Product Overview

Atmel´s AT91SAM7X is a member of a series of highly integrated Flash microcontrollers based on the 32-bit ARM RISC processor.
It features 512/256/128 Kbyte high-speed Flash and 128/64/32 Kbyte SRAM, a large set of peripherals, including an 802.3 Ethernet MAC and a CAN controller. A complete set of system functions minimizes the number of external components.
The embedded Flash memory can be programmed in-system via the JTAG-ICE interface or via a parallel interface on a production programmer prior to mounting. Built-in lock bits and a security bit protect the firmware from accidental overwrite and preserve its confidentiality.
The AT91SAM7X system controller includes a reset controller capable of managing the power-on sequence of the microcontroller and the complete system. Correct device operation can be monitored by a built-in brownout detector and a watchdog running off an integrated RC oscillator.
By combining the ARM7TDMI processor with on-chip Flash and SRAM, and a wide range of peripheral functions, including USART, SPI, CAN Controller, Ethernet MAC, Timer Counter, RTT and Analog-to-Digital Converters on a monolithic chip, the AT91SAM7X is a powerful device that provides a flexible, cost-effective solution to many embedded control applications requiring communication over, for example, Ethernet, CAN wired and Zigbee® wireless networks.

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
• Internal High-speed Flash
  • 512 Kbytes (AT91SAM7X256) Organized in 2048 Pages of 256 Bytes
  • 256 Kbytes (AT91SAM7X256) Organized in 1024 Pages of 256 Bytes
  • 128 Kbytes (AT91SAM7X128) Organized in 512 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: 6 ms, Including Page Auto-erase, Full Erase Time: 15 ms
  • 10,000 Write Cycles, 10-year Data Retention Capability, Sector Lock Capabilities, Flash Security Bit
  • Fast Flash Programming Interface for High Volume Production
• Internal High-speed SRAM, Single-cycle Access at Maximum Speed
  • 128 Kbytes (AT91SAM7X512)
  • 64 Kbytes (AT91SAM7X256)
  • 32 Kbytes (AT91SAM7X128)
• Memory Controller (MC)
  • Embedded Flash Controller, Abort Status and Misalignment Detection
• Reset Controller (RSTC)
  • Based on Power-on Reset Cells and Low-power Factory-calibrated Brownout Detector
  • Provides External Reset Signal Shaping and Reset Source 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) and Idle Mode
  • Four Programmable External Clock Signals
• Advanced Interrupt Controller (AIC)
  • Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
  • Two 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 Signals to the System
  • Counter May Be Stopped While the Processor is in Debug State or in Idle Mode
• 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
• Thirteen Peripheral DMA Controller (PDC) Channels
• One USB 2.0 Full Speed (12 Mbits per second) Device Port
  • On-chip Transceiver, 1352-byte Configurable Integrated FIFOs
• One Ethernet MAC 10/100 base-T
  • Media Independent Interface (MII) or Reduced Media Independent Interface (RMII)
  • Integrated 28-byte FIFOs and Dedicated DMA Channels for Transmit and Receive
• One Part 2.0A and Part 2.0B Compliant CAN Controller
  • Eight Fully-programmable Message Object Mailboxes, 16-bit Time Stamp Counter
• One Synchronous Serial Controller (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
• Two 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
  • Full Modem Line Support on USART1
• Two Master/Slave Serial Peripheral Interfaces (SPI)
  • 8- to 16-bit Programmable Data Length, Four External Peripheral Chip Selects
• One Three-channel 16-bit Timer/Counter (TC)
  • Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel
  • Double PWM Generation, Capture/Waveform Mode, Up/Down Capability
• One Four-channel 16-bit Power Width Modulation Controller (PWMC)
• One Two-wire Interface (TWI)
  • Master Mode Support Only, All Two-wire Atmel EEPROMs Supported
• One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os
• SAM-BA™ Boot Assistance
  • Default Boot program
  • Interface with SAM-BA Graphic User Interface
• IEEE 1149.1 JTAG Boundary Scan on All Digital Pins
• 5V-tolerant I/Os, Including Four High-current Drive I/O lines, Up to 16 mA Each
• Power Supplies
  • Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and External Components
  • 3.3V VDDIO I/O Lines Power Supply, Independent 3.3V VDDFLASH Flash Power Supply
  • 1.8V VDDCORE Core Power Supply with Brownout Detector
• Fully Static Operation: Up to 55 MHz at 1.65V and 85°C Worst Case Conditions
• Available in a 100-lead LQFP Green Package