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Section 3
Board Description
3.1
AT91SAM9G20 Microcontroller
? Incorporates the ARM926EJ-S ? ARM ? Thumb ? Processor
– DSP Instruction Extensions, ARM Jazelle ? Technology for Java ? Acceleration
– 32-KByte Data Cache, 32-KByte Instruction Cache, Write Buffer
– CPU Frequency 400 MHz
– Memory Management Unit
– EmbeddedICE ? , Debug Communication Channel Support
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Additional Embedded Memories
– One 64-KByte Internal ROM, Single-cycle Access at Maximum Matrix Speed
– Two 16-KByte Internal SRAM, Single-cycle Access at Maximum Matrix Speed
External Bus Interface (EBI)
– Supports SDRAM, Static Memory, ECC-enabled NAND Flash and CompactFlash ?
USB 2.0 Full Speed (12 Mbits per second) Device Port
– On-chip Transceiver, 2,432-byte Configurable Integrated DPRAM
USB 2.0 Full Speed (12 Mbits per second) Host and Double Port
– Single or Dual On-chip Transceivers
– Integrated FIFOs and Dedicated DMA Channels
Ethernet MAC 10/100 Base T
– Media Independent Interface or Reduced Media Independent Interface
– 12 8 -byte FIFOs and Dedicated DMA Channels for Receive and Transmit
Image Sensor Interface
– ITU-R BT. 601/656 External Interface, Programmable Frame Capture Rate
– 12-bit Data Interface for Support of High Sensibility Sensors
– SAV and EAV Synchronization, Preview Path with Scaler, YCbCr Format
Bus Matrix
– Six 32-bit-layer Matrix
– Boot Mode Select Option, Remap Command
Fully-featured System Controller, including
– Reset Controller, Shutdown Controller
– Four 32-bit Battery Backup Registers for a Total of 16 Bytes
– Clock Generator and Power Management Controller
– Advanced Interrupt Controller and Debug Unit
– Periodic Interval Timer, Watchdog Timer and Real-time Timer
Reset Controller (RSTC)
– Based on a Power-on Reset Cell, Reset Source Identification and Reset Output Control
Clock Generator (CKGR)
– Selectable 32,76 8 Hz Low-power Oscillator or Internal Low Power RC Oscillator on Battery Backup
Power Supply, Providing a Permanent Slow Clock
– 3 to 20 MHz On-chip Oscillator, One up to 8 00 MHz PLL and One up to 100 MHz PLL
AT91SAM9G20-EK Evaluation Board User Guide
3-1
6413C–ATARM–18-Feb-09
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