Product Descriptions

The AT91M55800A is a member of the Atmel AT91 16/32-bit microcontroller family, which is based on the ARM7TDMI processor core. This processor has a high-performance 32-bit RISC architecture with a high-density 16-bit instruction set and very low power consumption. In addition, a large number of internally banked registers result in very fast exception handling, making the device ideal for real-time control applications.

The fully programmable External Bus Interface provides a direct connection to off-chip memory in as fast as one clock cycle for a read or write operation. An eight-level priority vectored interrupt controller in conjunction with the peripheral data controller significantly improve the real-time performance of the device. 

The device is manufactured using Atmel’s high-density CMOS technology. By combining the ARM7TDMI processor core with an on-chip SRAM, a wide range of peripheral functions, analog interfaces and low-power oscillators on a monolithic chip, the Atmel AT91M55800A is a powerful microcontroller that provides a highly-flexible and cost-effective solution to many ultra low-power applications.

Product Features

• 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 Watchdog Timer 

• 8-channel 10-bit ADC 

• 2-channel 10-bit DAC 

• Clock Generator with On-chip Main Oscillator and PLL for Multiplication 

– 3 to 20 MHz Frequency Range Main Oscillator

 • Real-time Clock with On-chip 32 kHz Oscillator 

– Battery Backup Operation and External Alarm 

• 8-channel Peripheral Data Controller for USARTs and SPIs

 • Advanced Power Management Controller (APMC) 

– Normal, Wait, Slow, Standby and Power-down modes

 • IEEE® 1149.1 JTAG Boundary-scan on all Digital Pins 

• Fully Static Operation: 0 Hz to 33 MHz 

• 2.7V to 3.6V Core Operating Range 

• 2.7V to 5.5V I/O Operating Range

 • 2.7V to 3.6V Analog Operating Range 

• 1.8V to 3.6V Backup Battery Operating Range 

• 2.7V to 3.6V Oscillator and PLL Operating Range 

• -40°C to +85°C Temperature Range 

• Available in a 176-lead LQFP (Green) and a 176-ball BGAPackage (RoHS-compliant)

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