AT91M55800A-33AU

The AT91M55800A is a member of the Microchip AT91 16/32-bit microcontroller family,which is based on the ARM7TDMI processor core. This processor has a high-performance32-bit RISC architecture with a high-density 16-bit instruction set and very lowpower consumption. In addition, a large number of internally banked registers result invery fast exception handling, making the device ideal for real-time controlapplications. The fully programmable External Bus Interface provides a direct connection to off-chip memory in as fast as one clockcycle for a read or write operation. An eight-level priority vectored interrupt controller in conjunction with the peripheral datacontroller significantly improve the real-time performance of the device.The device is manufactured using Microchip’s high-density CMOS technology. By combining the ARM7TDMI processor corewith an on-chip SRAM, a wide range of peripheral functions, analog interfaces and low-power oscillators on a monolithicchip, the Microchip AT91M55800A is a powerful microcontroller that provides a highly-flexible and cost-effective solution tomany ultra low-power applications.

• Utilizes the ARM7TDMI® ARM® Thumb® Processor Core
  • High-performance 32-bit RISC Architecture
  • High-density 16-bit Instruction Set
  • Leader in MIPS/Watt
  • EmbeddedICE™ (In-Circuit Emulation)
• 8K Bytes Internal SRAM
• Fully-programmable External Bus Interface (EBI)
  • Maximum External Address Space of 128M Bytes
  • Eight Chip Selects
  • Software Programmable 8/16-bit External Databus
• 8-level Priority, Individually Maskable, Vectored Interrupt Controller
  • Seven External Interrupts, Including a High-priority, Low-latency Interrupt Request
• Fifty-eight Programmable I/O Lines
• 6-channel 16-bit Timer/Counter
  • Six External Clock Inputs and Two Multi-purpose I/O Pins per Channel
• Three USARTs
• Master/Slave SPI Interface
  • 8-bit to 16-bit Programmable Data Length
  • Four External Slave Chip Selects
• Programmable Watchd