描述 Description

Atmel’s SAM7S 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 SAM7S32 and SAM7S16), 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.

特性 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 (SAM7S512) Organized in Two Contiguous Banks of 1024 Pages of 256 Bytes (Dual Plane)

– 256 Kbytes (SAM7S256) Organized in 1024 Pages of 256 Bytes (Single Plane)

– 128 Kbytes (SAM7S128) Organized in 512 Pages of 256 Bytes (Single Plane)

– 64 Kbytes (SAM7S64) Organized in 512 Pages of 128 Bytes (Single Plane)

– 32 Kbytes (SAM7S321/32) Organized in 256 Pages of 128 Bytes (Single Plane)

– 16 Kbytes (SAM7S161/16) 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 (SAM7S512/256)

– 32 Kbytes (SAM7S128)

– 16 Kbytes (SAM7S64)

– 8 Kbytes (SAM7S321/32)

– 4 Kbytes (SAM7S161/16)

? 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 (SAM7S512/256/128/64/321/161) or One (SAM7S32/16) External Interrupt Source(s) and One Fast Interrupt Source, Spurious Interrupt Protected

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