Описание
AT91SAM7S256D-MU is a series of low pin count Flash microcontrollers based on the 32-bit ARM RISC processor. It features a high-speed Flash and an SRAM, a large set of peripherals, including a USB 2.0 device (except for the SAM7S32 and SAM7S16), and a complete set of system functions minimizing the number of external components. The device is an ideal migration path for 8-bit microcontroller users looking for additional performance and extended memory. The embedded Flash memory can be programmed in-system via the JTAG-ICE interface or via a parallel interface on a production programmer prior to mounting. Built-in lock bits and a security bit protect the firmware from accidental overwrite and preserves its confidentiality. The AT91SAM7S256D-MU system controller includes a reset controller capable of managing the power-on sequence of the microcontroller and the complete system. Correct device operation can be monitored by a built-in brownout detector and a watchdog running off an integrated RC oscillator. The AT91SAM7S256D-MU are general-purpose microcontrollers. Their integrated USB Device port makes them ideal devices for peripheral applications requiring connectivity to a PC or cellular phone. Their aggressive price point and high level of integration pushes their scope of use far into the cost-sensitive, high-volume consumer market.
- Incorporates the ARM7TDMI® ARM® Thumb® Processor
- High-performance 32-bit RISC Architecture
- High-density 16-bit Instruction Set
- Leader in MIPS/Watt
- EmbeddedICE™ In-circuit Emulation, Debug Communication Channel Support
- Internal High-speed SRAM, Single-cycle Access at Maximum Speed
- 64 Kbytes (SAM7S512/256)
- 32 Kbytes (SAM7S128)
- 16 Kbytes (SAM7S64)
- 8 Kbytes (SAM7S321/32)
- 4 Kbytes (SAM7S161/16)
- Memory Controller (MC)
- Embedded Flash Controller, Abort Status and Misalignment Detection
- Reset Controller (RSTC)
- Based on Power-on Reset and Low-power Factory-calibrated Brown-out Detector
- Provides External Reset Signal Shaping and Reset Source Status
- Clock Generator (CKGR)
- Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and one PLL
- Power Management Controller (PMC)
- Software Power Optimization Capabilities, Including Slow Clock Mode (Down to 500 Hz) and Idle Mode
- Three Programmable External Clock Signals
