usb_msc example on a custom board

Hello, i would like to test usb_msc example on a custom board, and i have few questions:

  - will this QSPI flash chip work with nRF52840 QSPI interface, and is it sufficient as a QSPI block device: Microchip SST26VF064B

  - where in the code (i mean usb_msc example) can i specify SOC pin numbers which i want to use for QSPI operation?

  - are there any constraints on whic general purpose SOC pins can i designate as QSPI interface?

Thanks,

W

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