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Section 3
Board Description
3.1
AT91SAM7A3
Microcontroller
! 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
! 256 Kbytes of Internal High-speed Flash, Organized in 1024 Pages of 256 Bytes
– 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
! 32K Bytes of Internal High-speed SRAM, Single-cycle Access at Maximum Speed
! Memory Controller (MC)
– Embedded Flash Controller, Abort Status and Misalignment Detection
– Memory Protection Unit
! Reset Controller (RSTC)
– Based on Three Power-on Reset Cells
– Provides External Reset Signal Shaping and Reset Sources Status
! Clock Generator (CKGR)
– Low-power RC Oscillator, 3 to 20 MHz On-chip Oscillator and One PLL
! Power Management Controller (PMC)
– Power Optimization Capabilities, including Slow Clock Mode (Down to 500
Hz), Idle Mode, Standby Mode and Backup Mode
– Four Programmable External Clock Signals
! Advanced Interrupt Controller (AIC)
– Individually Maskable, Eight-level Priority, Vectored Interrupt Sources
AT91SAM7A3-EK Evaluation Board User Guide
3-1
6165C–ATARM–26-Jun-06
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