AT91SAM7S321-AU

Product Overview

• Category: Microcontroller
• Use: Embedded systems, Internet of Things (IoT) devices, industrial automation
• Characteristics: Low-power consumption, high-performance, rich peripheral set
• Package: TQFP (Thin Quad Flat Package)
• Essence: ARM7TDMI-S core-based microcontroller

Specifications

• CPU: ARM7TDMI-S running at 55 MHz
• Flash Memory: 32 KB
• SRAM: 8 KB
• Operating Voltage: 1.65V to 3.6V
• I/O Pins: 48
• Communication Interfaces: USART, SPI, TWI (Two-Wire Interface)
• Analog-to-Digital Converter (ADC): 10-bit, 8 channels
• Timers/Counters: 2 x 16-bit, 1 x 8-bit
• PWM Channels: 4
• Power Supply: Single power supply, internal voltage regulator

Pin Configuration

The AT91SAM7S321-AU microcontroller has a total of 100 pins. The pin configuration is as follows:

• Port A: PA0 to PA31
• Port B: PB0 to PB31
• Port C: PC0 to PC31
• Port D: PD0 to PD31
• Port E: PE0 to PE15
• Port F: PF0 to PF15

For a detailed pinout diagram, please refer to the datasheet.

Functional Features

• High-performance ARM7TDMI-S core for efficient processing
• Low-power consumption for extended battery life in portable applications
• Rich peripheral set including USART, SPI, and TWI for versatile communication options
• Built-in ADC for analog signal acquisition
• Timers/Counters and PWM channels for precise timing and control
• Single power supply operation simplifies the design

Advantages and Disadvantages

Advantages: - High-performance ARM7 core enables efficient processing - Low-power consumption extends battery life in portable applications - Rich peripheral set provides versatile communication options - Built-in ADC allows for analog signal acquisition - Timers/Counters and PWM channels offer precise timing and control

Disadvantages: - Limited flash memory and SRAM compared to newer microcontrollers - 10-bit ADC resolution may not be sufficient for some applications - Limited number of I/O pins may restrict the connectivity options

Working Principles

The AT91SAM7S321-AU microcontroller is based on the ARM7TDMI-S core architecture. It executes instructions fetched from the flash memory and interacts with various peripherals to perform desired tasks. The microcontroller operates at a specified clock frequency and can communicate with external devices through its communication interfaces. It can also acquire analog signals using the built-in ADC and generate precise timing and control signals using timers/counters and PWM channels.

Application Field Plans

The AT91SAM7S321-AU microcontroller finds applications in various fields, including: - Embedded systems - Internet of Things (IoT) devices - Industrial automation - Consumer electronics - Automotive systems

Alternative Models

• AT91SAM7S64-AU: Similar features but with higher flash memory and SRAM capacity
• AT91SAM7S128-AU: Similar features but with higher flash memory and SRAM capacity
• AT91SAM7S256-AU: Similar features but with higher flash memory and SRAM capacity
• AT91SAM7S512-AU: Similar features but with higher flash memory and SRAM capacity

These alternative models provide increased memory capacity for applications that require more storage and data processing capabilities.

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