Adafruit High Voltage UPDI Friend - USB Serial UPDI Programmer

SKU: ADA5893 Brand: Adafruit

UPDI stands for Unified Program and Debug Interface, but this board is so smol and cute that we will call it the Unusually Playful Device Interfacer and...

$20.50 AUD, inc GST

$18.64 AUD, exc GST

Available with a lead time
Expect dispatch between May 17 and May 20

Quantity Discounts:

10-25 $17.89 (exc GST)
25+ $17.34 (exc GST)

UPDI stands for Unified Program and Debug Interface, but this board is so smol and cute that we will call it the Unusually Playful Device Interfacer and pat its head when it does a good job. It's designed to make programming modern ATtiny chips very easy because it has 3V or 5V power and logic select, power, and transmit indicator LEDs, and a quick cable for poking into a breadboard.

Unlike Adafruit's simple UPDI version, this board is HV for High Voltage because it will let you send a quick 12V pulse to the UPDI like right before programming. This is required for when the chip is configured to use the UPDI pin as a reset or GPIO. This board will also let you 'unbrick' any chip configured for HV usage, you can use it to reset the fuses for Low Voltage programming.

As for Adafruit's seesaw boards, Adafruit have been working a lot with ATtiny816, ATtiny817, and ATtiny1616 chips lately. And Adafruit are often needing to program them with a CP2102-based breakout with a 1K resistor soldered between the RX and TX pins. But Adafruit were hankering for a nicer programmer!

This UPDI High Voltage Friend makes programming such chips very easy:

Select between 3V or 5V power and logic - the 3V regulator can source up to 500mA to run even big projects.
Internal 12V boost converter with analog switch that will send a pulse to the UPDI line when the RTS pin is toggled low.
CH340E USB Serial converter chip with cross-platform drivers
1K Loop-back Resistor between RX and TX
USB Type C for data and power connection to any computer
JST SH cable included for quick plugging into a breadboard - you can get another JST SH 3-pin cable with sockets or with pin header here.
0.1" spaced breakout holes for custom connections.
Green power OK LED
Red serial activity LED
Inspired by this open-source hardware design from Stefan Wagner!

Adafruit use Arduino IDE with the megaTinyCore board support package installed; simply select "Serial UPDI" as the programmer type. Adafruit use 230Kbps, but 56Kbps is also good. In order to enable the high-voltage fuses settings, you'll need to edit boards.txt to remove the # comment tag on the “UPDI/RESET PIN CONFIGURATION” lines.

Technical Details

Product Dimensions: 29.0mm x 17.7mm x 4.9mm / 1.1" x 0.7" x 0.2"

Product Weight: 2.5g / 0.1oz

This product is listed in:

Programmers>Other

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