PD Micro – A Pro Micro with USB-C Power Delivery

PD Micro is the first Arduino-compatible board with USB-C power delivery. The pins are compatible with Pro micro. PD Micro allows you to control high voltage easily from USB-C Power delivery. It’s useful for applications that require voltage higher than 5V – like motor control or a high-power LED.

New USB-C Power Delivery Library

PD Micro is accompanied by our newly-implemented, simple, compact, USB-C power delivery library. This was written over the course of porting the code for PD Micro. We ended up writing a library completely from scratch. The result is a simple, compact, portable source code for USB-C device only application, which can be put inside ATmega328/ATmega32U4.

Specifications:

• Microcontroller: ATmega32U4 running at 5V/16MHz
• Voltage Regulator: TPS62175 DC-DC for efficient 5-20V to 5V
• USB-C PHY: FUSB302 (USB PD communication on CC pins)
• ESD protection on D+/D-/CC1/CC2 pins
• Pinout: (pin compatible to Pro Micro)
  • 9x 10-bit ADC pins
  • 12x Digital I/Os (INT and I2C bus are shared with FUSB302)
  • 5x GND pins
  • 3x VBUS pins (USB-C power)
  • 1x 5V pin (DC-DC output)
• Status LEDs:
  • TX / RX
  • 5 LED for Power Delivery voltage level
  • 3 LED for Power Delivery current level
• Reset button
• USB-C port for programming and power delivery
• 3.5 mm 2 pos Terminal Jack for power output
• Four layer PCB with ground plane and 3 mm wide VBUS trace
• Size: 1.6 x 0.7 inches (extra 0.3 inches for power connector pins)

Features:

• Set power delivery voltage output level by updating code through Arduino IDE
• New USB Power delivery protocol library for UFP(device):
  • Written from draft, not base on any existing library
  • Simple, size optimized, more than half of RAM and Code space in ATmega32 are available to user
  • Highly portable code
  • Fully open source

The project will soon launch on www.crowdsupply.com, stay tuned.

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