AT91SAM7X128-AU Programmable IC Chips Electronics Components Chip IC Electronics

AT91SAM7X128-AU Programmable IC Chips Electronics Components Chip IC Electronics

Incorporates the ARM7TDMI ARM Thumb Processor

FEATURES

• Incorporates the ARM7TDMI® ARM® Thumb® Processor

– High-performance 32-bit RISC Architecture

– High-density 16-bit Instruction Set

• Leader in MIPS/Watt

– EmbeddedICE™ In-circuit Emulation, Debug Communication Channel Support

• Internal High-speed Flash

– 512 Kbytes (AT91SAM7X512) Organized in Two Banks of 1024 Pages of 256 Bytes (Dual Plane)

– 256 Kbytes (AT91SAM7X256) Organized in 1024 Pages of 256 Bytes (Single Plane)

– 128 Kbytes (AT91SAM7X128) Organized in 512 Pages of 256 Bytes (Single Plane)

• 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 and I2 C Compatible Devices 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 100-lead LQFP Green and 100-ball TFBGA Green Packages

ABSOLUTE MAXIMUM RATINGS(1)

DESCRIPTION

The AT89C55WD is a low-power, high-performance CMOS 8-bit microcontroller with 20K bytes of Flash programmable read only memory and 256 bytes of RAM.

The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry standard 80C51 and 80C52 instruction set and pinout.

The on-chip Flash allows the program memory to be user programmed by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C55WD is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications.

The AT89C55WD provides the following standard features: 20K bytes of Flash, 256 bytes of RAM, 32 I/O lines, three 16-bit timer/counters, a six-vector, two-level interrupt architecture, a full-duplex serial port, on-chip oscillator, and clock circuitry.

In addition, the AT89C55WD is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port, and interrupt system to continue functioning.

The Power-down Mode saves the RAM contents but freezes the oscillator, disabling all other chip functions until the next external interrupt or hardware reset