Description
Atmel’s AT91SAM7S is a series of low pincount Flash
microcontrollers based on the 32-bit ARM RISC processor. It
features a high-speed Flash and an SRAM, a large set of
peripherals, including a USB 2.0 device (except for the AT91SAM7S32
and AT91SAM7S16), and a complete 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
performance and extended memory.
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 (AT91SAM7S512) Organized in Two Contiguous Banks of
1024 Pages of 256 Bytes (Dual Plane)
– 256 Kbytes (AT91SAM7S256) Organized in 1024 Pages of 256 Bytes
(Single Plane)
– 128 Kbytes (AT91SAM7S128) Organized in 512 Pages of 256 Bytes
(Single Plane)
– 64 Kbytes (AT91SAM7S64) Organized in 512 Pages of 128 Bytes
(Single Plane)
– 32 Kbytes (AT91SAM7S321/32) Organized in 256 Pages of 128 Bytes
(Single Plane)
– 16 Kbytes (AT91SAM7S161/16 Organized in 256 Pages of 64 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
– 64 Kbytes (AT91SAM7S512/256)
– 32 Kbytes (AT91SAM7S128)
– 16 Kbytes (AT91SAM7S64)
– 8 Kbytes (AT91SAM7S321/32)
– 4 Kbytes (AT91SAM7S161/16)
• 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 (AT91SAM7S512/256/128/64/321/161) or One (AT91SAM7S32/16)
External Interrupt Source(s) 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
– Mode for General Purpose 2-wire UART Serial Communication
• 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
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