USB2LIN

# USB to LIN bus converter

This converter is used for flashing electric motorcycle ECU firmware. It is theoretically universal and can be used for testing Suzuki. The original programming line uses a 4-layer board. For convenience, the module also uses a 4-layer board.

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## 1. Description

### 1. The shell

adopts a universal USB to serial port shell. Since the C port is relatively large, you need to bring your own file to modify it (the shell is very brittle, a utility knife is not recommended)

![Shell.jpg ]
*Interface after file modification:*

![Modified rear end of shell.jpg]
### 2. The wire

needs to be DIYed by yourself, one end is type-C, and the other is DJ7069Y-0.6-21 male connector.

*Correspondence:*

| type-C | DJ7069Y-0.6-21 male |
| :------: | :----------------: |
| VBUS | VBAT |
| GND | GND |
| CC1 | LIN |
| CC2 | LIN |

### 3. Signal flow

USB -> FT232(UART) -> TJA1021T(LIN) -> type-C

### 4. Note!

The original burning software can only recognize the FTDI serial port chip, and forced modification can only recognize it but not burn it (anyone who can directly change the host computer is free to do so).

The board and openings are a bit small, and the shell does not fit very well, so you need to use a round file. Modification (PCB file is too lazy to change)

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## 2. Photos

### 1. Photos of this project

! [Chip side with case installed.jpg]
! [Back side with case installed.jpg]
![Chip side without case. jpg]
![Backside without case.jpg]
![Overall.jpg]
### 2. Original wire photo

![FT232.jpg]
![TJA1021T.jpg]