MCUXpresso SDKのトピックFlexSPI Parallel Mode 2 QSPI flashes

FlexSPI Parallel Mode 2 QSPI flashes

Dave_Cogley — Wed, 24 Aug 2022 16:53:33 GMT

Hello,

I have a question regarding using FlexSPI in parallel mode. I have 2 identical 8MB flashes (Winbond W25Q64JV) hooked up using QSPI on Port A1 and Port B1. The question is, does this make both flashes addressable? Meaning Port A1 is address range 6000_0000 ~ 6080_0000 and Port B1 is 6080_0000 ~ 6100_0000? When do I set bit 31 on register IPCR1? Does it need to be set before every every transfer, or is setup beforehand? In parallel mode, are both chip selects used?

It is important to note, Port A1 is running XIP and Port B1 is used as a data flash.

Dave

Re: FlexSPI Parallel Mode 2 QSPI flashes

jeremyzhou — Thu, 25 Aug 2022 01:51:25 GMT

Hi @Dave_Cogley ,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
Before answering your question, I think I'd like to know more information, so whether you can share the schematic of the FlexSPI connection.
Have a great day,
TIC

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Re: FlexSPI Parallel Mode 2 QSPI flashes

Dave_Cogley — Fri, 26 Aug 2022 16:16:40 GMT

Sorry for the delay. As you can see U12 is the XIP flash and U17 is the DATA flash.

Re: FlexSPI Parallel Mode 2 QSPI flashes

jeremyzhou — Mon, 29 Aug 2022 05:48:08 GMT

Hi,
Thanks for your reply.
According to your schematic and purpose, it should use the individual mode device connection to connect the two QSPI flashes (W25Q64JV), the FlexSPI1 Parallel Mode Device Connection is not suitable.

Have a great day,
TIC

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