USB to I2C/IIC/SPI/UART/TTL/ISP Serial adapter EPP/MEM Converter Module | eBay
Devantech USB to UART, I2C, SPI, serial adapter (USB-ISS) | Acroname
CSR "Babelfish" USB-SPI 1324 Converter
USB SPI click - Breakout board for MCP2210 USB to SPI converter
USB Port Converter Module, USB To UART IIC SPI TTL ISP EPP MEM CH341A Chip USB Serial Port Adapter With Working Status Indicator For Program Debugging - Walmart.com
USB Serial Port Adapter, Bus Communication 3.3V 5V USB Port Converter Module CH341A Chip With Working Status Indicator For STC Microcontroller Programming - Walmart.com
USB To UART/I2C/SPI/JTAG Converter, Supports Multiple Interfaces, Compatible with 3.3V and 5V, Multiple Protection Circuits, Multiple Systems Support, Aluminum Alloy Case, Wall-mount & Rail-mount Support
FT232H Multifunction USB to JTAG UART FIFO SPI I2C Converter Module
Amazon.com: USB Port Converter Module USB Converter Module Serial Parallel to UART IIC SPI TTL ISP EPP MEM Components CH341A : Electronics
CH341A USB to SPI I2C IIC UART TTL ISP Serial Adapter Module EPP/MEM Converter For Serial Brush Debugging RS232 RS485
Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Parallel Port Board, High Durable USB To UART I2C SPI Interface 3.3V/5V Output Voltage Parallel Ports Converter Module For Industrial - Walmart.com
USB-SPI Adapters
CSR USB-SPI Programmer – Oz Robotics
USB to SPI/I2C/IIC/SPI/UART/TTL/ISP Master HID CH341A Converter Adapter GPIO DIY RC Electronic Toy Robot Development Board - AliExpress
Yocto-SPI - USB to SPI adapter (TTL 3.3V or 5V), driver-free
USB to SPI breakout board using MCP2210 (Part 1) - YouTube
USB To UART/I2C/SPI/JTAG Converter, Supports Multiple Interfaces, Compatible with 3.3V and 5V, Multiple Protection Circuits, Multiple Systems Support, Aluminum Alloy Case, Wall-mount & Rail-mount Support