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Preliminary

AT91SAM7A3 Preliminary

6042AS–ATARM–23-Dec-04

– Individual Baud Rate Generator, IrDA Infrared Modulation/Demodulation

– Support for ISO7816 T0/T1 Smart Card, Hardware Handshaking, RS485 Support

– 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects

– Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel

– Double PWM Generation, Capture/Waveform Mode, Up/Down Capability

– 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

– Master Mode Support Only, All Two-wire Atmel EEPROM’s Supported

– Compliant with Multimedia Cards and SD Cards

– Automatic Protocol Control and Fast Automatic Data Transfers with PDC, MMC and SDCard Compliant

– 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

Description

The AT91SAM7A3 is a member of a series of 32-bit ARM7

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.