Technical Details

• Dimensions: 37 x 28.5 mm
• Parts Supported:
  • Designed for the AVR DD series with 14 pin SOIC narrow or 20 pin SOIC wide package, VDD pin 14/20, VDD2 pin 9/15, GND pin 1
  • UPDI pin 3 Programming
  • AVR16DD14/20, AVR32DD14/20, AVR64DD14/20 (SMD)
• Support for a separate VDDIO2 available
• Up to 15 MOSFET or BJT drivers supported with 20 pin packages or 9 with the 14 pin packages
• Programming using the UPDI port
• Various 0805 resistors and capacitors

AVR64DD14,20 Data Sheet

AVR16/32DD14/20 Data Sheet

The DxCore board file is available for the Arduino IDE

It can be installed manually or through the Boards Manager.

Description

The AVR SOIC20 development board supports a variety of AVR DD Series 14 and 20 pin SMD parts with a UPDI programming option (See the Board Details for a list of devices). The SOIC14 parts are in a narrow package with VDD on pin 14, GND on Pin 1, and the UPDI on pin 3. The SOIC20 parts are a wide package with VDD on pin 20, GND on Pin 1, and the UPDI on pin 3.

Connections to all IO pins are provided (Referenced as RST, UPDI, An/Cn/Dn)) as well as a sub set of connections through SMD resistors and MOSFET drivers. A total of 15 MOSFET transistors are available for the 20-pin package or optionally a bipolar junction transistor (BJT) can be used. For the 14-pin package up to 9 transistors are available. The only outputs that do not have a transistor option are Pins 2 & 3. See the IO Pin Connection Planning Guide at the end of this document for details.

A dedicated power connection is provided (PW) and other connection areas are marked as power (+) and ground (GND/G) for sourcing other components. The power supply range is determined by the selection of U1, typically 1.8-5.5 volts.

The IO outputs are setup to support 2.54mm pin strip headers so that the board can be used in bread boarding a design. Programming can be accomplished using the UPDI header to program the mounted part on the board. I also have available a soft touch programming cable (No UPDI socket needed). There are many YouTube videos on Arduino programming options and I discuss my favorite in the UPDI Header section.

This board was designed to be as small as possible while providing numerous connection options and a set of MOSFET drivers for LED lighting in scale model builds. Typically used in scale model builds, dioramas or other areas where a small compact SoC (System on a chip) is needed.

To assemble this circuit board you must be comfortable soldering surface mounted parts as small as 0805. A full assembly and usage guide is available in the "doc" folder.

Purchase Options

Blank PCB is the default.

• Option 1/2: Board assembly with
  • AVR 32DD14 or AVR64DD20
  • All decoupling capacitors
  • This option will include all 9 or 15 MOSFETS loaded with their corresponding 470Ω resistors
  • Parts listed as OPTIONAL will NOT be loaded (UPDI/PW Header, C2, C3 (VDDIO2))