90S2323

AT90S/LS2323 and 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 high-performance, low-power architecture makes them ideal for applications requiring efficient processing and energy conservation. The microcontrollers feature in-system programmable Flash memory, EEPROM, and internal RAM, along with a variety of peripherals and power-saving modes.

Key Features

• AVR® Enhanced RISC Architecture - High-performance, 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), and 128 bytes of internal RAM.
• General-Purpose Registers - 32 x 8 general-purpose working registers.
• Programmable I/O Lines - 3 I/O lines for AT90S/LS2323 and 5 I/O lines for AT90S/LS2343.
• Voltage Range - Operates at 4.0V to 6.0V for AT90S2323/AT90S2343 and 2.7V to 6.0V for AT90LS2323/AT90LS2343.
• Clock Speed - Supports 0-10 MHz for AT90S2323/AT90S2343 and 0-4 MHz for AT90LS2323/AT90LS2343, delivering up to 10 MIPS throughput at 10 MHz.
• Timers & Counters - One 8-bit timer/counter with a separate prescaler.
• Interrupts - Supports both external and internal interrupt sources.
• Watchdog Timer - Programmable watchdog timer with on-chip oscillator.
• Power Management - Features low-power idle and power-down modes.
• Security - Programming lock for Flash program and EEPROM data security.
• On-Chip Oscillator - Selectable on-chip RC oscillator.
• Package - Available in an 8-pin configuration.

Applications

The AT90S/LS2323 and AT90S/LS2343 microcontrollers are well-suited for a variety of embedded control applications, including but not limited to:

• Consumer electronics (remote controls, smart sensors)
• Industrial automation (motor control, sensor interfacing)
• Home appliances (thermostats, lighting systems)
• Automotive electronics (basic control modules, dashboard systems)
• Battery-powered devices (wearables, portable instruments)
• Embedded systems requiring low-power operation

Electrical Characteristics

Operating Voltage

• AT90S2323/AT90S2343: 4.0V - 6.0V
• AT90LS2323/AT90LS2343: 2.7V - 6.0V

Clock Speed

• AT90S2323/AT90S2343: 0 - 10 MHz
• AT90LS2323/AT90LS2343: 0 - 4 MHz

Performance

• Up to 10 MIPS throughput at 10 MHz
• Most instructions execute in a single clock cycle

Power Consumption

• Low-power idle and power-down modes for energy-efficient operation
• Optimized for battery-powered applications

Memory Specifications

• Flash Memory: 2KB ISP Flash, 1,000 write/erase cycles
• EEPROM: 128 bytes, 100,000 write/erase cycles
• RAM: 128 bytes internal

Package Information

The AT90S/LS2323 and AT90S/LS2343 microcontrollers are available in an 8-pin package, making them compact and suitable for space-constrained applications. The exact package dimensions and pin configurations are as follows:

Pin Configuration (8-Pin Package)

• Pin 1 (RESET): Reset input (active low)
• Pin 2 (PB3): General-purpose I/O
• Pin 3 (PB4): General-purpose I/O
• Pin 4 (GND): Ground
• Pin 5 (PB5): General-purpose I/O (AT90S/LS2343 only)
• Pin 6 (PB2): General-purpose I/O
• Pin 7 (PB1): General-purpose I/O
• Pin 8 (VCC): Supply voltage

Mechanical Dimensions

• Package Type: 8-pin PDIP (Plastic Dual In-line Package)
• Width: 0.3 inches (7.62 mm)
• Length: 0.4 inches (10.16 mm)
• Height: 0.15 inches (3.81 mm)

Conclusion

The AT90S/LS2323 and AT90S/LS2343 microcontrollers offer a powerful yet energy-efficient solution for embedded control applications. With their high-performance RISC architecture, in-system programmable memory, and versatile I/O capabilities, these devices are well-suited for a wide range of applications, from consumer electronics to industrial automation. Their compact 8-pin package and low-power modes make them particularly attractive for portable and battery-powered designs.