Bootloader Download with ST-LINK
The bootloader can be downloaded using ST-LINK or JLINK.
Let’s try downloading using STLINK.
1. Connect SWD Interface with STLINK-V2
J5 → SWD Interface
| PIN | Name | Function | Description | |
| 1 | GND | Connect to ground | Power Ground | |
| 2 | DIO | Data input/output | IO voltage: 0~3.3Vn | |
| 3 | CLK | Reference clock signal | IO voltage: 0~3.3V | |
| 4 | 3V3 | Reference power supply output | Ref. voltage: 1.8~3.6V, Typ.: 3.3V |
2. Connect Device to STLINK-V2

3. Erase all the Flash

4. Open FW(bootloader) to download

5. Executes Download
Take care the flash start address to download.

5. Confirm the Download Result

