Board Description
Software selectable, 32768Hz Low-power external standard crystal Oscillator or Internal Low Power
RC Oscillator
3.6
3.7
3.8
3.9
3.10
3.11
3.12
Reset Circuitry
Internal reset controller with bi-directional reset pin
External reset pushbutton
Shutdown Controller
Programmable shutdown and Wake-Up
Wake-up push button
Power Supply Circuitry
On-board 1.2V High Efficiency step-down charge pump regulator with shutdown control
On-board 3.3V linear regulator with shutdown control
Remote Communication
One serial interface (DBGU COM Port) via RS-232 DB9 male socket
One additional serial interface (COM Port 1) with RTS/CTS handshake control via RS-232 DB9 male
socket
One High Speed USB 2.0 port 480 Mbits per second (UDP)
Audio Stereo Interface
One AC97 audio CODEC with:
One 32 Ohm Stereo Headset output (J16) with master volume and mute controls
One line-in
One Mono/Stereo Microphone input.
User Interface
Two user input pushbuttons
Two user green LED
One yellow power LED (can be also software controlled)
Debug Interface
20-pin JTAG/ICE interface connector
DBGU COM port
AT91SAM9RL-EK Evaluation Board User Guide
3-5
6325C–ATARM–22-Jul-10
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