Mini Ultra Pro V3 (Without Radio)

Description

Version 3 of Mini Ultra Pro. We added a battery monitoring on pin A5. We also swap out the Spansion’s S25FL116K0XMFI041 serial flash with the faster Winbond’s W25Q16JVSSIM serial flash that comes in larger SOIC-8 208 mil package (vs SOIC-8 150 mil) which open up a whole range of larger memory size (larger than 16 Mbit).

This is our low power rendition of the Arduino Zero! We hit the limit (program flash, memory) on a custom board based on our beloved Mini Ultra 8 MHz board while doing a custom project for a client. As much as we want to make an ATMega2560 version of the Mini Ultra, the chip size (TQFP100) is just awfully too big for our liking and the price is unreasonable for an 8-bit microcontroller. In contrast, the 32-bit ARM Cortex M0+ ATSAMD21G18A provides plenty of processing power and peripherals at a reasonable cost. For the past 10 years, we have been actively involved in wireless sensor network and Mini Ultra Pro is the result of those hours and hours of developing what works in the field. The Mini Ultra Pro works great with our updated Arduino compatible low power library to allow flexible low power management of the board. This version comes WITHOUT the radio transceiver module.

Specifications:

• Compatible with Arduino IDE using “Arduino/Genuino Zero (Native USB Port)” as the board option
• Microcontroller – ATSAMD21G18A-AU
• Clock – 48 MHz
• Operating voltage – 3.3 V
• Low quiescent current (1.6 μA) on-board 3.3 V 250 mA low dropout regulator
• Ultra low power – Minimum 20.0 μA in sleep mode (known as standby mode on ATSAMD21G18A-AU) with a 4.2 V Li-Ion/Li-Pol battery as power source
• External DC source range – 5 – 10.5 V (over voltage protection up to 28 V)
• Battery charging management:
  • Power path management for proper charging process and load balancing
  • 400 mA battery charging current
  • 2 indicator LED for power good and charging process indication
• Suitable for battery operation (3.6 V Lithium-Ion/Polymer)
• Battery monitoring on pin A5 NEW
• On-board 2 MB (16 Mbit) serial flash for data logging
• On-chip RTC with calendar support (using the RTCZero library)
• On-board 64-bit (8-byte) unique global identifier MAC address provided by the 24AA02E64 chip
• Indicator LED connected to digital pin 13 through a MOSFET
• 500 mA fuse for USB port over current protection
• USB micro connector with 4 through hole pegs for reliability
• JST PH 2.0 mm battery connector for Li-Ion/Li-Pol batteries
• Side reset tact switch for easy access
• Native USB serial for code upload
• 10-pin 1.27 mm pitch for ARM Cortex SWD (SMD mounted on the board)
• 900 mil in between 2 breakout headers – suitable for breadboard usage
• Dimension – 25.4 mm x 55.88 mm (1.0″ x 2.2″)
• RoHS compliant – Yes
• Comes with a free 2.54 mm 1×40 pin header

Documentation:

• Design files on Github
• Schematic (pdf)
• Arduino compatible low power library on Github
• Getting started guide