AT91SAM7X256B-AU ARM 256k microcontroller

Atmel's AT91SAM7X256B-AU is a member of a series of highly integrated Flash microcontrollers based on the 32-bit ARM RISC processor. It features 256 Kbyte high-speed Flash and 64 Kbyte SRAM, a large set of peripherals, including an 802.3 Ethernet MAC and a CAN controller. A complete set of system functions minimizes the number of external components.

The embedded Flash memory can be programmed in-system via the JTAG-ICE interface, using the AT91SAM-ICE (73-4262), 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 preserve its confidentiality. The AT91SAM7X256 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.

• 256KByte of Flash memory
• 64KByte of SRAM
• Housed in an LQFP100 package
• High density 16-bit instruction set
• Leading device in MIPS/W
• EmbeddedICE In-circuit emulation
• 10,000 Write cycles and 10-year data retention
• Advanced power management functions
• Embedded Flash controller
• Periodic interval timer
• Watchdog