i.MX RT Crossover MCUsのトピックRe: How does the FlexSPI memory map relate to ARM Platform memory map?

How does the FlexSPI memory map relate to ARM Platform memory map?

imxrtuser — Tue, 03 Mar 2020 08:59:40 GMT

Hello,

the FlexSPI memory map is defined as

Is it correct that flash A1 will start at ARM Platform Memory Map 0x6000_0000?

If I develop an application with two flash devices, each 8 MByte, a second flash A2 will start at FlexSPI address 0x0080_0000 which will be ARM memory address 0x6080_0000.

If I now decide to remove flash A2 and use flash B1 instead, the FlexSPI address for flash B1 will be 0x0080_0000 and ARM memory address 0x6080_0000.

In this case the used address range will be the same as for flash A2, is this correct?

Kind regards,

Stefan

Re: How does the FlexSPI memory map relate to ARM Platform memory map?

kerryzhou — Thu, 05 Mar 2020 10:46:51 GMT

Hi Stefan Mitterhauser ,

Please tell me which RT chip you are using？ Please tell me your RT chip partnumber, then I can help you to check more details, thanks.

Have a great day,
Kerry

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Re: How does the FlexSPI memory map relate to ARM Platform memory map?

imxrtuser — Thu, 05 Mar 2020 13:40:54 GMT

Hello Kerry,

I am using RT1020-EVK with PIMXRT1021DAG5A and additional ISSI QSPI flash memories.

Kind regards,

Stefan

Re: How does the FlexSPI memory map relate to ARM Platform memory map?

kerryzhou — Fri, 06 Mar 2020 10:38:10 GMT

Hi Stefan Mitterhauser,

Thanks so much for your updated information.

Now answer your original questions:

1. Is it correct that flash A1 will start at ARM Platform Memory Map 0x6000_0000?

Answer: the base address is 0x60000000

2. If I now decide to remove flash A2 and use flash B1 instead, the FlexSPI address for flash B1 will be 0x0080_0000 and ARM memory address 0x6080_0000.

In this case the used address range will be the same as for flash A2, is this correct?

Answer: Yes, FA2_SIZE is 0 is ou don't use the A2.

Wish it helps you!

If you still have questions about it, please kindly let me know.

Have a great day,
Kerry

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Re: How does the FlexSPI memory map relate to ARM Platform memory map?

imxrtuser — Fri, 06 Mar 2020 10:55:55 GMT

Thank you Kerry!

Kind regards,

Stefan