What voltages are supported? 5V? 3V3?

My boards are all 5v, have not tried 3.3v. Works on 5v with studio 7. I also bought the AVR programmer from Microchip, since my attiny1617 boards need the "one wire" programming method that this programmer doesn't support. Good luck!

What is the avrdude setup? i have been able to get it to work intermittently and very slowly with: avrdude -c avrisp2 -p com2 -p t13 -v -emyfile.hex

Im not sure about the 'speed' you expect but you have to make absolutely sure you use the same physical USB port once the drive is installed. Go look up Zadig USB driver installer. Also, I was not able to get that programmer to work properly until I used the 10 pin connector via an adapter into a 6 pin socket on my prototype board. https://www.amazon.com/Comimark-Convert-Standard-Adapter-AVRISP/dp/B07WZF6Z27/ref=sr_1_3?crid=3NTU71Z2RSE9J&dchild=1&keywords=10+pin+to+6+pin+adapter&qid=1606212565&sprefix=10+to+6+pin+adapter%2Caps%2C193&sr=8-3 the above made it possible to use Atmel Studio with the programmer (it sounds like you have a cable problem, as if the drivers were not properly installed, it would not work at all)

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Based on ATMEL official STK500 USB AVRISP CH AVR ISP high speed Programmer Compatible with AT AVRISP from ATMEL Supports AVR Studio 4/5/6/7 ISP_6PIN interface @XYGStudy

Product ID: 403031229

Details

Brand
XYG-AVR
Model Name
USB AVRISP CH
CPU Model
Intel Atom 230
Connectivity Technology
USB
Operating System
Win10

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Description

Based on ATMEL official STK500 USB AVRISP CH AVR ISP high speed Programmer Compatible with AT AVRISP from ATMEL Supports AVR Studio 4/5/6/7 ISP_6PIN interface @XYGStudy

Specifications

ASIN	B07B6NHG63
Best Sellers Rank	#798 in Computer CPU Processors
Brand	XYG-AVR
Built-In Media	USB AVRISP CH, USB cable, 6-pin to 10-pin ISP cable, 6-wire multicolour separated cable
CPU Model	Intel Atom 230
CPU Speed	3.69 MHz
Compatible Devices	AVR MCUs compatible with AVR Studio 4/5/6/7 and ISP_6PIN interface
Connectivity Technology	USB
Customer Reviews	3.8 out of 5 stars 16 Reviews
Included Components	USB AVRISP CH, USB cable, 6-pin to 10-pin ISP cable, 6-wire multicolour separated cable
Item Weight	0.01 Ounces
Manufacturer	XYG-AVR
Mfr Part Number	USB AVRISP CH
Model Name	USB AVRISP CH
Model Number	8541608482
Operating System	Win10
Processor Brand	Atmel/Microchip
Processor Count	1
Processor Speed	3.69 MHz
RAM Memory Technology	LPDDR3
Smart Home Compatibility	Not Smart Home Compatible
Total Usb Ports	1
UPC	756438185979
Unit Count	1.0 Count
Wireless Compability	802.11b

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