AT91SAM7S256D-MU

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 16bit 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)
• Serial peripheral interface (SPI)
• One three-channel 16-bit Timer/counter (TC)
• One four-channel 16-bit PWM controller (PWMC)
• One two-wire interface (TWI)
• SAM-BA™ boot assistant
• IEEE® 1149.1 JTAG boundary scan on all digital pins