AT91SAM7S256D-AU-999

Microcontrollers Overview

The AT91SAM7S256D-AU-999 is an ARM microcontroller from the SAM7S series, manufactured by Microchip Technology. It features an ARM7TDMI core operating at a maximum clock frequency of 55 MHz. The device includes 256 kB of Flash program memory and 32 kB of data RAM. It is housed in a 64-LQFP package with a 10x10 mm footprint. The unit supports a supply voltage range of 1.65 V to 1.95 V and operates within a temperature range of -40°C to +85°C. Connectivity options include I2C, SPI, SSC, USART, and USB interfaces.

Microcontrollers Feature Summary

• Integrates an ARM7TDMI processor core for efficient instruction execution.
• Includes embedded Flash memory for non-volatile code storage.
• Supports multiple communication protocols including USB and serial interfaces.
• Features built-in analog-to-digital conversion capabilities.

Microcontrollers Applications

• Embedded control systems requiring ARM architecture
• Industrial applications with industrial temperature requirements
• Devices utilizing USB connectivity for data transfer

Microcontrollers Procurement Notes

Verify the specific suffix -999 against official Microchip documentation to confirm packaging details, as this often denotes tape-and-reel configuration distinct from standard tray packaging. Ensure compatibility with existing design files regarding pinout and electrical characteristics before procurement. Confirm moisture sensitivity level handling requirements during storage and assembly processes.

Microcontrollers Selection Notes

Select this component when a balance of moderate memory capacity and rich peripheral integration is required for cost-sensitive embedded designs. The 64-pin LQFP package offers a compact solution for space-constrained boards. Consider the 55 MHz performance limit and 32 kB RAM size relative to application complexity. Verify that the available I/O count meets interface requirements without external multiplexing.

Microcontrollers Part Context

This part belongs to the AT91SAM7S family, which provides a high-performance, low-power 32-bit RISC microcontroller solution. The SAM7S series is designed for applications needing robust processing power with integrated peripherals. The AT91SAM7S256 variant specifically targets use cases requiring 256 kB of Flash memory, distinguishing it from smaller capacity models in the same series.

Microcontrollers FAQ

What is the difference between the AT91SAM7S256D-AU and AT91SAM7S256D-AU-999?

The primary difference lies in the packaging format. The base model typically comes in a tray, while the -999 suffix indicates a tape-and-reel configuration suitable for automated surface-mount assembly.

Does this microcontroller support JTAG debugging?

Yes, the AT91SAM7S256D-AU-999 includes a debug unit (DBGU) and supports JTAG boundary scan for in-circuit programming and debugging.