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

– 256 kbytes, organized in 1024 Pages of 256 Bytes (AT91SAM7S256)

– 128 kbytes, organized in 512 Pages of 256 Bytes (AT91SAM7S128)

– 64 kbytes, organized in 512 Pages of 128 Bytes (AT91SAM7S64)

– 32 kbytes, organized in 256 Pages of 128 Bytes (AT91SAM7S321/32)

– 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

– 64 kbytes (AT91SAM7S256)

– 32 kbytes (AT91SAM7S128)

– 16 kbytes (AT91SAM7S64)

– 8 kbytes (AT91SAM7S321/32)

• Memory Controller (MC)

– Embedded Flash Controller, Abort Status and Misalignment Detection

• Reset Controller (RSTC)

– Based on Power-on Reset and Low-power Factory-calibrated Brown-out 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)

– Software Power Optimization Capabilities, Including Slow Clock Mode (Down to 

500 Hz) and Idle Mode

– Three Programmable External Clock Signals

• Advanced Interrupt Controller (AIC)

– Individually Maskable, Eight-level Priority, Vectored Interrupt Sources

– Two (AT91SAM7S256/128/64/321) or One (AT91SAM7S32) 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

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