AT90S/LS2343 8-bit 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 performance enables system designers to optimize power consumption while maintaining high processing efficiency. The microcontrollers are particularly suited for embedded applications requiring a balance of performance, power efficiency, and compact design.

The AT90S/LS2343 variant offers 5 programmable I/O lines compared to the 3 available on the AT90S/LS2323, providing additional flexibility for interfacing with peripherals. Both devices feature in-system programmable Flash memory, EEPROM, and internal RAM, making them versatile for various embedded applications.

Features

• AVR® Enhanced RISC Architecture: High-performance and low-power RISC architecture with 118 powerful instructions, most executing in a single clock cycle.
• Memory:
  • 2K bytes of In-System Programmable (ISP) Flash 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.
• General Purpose Registers: 32 x 8 general-purpose working registers.
• Programmable I/O Lines:
  • 3 programmable I/O lines for AT90S/LS2323.
  • 5 programmable I/O lines for AT90S/LS2343.
• Voltage Range:
  • 4.0V - 6.0V for AT90S2323/AT90S2343.
  • 2.7V - 6.0V for AT90LS2323/AT90LS2343.
• Speed Grades:
  • 0 - 10 MHz for AT90S2323/AT90S2343.
  • 0 - 4 MHz for AT90LS2323/AT90LS2343.
• Performance: Up to 10 MIPS throughput at 10 MHz.
• Timers: One 8-bit timer/counter with 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.
• Package: 8-pin configuration.

Applications

The AT90S/LS2343 microcontroller is designed for a wide range of embedded applications, including but not limited to:

• Consumer Electronics: Remote controls, small appliances, and toys.
• Industrial Control: Sensor interfacing, motor control, and automation systems.
• Automotive: Simple control modules, dashboard displays, and lighting systems.
• IoT Devices: Low-power sensor nodes and edge devices.
• Medical Devices: Portable health monitors and diagnostic tools.
• Embedded Systems: Custom control systems requiring low power and high efficiency.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VCC): 6.0V (max).
• Operating Temperature: -40°C to +85°C (industrial grade).
• Storage Temperature: -65°C to +150°C.

Recommended Operating Conditions

• Supply Voltage (VCC):
  • AT90S2323/AT90S2343: 4.0V - 6.0V.
  • AT90LS2323/AT90LS2343: 2.7V - 6.0V.
• Clock Frequency:
  • AT90S2323/AT90S2343: 0 - 10 MHz.
  • AT90LS2323/AT90LS2343: 0 - 4 MHz.

Power Consumption

• Active Mode: 1.5 mA typical at 1 MHz, 3V.
• Idle Mode: 0.5 mA typical at 1 MHz, 3V.
• Power-Down Mode: <1 µA typical at 3V.

Package Information

The AT90S/LS2343 is available in an 8-pin package, with the following pin configuration:

• Pin 1 (RESET): Reset input (active low).
• Pin 2 (PB3): General-purpose I/O or external interrupt input.
• Pin 3 (PB4): General-purpose I/O or timer/counter clock input.
• Pin 4 (GND): Ground.
• Pin 5 (PB0): General-purpose I/O or serial data input (MOSI).
• Pin 6 (PB1): General-purpose I/O or serial data output (MISO).
• Pin 7 (PB2): General-purpose I/O or serial clock input (SCK).
• Pin 8 (VCC): Supply voltage.

Mechanical Dimensions

• Package Type: 8-pin PDIP (Plastic Dual In-line Package).
• Width: 7.62 mm (nominal).
• Length: 9.27 mm (nominal).
• Height: 3.3 mm (max).
• Lead Pitch: 2.54 mm.

Conclusion

The AT90S/LS2343 microcontroller is a versatile and efficient solution for embedded systems requiring low power consumption and high performance. Its AVR® RISC architecture, combined with in-system programmable Flash and EEPROM, makes it suitable for a wide range of applications. The device's compact 8-pin package and flexible I/O options further enhance its appeal for space-constrained designs.