AT91SAM7S256-AU

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(Continue ...)

Key Features

• Suitable for industrial control systems applications
• USB 2.0 interface supports data transfer rates up to 1 MB/s
• Fully functional in low-power sleep mode

Application

• Innovative solutions for consumer electronics
• Smart automation for industrial processes
• Efficient automotive systems design