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

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

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mitterha
Senior Contributor I

Hello,

the FlexSPI memory map is defined as

pastedImage_1.png

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

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kerryzhou
NXP TechSupport
NXP TechSupport

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

pastedImage_1.png

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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kerryzhou
NXP TechSupport
NXP TechSupport

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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mitterha
Senior Contributor I

Hello Kerry,

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

Kind regards,

Stefan

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kerryzhou
NXP TechSupport
NXP TechSupport

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

pastedImage_1.png

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

 

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

 

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
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mitterha
Senior Contributor I

Thank you Kerry!

Kind regards,

Stefan

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