In addition, I already saw this topic here: viewtopic.php?t=38350
So to be more precise, is there a way to boot on HSPI without using efuse which would modify permanently the board ?

Hi all, I developped a custom board based on NINA-W102 which embeds an ESP32-D0WQ6-V3. This board is connected through HSPI to an external Flash chip 16MB W25Q128 from Winbond. When I flash a test code to the 2MB internal Flash, W25Q128 is well recognized with ID: EF 40 18, but SPI frequency needs t...