P1022 boot with 32 bit address space at the LB

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P1022 boot with 32 bit address space at the LB

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Contributor I

Hi,

Could I boot the P1022  with 32 bit address space at the LB with 16 bit nor flash ?

The 32 bit address is mandatory.

If boot from 16 bit nor flash not working, do I need 32 bit Nor flash for boot?

Regards

Zeev Gerber

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NXP TechSupport
NXP TechSupport

P1022 supports booting from 16-bit NOR Flash ROM (24-bit and 28-bit addressing).

After initial booting the eLBC data bus width could be reconfigured by setting the PMUXCR[eLBC_DIU]=00.

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Contributor I

Hi,

What about working with 32 bit addressing (GPCM 32 bit) with a30 connect to the lsb address of the flash.

do I need 2 units of 16 bit nor Flash?

Pls. advise

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NXP TechSupport
NXP TechSupport

> do I need 2 units of 16 bit nor Flash?

If the system is intended to work with 32-bit NOR Flash, then it is reasonable to boot from 32-bit NOR Flash.

In this case the answer to the question is "yes".

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Contributor I

Hi,

 my question is:

If the boot room location is 1111 (GPCM 32 bit) do I need 2 units of 16 bit nor Flash or that I have more options?

I want to work with 32 bit address in the eLBC, without any reconfiguration.

Pls. advise

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NXP TechSupport
NXP TechSupport

> If the boot room location is 1111 (GPCM 32 bit) do I need 2 units of 16 bit nor Flash

Yes.

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Contributor I

Hi,

So, if I use 2 units of 16 bits for 32 bit data bus, I need to connect A29 Addr bit from CPU to the Flash lsb Addr?

Pls. approve

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NXP TechSupport
NXP TechSupport

Correct.

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