poniedziałek, 21 września 2015

[EN] Xmega - Development board



Hello.

I've just finished build my Xmega128a3u Dev board.
It offers:

  • USART 
  • USB
  • TWI, aka I2C
  • Atmel DataFlash
  • 4x pushbuttons
  • 4x LED
  • SD card slot
  • 2 analog ports with exteral clamping diodes (PORTA & PORTB)
  • 1 digital port with current limiting resistor (PORTF)
  • External voltage reference

It can be programmed via PDI, or USB (using bootloader). Also it have two sources of power:
  1. From DC adapter - up to 12V
  2. From USB - with circuit which prevents overshoot

Ovierview of board:

TOP:


BOTTOM:




There are some unpopulated pads - it's because I have ordered wrong size of resistor ladder, but it isn't so crucial - just for digital IO.
Surely they will fit. :)

...and bodge wires. First is well visible:


Second one caused USART to stop working. I've forgotten add trace to Vcc from nearby via (pin 9):



Overview with grouped parts and its purpose: