AT91SAM7S256D-MU Datasheet PDF - Microchip

●The AT91SAM7S256D-MU is a SAM7S series 32-bit Flash Microcontroller based on the 32-bit ARM7TDMI RISC processor. It operates at a maximum speed of 55MHz and features 128kB of flash memory and 64kB of SRAM. 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 SAM7S Series 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. It achieves single-cycle instruction access from embedded flash at 27MIPS. The multi-layer bus matrix, multiple SRAM banks, PDC and DMA support parallel tasks and maximize data throughput.

● 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

● Embedded flash controller, abort status and misalignment detection

● Reset controller (RSTC)

● Clock generator (CKGR)

● Power management controller (PMC)

● Advanced interrupt controller (AIC)

● Debug unit (DBGU)

● Periodic interval timer (PIT)

● Windowed watchdog (WDT)

● Real-time timer (RTT)

● One parallel I/O controller (PIOA)

● Peripheral DMA controller (PDC)

● One USB 2.0 full speed (12Mbps) device port

● One synchronous serial controller (SSC)

● Universal synchronous/asynchronous receiver transmitters (USART)

● One master/slave serial peripheral interface (SPI)