Boliu intelligent bl604_module minimum system/adapter board

1. Function description

1) Boliu Intelligent bl604_module stamp hole module pins are all lead out. (The packages of the two stamp holes of bl604_module and bl706_module have been uploaded to Lichuang eda)

2) Type-c interface for power supply and download, using CH340N as the download circuit, button boot and reset, and when using Bouffalo Lab Dev Cube to download the program, 2M Uart Rate is optional.

2. Project Description

1) Using type-c power supply, hand soldering is a bit difficult, you can directly change it or directly fly the power supply + other USB to TTL downloader.

2) CH340N may have certain requirements for welding. If the download reports 0003 or other various errors, you can first try to see if it can be downloaded with other downloaders. If so, you can consider re-soldering or reducing the Uart Rate (9600).

3) There are too many power supply filter capacitors, and some of them can be left unsoldered.

4) The resistors (R3, R2) related to the boot and reset buttons can be short-circuited directly, and the related capacitors (C8, C7) do not need to be soldered.

3. Download instructions (see attached document for details)

Press the boot button, then press the reset button, release the reset button first, and then release the boot button.

Note:

The main purpose of drawing this board is for transfer. The download circuit can be used, but there is no guarantee that it will work. It is recommended to prepare a CH340 Tuhao Gold.

Pin description:

GPIO8——Boot Pin

GPIO7——RXD

GPIO16——TXD

Precautions:

1) VDDIO has been connected to 3.3. It seems that the 602 stamp hole board does not lead to VDDIO separately. This needs attention.

2) This is my first time to draw type-c and download the circuit. I hope you guys can give me more advice.

3) The module board is given out by the competition, and I don’t know where I can buy it.