Internal and external interrupts.

Applications

The AT90S2313 is a versatile microcontroller suitable for a wide range of embedded applications, including but not limited to:

• Consumer electronics (remote controls, smart home devices).
• Industrial automation (sensors, control systems).
• Automotive systems (dashboard controls, lighting).
• Medical devices (portable monitoring equipment).
• IoT and wireless communication modules.
• Power management systems.
• Hobbyist and educational projects.

Electrical Characteristics

Absolute Maximum Ratings

• Operating Voltage (VCC): 2.7V to 6.0V.
• Maximum Clock Frequency: 20 MHz.
• Operating Temperature Range: -40°C to +85°C (industrial grade).
• Storage Temperature Range: -65°C to +150°C.

DC Characteristics

• Supply Current (Active Mode @ 20 MHz): Typically 10 mA.
• Supply Current (Idle Mode @ 20 MHz): Typically 5 mA.
• Supply Current (Power Down Mode): Typically 1 µA.
• Input/Output Pin Leakage Current: ±1 µA max.
• Input Low Voltage (VIL): 0.3VCC max.
• Input High Voltage (VIH): 0.7VCC min.

AC Characteristics

• Clock Frequency: 0 to 20 MHz.
• Instruction Execution Time: 50 ns @ 20 MHz.
• SPI Clock Frequency: Up to 5 MHz (master mode).
• UART Baud Rate: Up to 1 Mbps.

Package Information

The AT90S2313 is available in a compact 20-pin PDIP (Plastic Dual In-line Package) and SOIC (Small Outline Integrated Circuit) package. Key package details include:

• Package Type: 20-Pin PDIP/SOIC.
• Dimensions (PDIP): 26.16 mm x 6.35 mm.
• Dimensions (SOIC): 12.8 mm x 7.5 mm.
• Pin Pitch: 2.54 mm (PDIP), 1.27 mm (SOIC).
• Lead Material: Matte tin-plated copper.

Pin Configuration

The 20-pin configuration includes:

• VCC: Power supply (2.7V to 6.0V).
• GND: Ground.
• Port B (PB0-PB7): 8-bit bidirectional I/O port with internal pull-up resistors.
• Port D (PD0-PD6): 7-bit bidirectional I/O port with internal pull-up resistors.
• RESET: Active-low reset input.
• XTAL1/XTAL2: Crystal oscillator connections.
• SPI Pins (MOSI, MISO, SCK): Serial Peripheral Interface for programming and communication.

Conclusion

The AT90S2313 is a highly efficient and flexible 8-bit microcontroller, offering a balance of performance, power efficiency, and cost-effectiveness. Its advanced RISC architecture, in-system reprogrammable Flash memory, and versatile peripheral set make it an ideal choice for a wide range of embedded applications. With robust electrical characteristics and multiple power-saving modes, it is well-suited for both battery-powered and high-performance systems.