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About QSPI opcode (WREN ) for Instruction Set

user6876

Hello.

I have question for QSPI OPCODE.

According to "nRF52840_PS_V1.5", WREN optional at "the custom Instruction".

- using function: nrf_drv_qspi_cinstr_xfer

Is it the same for "the Instruction set "?

Is it possible to set the signal not to be output? (i.e. WREN, RDSR)

- using function: nrfx_qspi_write (i.e. PP, PP4O)

Thank you.

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    Hi

    I'm sorry about the late reply, but we're currently working through our backlog after the holiday season. Happy new year!

    Indeed, a custom instruction is just that, custom. So you're able to modify most of it to do what you'd like, but doing so you should follow the OP code specified in the QSPI device you're using to make it do what you'd like. The custom instruction will be output from the nRF52840 to the external device, but the OP code and instruction you send can "tell" the external device to send data back if that's what you want.

    Please note that the nrfx_qspi_write() function is not a custom instruction, but a fixed function in our QSPI driver.

    Best regards,

    Simon

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  • 0

    Hi

    I'm sorry about the late reply, but we're currently working through our backlog after the holiday season. Happy new year!

    Indeed, a custom instruction is just that, custom. So you're able to modify most of it to do what you'd like, but doing so you should follow the OP code specified in the QSPI device you're using to make it do what you'd like. The custom instruction will be output from the nRF52840 to the external device, but the OP code and instruction you send can "tell" the external device to send data back if that's what you want.

    Please note that the nrfx_qspi_write() function is not a custom instruction, but a fixed function in our QSPI driver.

    Best regards,

    Simon

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