User manual

Board Description

AT91SAM7X-EK Evaluation Board User Guide 3-9

6195E–ATARM–22-Mar-07

3.6 Memory ! 256 Kbytes of Internal High-speed Flash

! 64 Kbytes of Internal High-speed SRAM

! Atmel serial DataFlash

! One footprint for Atmel Serial EEPROM memory. The user can fit an AT24C128AN or

AT24C256AN or AT24C512AN in 8S1 package as well as a cryptomemory

AT88C25616C-SI

3.7 Clock Circuitry ! 18.432 MHz standard crystal for the embedded oscillator

! 32 KHz internal RC oscillator

3.8 Reset Circuitry ! Internal reset controller with a bidirectional reset pin

! External reset pushbutton

3.9 Power Supply

Circuitry

! USB powered, the dynamic power consumption on VDDCORE is less than 90 mA at

full speed when running out of the Flash. The total current at power-up is less than

100 mA.

! External power can be applied via USB Power adapter 5V 0.5A with USB A/B cable

! On-chip embedded VDDCORE 1.8V regulator

! On-board 3.3V 400 mA linear regulator

3.10 Remote

Communication

! One Serial interface (DBGU COM Port) via RS-232 DB9 male socket

! One Serial interface (RS232 COM Port) via RS-232 DB9 male socket

! USB V2.0 Full-speed compliant, 12 Mbits per second (UDP)

! One CAN 2.0B communication port via the 3-position printed circuit terminal block

! One MII Ethernet 100-base TX (auto MDI/MDI-X crossover cable)

3.11 Analog Interface ! One selectable 0.2% 3.00V Vref or 3.3V ANA

! One 3-position printed circuit terminal block

! Two analog up to Vref inputs. One external user input and one back-looped with

buffered PWM3 output.

! One buffered PWM3 analog output (up to Vref)

3.12 User Interface ! One 5-way joystick (4 directions and push for confirmation)

! Four general-purpose buffered green user LEDs (PWM controlled)