µ[micro]electronics info

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Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.

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ARM7TDMI dev board from Olimex

Ethernet, 2 serial, USB, Memory and other interfaces on a $120 board.


* MCU: AT91SAM7X256 16/32 bit ARM7TDMI™ with 256K Bytes Program Flash, 64K Bytes RAM, CAN, USB 2.0, Ethernet 10/100, RTT, 10 bit ADC 384 ksps, 2x UARTs, TWI (I2C), 2x SPI, 3x 32bit TIMERS, 4x PWM, SSC, WDT, PDC (DMA) for all peripherals, up to 55 MHz operation
* standard JTAG connector with ARM 2x10 pin layout for programming/debugging with ARM-JTAG
* NOKIA 6610 128x128 TFT 12 bit COLOR LCD with back light
* Ethernet 10/100 PHY with KS8721BL
* USB connector
* Two channel RS232 interface and drivers
* SD/MMC card connector
* Joystick with 4 direction and push action
* two buttons
* Audio in and Audio Out jacks for microphone and headphones
* on board Speaker with volume control potentiometer
* trimpot connected to ADC
* thermistor connected to ADC
* on board voltage regulator 3.3V with up to 800mA current
* single power supply: 6V AC or DC required, board can take power from USB port too
* power supply LED
* power supply filtering capacitor
* RESET circuit , RESET button
* 18.432 Mhz crystal on socket
* extension headers for all uC ports
* PCB: FR-4, 1.5 mm (0,062"), soldermask, silkscreen component print
* Dimensions: 128 x 98 mm (5 x 3.8")

Olimex AT91SAM7X256 development prototype board

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