90S2343

AT90S2343: 8-Bit AVR Microcontroller Technical Summary

Overview

The AT90S/LS2323 and AT90S/LS2343 are low-power CMOS 8-bit microcontrollers based on the AVR® enhanced RISC architecture. These devices execute powerful instructions in a single clock cycle, achieving throughputs approaching 1 MIPS per MHz. This high-performance capability allows system designers to optimize power consumption while maintaining processing efficiency. The microcontroller family includes variants with different voltage ranges and speed grades, making them suitable for a wide array of embedded applications.

The AT90S2343 features 2KB of In-System Programmable (ISP) Flash memory, 128 bytes of EEPROM, and 128 bytes of internal RAM. It also includes programmable I/O lines, timers, and interrupt sources, making it a versatile choice for control-oriented applications. The device is available in an 8-pin package, offering a compact solution for space-constrained designs.

Features

• AVR® Enhanced RISC Architecture: High-performance and low-power RISC architecture with 118 powerful instructions, most executing in a single clock cycle.
• Memory:
  • 2KB of In-System Programmable (ISP) Flash memory with SPI serial interface (1,000 write/erase cycles endurance).
  • 128 bytes of EEPROM (100,000 write/erase cycles endurance).
  • 128 bytes of internal RAM.
  • 32 x 8 general-purpose working registers.
• Programmable I/O:
  • 3 programmable I/O lines (AT90S/LS2323).
  • 5 programmable I/O lines (AT90S/LS2343).
• Voltage Range:
  • 4.0V to 6.0V (AT90S2323/AT90S2343).
  • 2.7V to 6.0V (AT90LS2323/AT90LS2343).
• Clock Speed:
  • 0 to 10 MHz (AT90S2323/AT90S2343).
  • 0 to 4 MHz (AT90LS2323/AT90LS2343).
• Performance: Up to 10 MIPS throughput at 10 MHz.
• Timers: One 8-bit timer/counter with a separate prescaler.
• Interrupts: External and internal interrupt sources.
• Watchdog Timer: Programmable watchdog timer with on-chip oscillator.
• Power Management: Low-power idle and power-down modes.
• Security: Programming lock for Flash program and EEPROM data security.
• Oscillator: Selectable on-chip RC oscillator.

Applications

The AT90S2343 microcontroller is well-suited for a variety of embedded control applications, including but not limited to:

• Consumer Electronics: Remote controls, small appliances, and toys.
• Industrial Control: Sensors, actuators, and simple automation systems.
• Automotive: Basic control modules, lighting systems, and sensor interfaces.
• Home Automation: Smart switches, timers, and environmental monitors.
• Wearable Devices: Low-power fitness trackers and simple health monitors.
• Hobbyist Projects: DIY electronics, robotics, and educational kits.

Electrical Characteristics

The AT90S2343 operates under the following electrical conditions:

• Supply Voltage (VCC):
  • 4.0V to 6.0V for AT90S2323/AT90S2343.
  • 2.7V to 6.0V for AT90LS2323/AT90LS2343.
• Operating Temperature: Standard industrial range (-40°C to +85°C).
• Power Consumption:
  • Active mode: Typically under 5 mA at 5V and 4 MHz.
  • Idle mode: Reduced power consumption with CPU halted but peripherals active.
  • Power-down mode: Minimal power usage with only the watchdog timer active.
• I/O Pin Characteristics:
  • Output current: 20 mA per pin (max).
  • Input voltage range: 0V to VCC.

Package Information

The AT90S2343 is available in an 8-pin package, providing a compact footprint for space-sensitive designs. The package options include:

• PDIP (Plastic Dual In-Line Package): Through-hole mounting for prototyping and easy soldering.
• SOIC (Small Outline Integrated Circuit): Surface-mount package for compact PCB designs.

Pinout details include:

• VCC: Power supply input.
• GND: Ground reference.
• RESET: Active-low reset input.
• I/O Ports: Programmable general-purpose I/O pins (3 or 5 depending on variant).
• XTAL1/XTAL2: Connections for external crystal oscillator or resonator.

Conclusion

The AT90S2343 is a versatile and efficient 8-bit microcontroller, offering a balance of performance, power efficiency, and compact design. Its AVR RISC architecture, combined with features like ISP Flash, EEPROM, and multiple power-saving modes, makes it an excellent choice for a wide range of embedded applications. Whether used in consumer electronics, industrial systems, or hobbyist projects, the AT90S2343 provides reliable and flexible control capabilities.