i.MX ProcessorsのトピックRe: Question about qspi-nor-xxx-config file

Question about qspi-nor-xxx-config file

ko-hey — Wed, 28 Nov 2018 01:26:55 GMT

Hi all,

I need to edit following files because my customer use N25Q032A of micron.

・ qspi-nor-macronix-mx25l51245g-config

・ qspi-nor-micron-n25q256a-config

・ qspi-nor-spansion-s25fl128s-config

I have a question about parameter of " ddr_mode_enable=1".

Accessing the NOR flash in DTR / DDR mode when "ddr_mode_enable = 1" is set in the QuadSPI setting file and only ADDR or READ is used without using ADDR_DDR or READ_DDR with lut [n] Is it possible?

Ko-hey

Re: Question about qspi-nor-xxx-config file

igorpadykov — Thu, 29 Nov 2018 03:19:06 GMT

Hi Ko-hey

>Accessing the NOR flash in DTR / DDR mode when "ddr_mode_enable = 1"
>is set in the QuadSPI setting file and only ADDR or READ is used without using
>ADDR_DDR or READ_DDR with lut [n] Is it possible?

sorry this is not possible.

Best regards
igor
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Re: Question about qspi-nor-xxx-config file

ko-hey — Thu, 29 Nov 2018 05:25:44 GMT

Hi igorpadykov

Which mode is used to access the NOR flash when "ddr_mode_enable = 1" is set in the QuadSPI setting file and only ADDR or READ is used with lut [n], SDR mode or DDR mode ?

Ko-hey

Re: Question about qspi-nor-xxx-config file

igorpadykov — Thu, 29 Nov 2018 06:36:50 GMT

Hi Ko-hey

when "ddr_mode_enable = 1" it is necessary to use "ddr" mode commands only:

ADDR_DDR or READ_DDR. ADDR or READ can not be used in "ddr" mode.

Best regards
igor

Re: Question about qspi-nor-xxx-config file

ko-hey — Thu, 29 Nov 2018 08:29:04 GMT

Hi igorpadykov

When using the ADDR or READ command, it is executed in SDR mode regardless of the setting value of ddr_mode_enable.

Am I correct ?

Ko-hey

Re: Question about qspi-nor-xxx-config file

igorpadykov — Thu, 29 Nov 2018 08:38:09 GMT

not.

Setting value of ddr_mode_enable requires usage only ddr commands:

ADDR_DDR or READ_DDR.

Best regards
igor

Re: Question about qspi-nor-xxx-config file

ko-hey — Fri, 30 Nov 2018 06:16:35 GMT

Hi igorpadykov

Thank you for your support.

I posted another question (https://community.nxp.com/thread/490304) related to this thread.

I hope you will follow it.

Ko-hey