Super mini UART tool

Introduction: USB to UART, a compact and powerful serial port tool, supports voltage isolation and electrostatic protection.
1. Product introduction:

This project is a very compact serial port tool USB-TTL, which supports high-performance serial port debugging and provides a power supply. , signal isolation, ESD electrostatic protection, etc., aiming to provide safe and reliable protection for serial port debugging of high-power, high-voltage and other equipment in embedded development;


2. Application scenarios:

1. Used for serial port debugging in embedded device development, USB- TTL

2. Provides power and signal isolation protection for high voltage, high power, motor debugging, etc. during serial port debugging;


3. Product overview:

This design is a very compact serial port tool USB-TTL, with an overall size of 3cm*1cm. The design uses Silabs CP2102 serial port conversion chip, TI's digital isolation chip ISO7721DR, can support signal isolation below DC 1500V, and also uses the USBLC6-2SC6 electrostatic protection chip to achieve ESD protection;


4. Product parameters:

1. Type converter: USB ->UART

2. UART IC: CP2102

3. Isolation voltage: 1000 V

4. Electrostatic protection voltage: 30KV

5. Logic level: 2.5, 3.3 and 5V

6. Temperature range: -40...+85°С

7. Data interface: TYPE C



5. Instructions for use:

1. The CP2102 driver is packaged in the attachment. You can install the driver file according to your own computer parameters. Connect the serial port tool to the computer using a Type c data cable. The corresponding information can be found in the "Computer Management" as shown in the figure below. "Find the serial port tool in ";



2. Open any serial port tool software, you can find the tool at the port location for connection. The maximum baud rate of the serial port tool supports 460800;


3. As shown in the figure below, the ISO7221 isolation chip has four For the positions of the resistors (R13, R14, R15, R16), if you do not need to install an ISO7221 isolation chip, you can directly paste them with 0Ω or directly short-circuit them;



6. Remarks:

1. This module is pure hardware and does not require code, that is Just plug it in and use it.

2. The total cost of this module is less than 15 yuan (PCB proofing is free)

3. The attachment comes with a "driver" file and a "chip data manual", as well as an "assembly diagram" to facilitate welding.



7. Demonstration video:

Video It briefly introduces the component structure of the design and demonstrates the effect of using the serial port tool... If you have any questions when verifying, please leave a message in the comment area. Due to limited personal abilities , the hardware, schematic diagram, etc.


may be a little sloppy.


PCB is released for free, I hope all friends will like and follow, thank you!!!