AT91SAM7A3

Features:

•Incorporates the ARM7TDMI ^® ARM^® Thumb^® Processor
High-performance 32-bit RISC Architecture
High-density 16-bit Instruction Set
Leader in MIPS/Watt
•Embedded ICE In-circuit Emulation, Debug Communication Channel Support
•256 Kbytes of Internal High-speed Flash, Organized in 1024 Pages of 256 Bytes
Single Cycle Access at Up to 30 MHz in Worst Case Conditions
Prefetch Buffer Optimizing Thumb Instruction Execution at Maximum Speed
Page Programming Time: 4 ms, Including Page Auto-erase, Full Erase Time: 10 ms
10,000 Write Cycles, 10-year Data Retention Capability, Sector Lock Capabilities
•32K Bytes of Internal High-speed SRAM, Single-cycle Access at Maximum Speed
•Memory Controller (MC)
Embedded Flash Controller, Abort Status and Misalignment Detection
Memory Protection Unit
•Reset Controller (RSTC)
Based on Three Power-on Reset Cells
Provides External Reset Signal Shaping and Reset Sources Status
•Clock Generator (CKGR)
Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and One PLL
•Power Management Controller (PMC)
Power Optimization Capabilities, including Slow Clock Mode (Down to 500 Hz), Idle Mode, Standby Mode and Backup Mode
Four Programmable External Clock Signals
•Advanced Interrupt Controller (AIC)
Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
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, Programmable ICE Access Prevention
•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
•Four 32-bit Battery Backup Registers for a Total of 16 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
•Two Synchronous Serial Controllers (SSC)
Independent Clock and Frame Sync Signals for Each Receiver and Transmitter
I²S Analog Interface Support, Time Division Multiplex Support
High-speed Continuous Data Stream Capabilities with 32-bit Data Transfer
•One Two-wire Interface (TWI)
Master Mode Support Only, All Two-wire Atmel EEPROM's Supported
•Multimedia Card Interface (MCI)
Compliant with Multimedia Cards and SD Cards
Automatic Protocol Control and Fast Automatic Data Transfers with PDC, MMC and SDCard Compliant
•IEEE 1149.1 JTAG Boundary Scan on All Digital Pins
•Required Power Supplies:
Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and the External Components, Enables 3.3V Single Supply Mode
3.3 VDDIO I/O Lines and Flash Power Supply
1.8V VDDCORE Core Power Supply
3V to 3.6V VDDANA Analog Power Supply
3V to 3.6V VDDBU Backup Power Supply
•5V-tolerant I/Os
•Fully Static Operation: 0 Hz to 60 MHz at 1.65V and 85°C Worst Case Conditions
•Available in a 100-lead LQFP Package



Pinout




Description

    The AT91SAM7A3 is a member of a series of 32-bit ARM7® microcontrollers with an integrated CAN controller. It features a 256-Kbyte high-speed Flash and 32-Kbyte SRAM, a large set of peripherals, including two 2.0B full CAN controllers, and a com-plete set of system functions minimizing the number of external components. The device is an ideal migration path for 8-bit microcontroller users looking for additional per-formance and extended memory.The embedded Flash memory can be programmed in-system via the JTAG-ICE inter-face. Built-in lock bits protect the firmware from accidental overwrite.

    The AT91SAM7A3 integrates a complete set of features facilitating debug, including a JTAG In-Circuit-Emulation interface, misalignment detector, interrupt driven debug com-munication channel for user configurable trace on a console, and JTAG boundary scan for board level debug and test.

    By combining a high-performance 32-bit RISC processor with a high-density 16-bit instruction set, Flash and SRAM memory, a wide range of peripherals including CAN controllers, 10-bit ADC, Timers and serial communication channels, on a monolithic chip, the AT91SAM7A3 is ideal for many compute-intensive embedded control applica-tions in the automotive, medical and industrial world.