WM1302 USB version question

Products & Technology LoRa
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Hello

Can SX1302 be accessed directly via SPI pins on mini-PCIe connector in USB version ?

I’m planning to use the WM1302 module for a custom MeshCore repeater
project (not standard LoRaWAN). I would like to buy the USB version
but also need direct SPI access to the SX1302 chip.

Looking at the block diagram in the documentation, it seems like the
SPI pins (SPI_MOSI, SPI_MISO, SPI_SCK, SX1302_CS) are routed to the
mini-PCIe golden finger connector on both SPI and USB versions.

My questions:

  1. On the USB version, are the SPI pins physically connected to the
    mini-PCIe golden finger, or are they only connected internally
    to the STM32L412?
  2. If SPI pins are accessible on the golden finger, would there be
    a bus contention issue between the STM32 and an external SPI master?
  3. Is it possible to put the STM32 into a high-impedance state or
    flash a custom firmware via SWD/DFU to disable its SPI activity?

Thank you