The RT1052 uses both QSPI FLash and QSPI PSRAM

[Maxwell_Liu]

We want to use RT1052 to drive an 800*600 RGB interface display, but due to the lack of OCRAM space, we need external SDRAM, but the market of 16Bit SDRAM is seriously out of stock, we want to use SQPI PSRAM as video memory. The RT1052 FLXSPI supports port A and port B. I am wondering if QSPI Flash(W25Q64) can be mounted on port A and QSPI PSRAM(APS6404L) can be mounted on port B.

[Maxwell_Liu]

Thank you very much

[jeremyzhou]

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) I am wondering if QSPI Flash(W25Q64) can be mounted on port A and QSPI PSRAM(APS6404L) can be mounted on port B.
-- Yes, you can, however, it's impossible for FlexSPI to access the QSPI and PSRAM simultaneously, in other words, the PSRAM can't replace the SDRAM in the RT1052's design.
Have a great day,
TIC

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[Maxwell_Liu]

1)Is it possible to load all the APP code in QSPI FLAH into OCRAM during startup so that PSRAM can be used as video memory or even as program RAM

2)Is it possible to transfer all APP code in QSPI FLAH to PSRAM during startup, run code in XIP mode in PSRAM while PSRAM is used as video memory

[jeremyzhou]

Hi,
Thanks for your reply.
1) Is it possible to load all the APP code in QSPI FLAH into OCRAM during startup so that PSRAM can be used as video memory or even as program RAM
-- Yes, it's possible.
2) Is it possible to transfer all APP code in QSPI FLAH to PSRAM during startup, run code in XIP mode in PSRAM while PSRAM is used as video memory
-- No, I'm afraid not.
Have a great day,
TIC

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[Maxwell_Liu]

I'm still a little confused about the second question.What is the problem with this solution not working, is it not able to automatically move APP code to PSRAM at startup, or is it not possible to use QSPI RAM as both XIP mode and video memory?

1)If I write a BOOT program, first start the BOOT program normally from QSPI Flash, and load the BOOT to ITCM to run, the function of BOOT is to copy all APP data in QSPI Flash to PSRAM. Can I then run the program directly on PSRAM in XIP mode.

2)If the above method works,can PSRAM be divided into two areas, one as program code area, the other as video memory and program running memory

[jeremyzhou · Accepted solution]

Hi,
Thanks for your reply.
1) )If the above method works,can PSRAM be divided into two areas, one as program code area, the other as video memory and program running memory?
-- Yes, it's possible.
Have a great day,
TIC

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