Overview
The AT91SAM7S256D-AU-999 is a 32-bit microcontroller from Microchip Technology, part of the SAM7S series. It is based on the ARM7TDMI RISC processor and operates at a maximum speed of 55 MHz. This microcontroller features 256 KB of flash memory and 64 KB of SRAM, making it suitable for a wide range of applications that require high performance and low power consumption.
The device includes a comprehensive set of peripherals, such as a Full Speed USB device, UART, two USARTs, TWI (I2C), SPI, SSC, and various timers. It also supports single-cycle instruction access from embedded flash, achieving 27 MIPS. The multi-layer bus matrix, multiple SRAM banks, and DMA support enable efficient parallel task execution and maximize data throughput.
Key Specifications
| Parameter | Value |
|---|---|
| Processor Type | ARM7TDMI RISC |
| Maximum Speed | 55 MHz |
| Program Memory Size | 256 KB |
| SRAM | 64 KB |
| Data EEPROM | 0 bytes |
| Temperature Range | -40°C to 85°C |
| Operation Voltage | 3.0V to 3.6V |
| DMA Channels | 11 |
| SPI | 1 |
| I2C | 1 |
| USB | Full Speed USB 2.0 (12 Mbps) |
| Package Type | 64-lead LQFP or 64-pad QFN |
Key Features
- High-Performance Processor: Based on the 32-bit ARM7TDMI RISC processor, achieving up to 27 MIPS at 55 MHz.
- Memory and Storage: 256 KB of flash memory and 64 KB of SRAM.
- Peripheral Set: Includes Full Speed USB device, UART, two USARTs, TWI (I2C), SPI, SSC, two PWM timers, three 16-bit timers, RTT, and an 8-channel 10-bit ADC.
- Power Management: Embedded 1.8V regulator, low-power RC oscillator, and power management controller (PMC).
- Interrupt and DMA Support: Advanced interrupt controller (AIC) and eleven peripheral DMA controller (PDC) channels.
- Debugging and Testing: EmbeddedICE™ in-circuit emulation and IEEE 1149.1 JTAG boundary scan on all digital pins.
Applications
The AT91SAM7S256D-AU-999 is versatile and can be used in a variety of applications, including:
- Industrial Automation: Control systems, sensors, and actuators.
- Consumer Electronics: Smart home devices, audio equipment, and gaming consoles.
- Medical Devices: Diagnostic equipment, patient monitoring systems, and portable medical devices.
- Automotive Systems: Infotainment systems, navigation, and vehicle control units.
- Internet of Things (IoT): Smart sensors, IoT gateways, and connected devices.
Q & A
- What is the maximum operating speed of the AT91SAM7S256D-AU-999?
The maximum operating speed is 55 MHz.
- How much flash memory and SRAM does the AT91SAM7S256D-AU-999 have?
It has 256 KB of flash memory and 64 KB of SRAM.
- What type of processor is used in the AT91SAM7S256D-AU-999?
The processor is a 32-bit ARM7TDMI RISC processor.
- Does the AT91SAM7S256D-AU-999 support USB?
Yes, it supports Full Speed USB 2.0 at 12 Mbps.
- What are the temperature and voltage operating ranges for the AT91SAM7S256D-AU-999?
The temperature range is -40°C to 85°C, and the voltage range is 3.0V to 3.6V.
- How many DMA channels does the AT91SAM7S256D-AU-999 have?
It has eleven peripheral DMA controller (PDC) channels.
- What package types are available for the AT91SAM7S256D-AU-999?
It is available in 64-lead LQFP and 64-pad QFN packages.
- Does the AT91SAM7S256D-AU-999 support debugging and testing features?
Yes, it supports EmbeddedICE™ in-circuit emulation and IEEE 1149.1 JTAG boundary scan.
- What is the purpose of the multi-layer bus matrix in the AT91SAM7S256D-AU-999?
The multi-layer bus matrix supports parallel tasks and maximizes data throughput.
- Where can I find technical support for the AT91SAM7S256D-AU-999?
Technical support can be obtained by contacting the distributor directly or through Microchip Technology's customer support team.
