USB to UART/I2C/SPI/JTAG Converter

This USB-to UART/I2C/SPI/JTAG converter gives flexible configurations including dual-channel UART, or a combination of UART, I2C, and SPI, as well as a configuration that supports UART with JTAG functions. It has high-speed data transmission with two UART interfaces supporting up to 9Mbps baud rate, complete with CTS and RTS for reliable hardware automatic flow control.

If your project involves memory devices and sensors, the converter provides a single-channel I2C interface, which is perfect for operating EEPROMs or programming I2C devices like OLED displays and various sensors. The SPI interface has two chip-select signal pins that allow control over two SPI slave devices independently.

Additionally, the JTAG interface is used for debugging and testing with OpenOCD, although you should perform their evaluations and tests due to the limited testing of chips and software functions. To provide wide compatibility with various systems, the converter includes an onboard 3.3V and 5V level conversion circuit, making it easy to switch the operating level of the communication interfaces.

Features

• USB to 2-channel UART, or USB to 1-ch UART + 1-ch I2C + 1-ch SPI, or USB to 1-ch UART + 1-ch JTAG
• 2-channel high-speed UART interfaces, up to 9Mbps baud rate, with CTS and RTS hardware automatic flow control
• 1-channel I2C interface, for easy operating EEPROM through the host computer or programming I2C devices such as OLED and sensor
• 1-channel SPI interface, with 2x chip select signal pins, capable of controlling 2-ch SPI slave devices at different times
• 1-ch JTAG interface, can be used with OpenOCD for debugging and testing (Due to the limited testing of chips and software functions, users need to evaluate and test this function on their own)
• Onboard 3.3V and 5V level conversion circuit for switching the operating level of the communication interface, better compatibility
• Onboard resettable fuse and ESD protection circuit, provides over-current/over-voltage proof, safe and stable communication
• Aluminium alloy case with oxidation dull-polish surface, CNC process opening, solid and durable, well-crafted
• High-quality USB-B and DC connectors, smooth plug & pull, durable and reliable, with anti-reverse protection

Specifications

Host Interface	USB
Power Supply	USB port, 5V
Operating Level	3.3V/5V (select via onboard switch)
USB	Connector	USB-B
	Interface protection	Resettable fuse, ESD protection
UART	Channel	2 (the red DIP switch needs to be set to M0 mode)
	Connector	6PIN IDC connector
	Baud rate	1200bps～9 Mbps
	Hardware flow control	CTS and RTS
I2C	Channel	1 (the red DIP switch needs to be set to M1/M2 mode)
	Connector	12PIN IDC connector (the first 4 pins are I2C)
SPI	Channel	1 (the red DIP switch needs to be set to M1/M2 mode)
	Connector	12PIN IDC connector (the last 8 pins are SPI)
JTAG	Channel	1 (the red DIP switch needs to be set to M3 mode)
	Connector	12PIN IDC connector (the last 8 pins are JTAG)
Dimensions	86.0 x 48.0 x 27.6mm

Resources

• Product Wiki

Pinout

PWR	Power indicator, lights up while the USB is connected and voltage is detected
RXD1	UART1 receiving indicator lights up when the device port sends data back
TXD1	UART1 sending indicator lights up when the USB port sends data
RXD0	UART0 receiving indicator lights up when the device port sends data back
TXD0	UART0 sending indicator lights up when the USB port sends data

Package Contents

1. USB TO UART/I2C/SPI/JTAG
2. USB type A to type B cable -1.2m
3. 12-pin cable -20cm
4. 2x 6-pin cable -20cm