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AT91SAM7S256_0504 Datasheet, PDF (1/33 Pages) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers | |||
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Features
⢠Incorporates the ARM7TDMI® ARM® Thumb® Processor
â High-performance 32-bit RISC Architecture
â High-density 16-bit Instruction Set
â Leader in MIPS/Watt
â Embedded ICE In-circuit Emulation, Debug Communication Channel Support
⢠256 Kbytes of Internal High-speed Flash, Organized in 1024 Pages of 256 Bytes
â Single Cycle Access at Up to 30 MHz in Worst Case Conditions
â Prefetch Buffer Optimizing Thumb Instruction Execution at Maximum Speed
â Page Programming Time: 4 ms, Including Page Auto-erase, Full Erase Time: 10 ms
â 10,000 Write Cycles, 10-year Data Retention Capability, Sector Lock Capabilities,
Flash Security Bit
â Fast Flash Programming Interface for High Volume Production
⢠64 Kbytes of Internal High-speed SRAM, Single-cycle Access at Maximum Speed
⢠Memory Controller (MC)
â Embedded Flash Controller, Abort Status and Misalignment Detection
⢠Reset Controller (RSTC)
â Based on Power-on Reset and Low-power Factory-calibrated Brown-out Detector
â Provides External Reset Signal Shaping and Reset Source Status
⢠Clock Generator (CKGR)
â Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and one PLL
⢠Power Management Controller (PMC)
â Software Power Optimization Capabilities, Including Slow Clock Mode (Down to
500 Hz) and Idle Mode
â Three Programmable External Clock Signals
⢠Advanced Interrupt Controller (AIC)
â Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
â Two External Interrupt Sources and One Fast Interrupt Source, Spurious Interrupt
Protected
⢠Debug Unit (DBGU)
â 2-wire UART and Support for Debug Communication Channel interrupt,
Programmable ICE Access Prevention
⢠Periodic Interval Timer (PIT)
â 20-bit Programmable Counter plus 12-bit Interval Counter
⢠Windowed Watchdog (WDT)
â 12-bit key-protected Programmable Counter
â Provides Reset or Interrupt Signals to the System
â Counter May Be Stopped While the Processor is in Debug State or in Idle Mode
⢠Real-time Timer (RTT)
â 32-bit Free-running Counter with Alarm
â Runs Off the Internal RC Oscillator
⢠One Parallel Input/Output Controller (PIOA)
â Thirty-two Programmable I/O Lines Multiplexed with up to Two Peripheral I/Os
â Input Change Interrupt Capability on Each I/O Line
â Individually Programmable Open-drain, Pull-up resistor and Synchronous Output
⢠Eleven Peripheral DMA Controller (PDC) Channels
⢠One USB 2.0 Full Speed (12 Mbits per second) Device Port
â On-chip Transceiver, 328-byte Configurable Integrated FIFOs
AT91 ARM®
Thumb®-based
Microcontrollers
AT91SAM7S256
Summary
Preliminary
6117BSâATARMâ07-Apr-05
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