AT91RM3400

The AT91RM3400 is a fully integrated member of the Atmel advanced AT91 ARM microcontroller family. Having no external memory interface and equipped with embedded SRAM and ROM, it is ideal for numerous applications with medium memory requirements but which demand high performance.Several options are available to download software to the internal SRAM. These include downloading from a serial EEPROM or serial DataFlash^® or downloading through the USB Device Port. Additionally, customizing of the embedded ROM is available on request for large volume opportunities.The Advanced Interrupt Controller (AIC) enhances the interrupt handling performance of the ARM7TDMI processor by providing multiple vectored, prioritized interrupt sources and reduces the cycles taken to transfer to an interrupt handler.

The Peripheral Data Controller (PDC) provides DMA channels for all the serial peripherals,enabling them to transfer data to or from on-chip memories without processor intervention. This reduces the processor overhead when dealing with transfers of continuous data streams.The set of Parallel I/O (PIO) Controllers multiplex the peripheral input/output lines with general-purpose data I/Os, reducing the external pin count of the device and providing an interrupt and open drain capability on each line.The Power Management Controller (PMC) keeps system power consumption to a minimum by selectively enabling and/or disabling the core and various peripherals under software control. It uses an enhanced clock generator to provide a selection of clock signals including a slow clock (32 kHz) for power-saving mode.

The wide range of system interfaces includes USB V2.0 Full-speed Device Port, Multimedia Card, Serial Peripheral Interface (SPI) and Two-wire Interface (TWI). Peripherals include multiple USARTs, Timer/Counters and Serial Synchronous Controllers (SSC).The AT91RM3400 includes an extensive set of peripherals that operate in accordance with several industry standards, such as those used in audio, communication, computer and smart card applications.