Hi,
I have a problem with my configuration to fit all the required peripherals.
I plan to use external Quad SPI NOR Flash with no Strobe. (as the EVK).
I need to use : CCM.CLKO1 [J4] and CCM.CLKO2 [J1].
I need one FlexSPI (for ext Flash) and one uSDHC for SdCard.
The 2 clocks outputs prevent me from using uSDHC1.
Then, I have to use uSDHC2 for the SdCard that has the CMD signal on [M4].
The [M4] pin is shared with FLEXSPI.A_DQS.
What's the best way to use SdCard and boot on FlexSPI ?
Can I boot easily on FLEXSPI2.A ? or should I use FlexSPI1.A with internal loopback Strobe ?
Thanks in advance,
Hi @jfz_arturia ,
Thank you for your interest in the NXP MIMXRT product, I would like to provide service for you.
Question: Can I boot easily on FLEXSPI2.A ?
Answer: No, You can't.
In IMXRT1040RM reference manual, You can see that NOR Flash can only be boot on FlexSPI1
Question: or should I use FlexSPI1.A with internal loopback Strobe ?
Answer: You can use this mode, but the max Frequency of operation is limited to 60MHz if you use this mode .
https://www.nxp.com/webapp/Download?colCode=IMXRT1040RM
https://www.nxp.com/docs/en/data-sheet/IMXRT1040CEC.pdf
Wish it helps you.
If you still have question about it, please kindly let me know.
Wish you a nice day!
Best Regards
MayLiu