Board Description
3-2 AT91SAM7A3-EK Evaluation Board User Guide
6165C–ATARM–26-Jun-06
– Four External Interrupt Sources and One Fast Interrupt Source, Spurious
Interrupt Protected
! Debug Unit (DBGU)
– 2-wire UART and Support for Debug Communication Channel interrupt
! Periodic Interval Timer (PIT)
– 20-bit Programmable Counter plus 12-bit Interval Counter
! Windowed Watchdog (WDT)
– 12-bit key-protected Programmable Counter
– Provides Reset or Interrupt Signal to the System
– Counter May Be Stopped While the Processor is in Debug Mode or in Idle
State
! Real-time Timer (RTT)
– 32-bit Free-running Counter with Alarm
– Runs Off the Internal RC Oscillator
! Two Parallel Input/Output Controllers (PIO)
– Sixty-two Programmable I/O Lines Multiplexed with up to Two Peripheral I/Os
– Input Change Interrupt Capability on Each I/O Line
– Individually Programmable Open-drain, Pull-up resistor and Synchronous
Output
! Shutdown Controller (SHDWC)
– Programmable Shutdown Pin and Wake-up Circuitry
! Two 32-bit Battery Backup Registers for a Total of 8 Bytes
! One 8-channel 20-bit PWM Controller (PMWC)
! One USB 2.0 Full Speed (12 Mbits per Second) Device Port
– On-chip Transceiver, 2-Kbyte Configurable Integrated FIFOs
! Nineteen Peripheral Data Controller (PDC) Channels
! Two CAN 2.0B Active Controllers, Supporting 11-bit Standard and 29-bit Extended
Identifiers
– 16 Fully Programmable Message Object Mailboxes, 16-bit Time Stamp
Counter
! Two 8-channel 10-bit Analog-to-Digital Converter
! Three Universal Synchronous/Asynchronous Receiver Transmitters (USART)
– Individual Baud Rate Generator, IrDA
®
Infrared Modulation/Demodulation
– Support for ISO7816 T0/T1 Smart Card, Hardware Handshaking, RS485
Support
! Two Master/Slave Serial Peripheral Interfaces (SPI)
– 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects
! Three 3-channel 16-bit Timer/Counters (TC)
– Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel
– Double PWM Generation, Capture/Waveform Mode, Up/Down Capability
