Features
1. Supports USB to 2-ch UART, or USB to 1-ch UART + 1-ch I2C + 1-ch SPI, or USB to 1-ch UART + 1-ch JTAG
2. Supports 2-ch high-speed UART interfaces, up to 9Mbps baud rate, with CTS and RTS hardware automatic flow control
3. Supports 1-ch I2C interface, for easy operating EEPROM through the host computer or programming I2C devices such as OLED and sensor
4. Supports 1-ch SPI interface, with 2x chip select signal pins, capable of controlling 2-ch SPI slave devices at different times
5. Supports 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)
6. Onboard 3.3V and 5V level conversion circuit for switching the operating level of the communication interface, better compatibility
7.Onboard resettable fuse and ESD protection circuit, provides over-current/over-voltage proof, safe and stable communication

Specifications
Host interface:USB
Power Supply:USB port, 5V
Operating level:3.3V/5V (select via onboard switch)

1) USB
Connector:USB-B
Interface protection:Resettable fuse, ESD protection

2) 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

3) 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)

4) 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)

5) JTAG
Channel: 1 (the red DIP switch needs to be set to M3 mode)
Connector:12PIN IDC connector (the last 8 pins are JTAG)

Package Content
USB TO UART/I2C/SPI/JTAG x1
USB type A to type B cable ~1.2m x1
12PIN cable ~20cm x1
6PIN cable ~20cm (2PCS) x1