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The AT91SAM7S256D-AU is a microcontroller from MicroCHIP based on the ARM7TDMI core. Below are its specifications, descriptions, and features:

Manufacturer:

MicroCHIP Technology

Specifications:

• Core: ARM7TDMI (32-bit RISC processor)
• Operating Frequency: Up to 55 MHz
• Flash Memory: 256 KB (organized in 128-bit wide memory)
• SRAM: 64 KB
• Operating Voltage: 1.8V to 3.6V
• Package: 64-pin LQFP (Low-profile Quad Flat Package)
• Temperature Range: -40°C to +85°C
• I/O Pins: 32 (multiplexed with peripheral functions)
• Timers:
• 3-channel 16-bit Timer/Counter (TC)
• 4-channel 16-bit PWM Controller (PWMC)
• Watchdog Timer (WDT)
• Communication Interfaces:
• USART (2x)
• SPI (1x)
• TWI (I²C-compatible, 1x)
• USB 2.0 Full-Speed Device Port (1x)
• Analog Features:
• 8-channel 10-bit ADC
• Debug Interface:
• JTAG Boundary Scan
• Embedded ICE (In-Circuit Emulation)
• Power Management:
• Multiple low-power modes (Idle, Sleep, Backup)

Descriptions:

The AT91SAM7S256D-AU is a high-performance ARM7-based microcontroller designed for embedded applications requiring robust processing, connectivity, and real-time control. It integrates 256 KB of Flash memory and 64 KB of SRAM, making it suitable for applications such as industrial control, consumer electronics, and communication devices.

Features:

• High-performance 32-bit ARM7TDMI core
• On-chip Flash with secure lock bits
• Flexible power management for low-power applications
• Rich peripheral set including USB, USART, SPI, and TWI
• Hardware-based interrupt controller for real-time response
• Industrial-grade temperature range (-40°C to +85°C)
• RoHS-compliant packaging

This microcontroller is ideal for applications requiring embedded processing with connectivity options while maintaining low power consumption.