[AM572x] Confirm the calculation parameters on GPMC.

Kaka

Hi TI Experts,

Please let me confirm the following question.

[Question]

Would you please provide the meaning of "GPMC_FCLK" ,"TimeParaGranularity", "ADVExtraDelay","CSExtraDelay" and "OEExtra" on Table 7-29 in datasheet?

If you have any questions, please let me know.

Best regards.

Kaka

over 9 years ago

0 Brad Griffis over 9 years ago

TI__Guru*** 125430 points

Those items are explained in the TRM. Please read the GPMC chapter and I expect it will be clear.

0 Kaka over 9 years ago in reply to Brad Griffis

Guru 24520 points

Hi Brad,

Thank you for your information.
Would you please teach me the frequency of GPMC_FCLK(L3MAIN1_L3_GICLK) in default?

Can we think the value as 133MHz? TRM is decribed about "The GPMC clock is 133 MHz." on page 7404.

Best regards.
Kaka

0 Brad Griffis over 9 years ago in reply to Kaka

TI__Guru*** 125430 points

Kaka said:
Can we think the value as 133MHz? TRM is decribed about "The GPMC clock is 133 MHz." on page 7404.

If you're booting from NOR flash then yes, the ROM configures GPMC_FCLK to 133 MHz as stated in Section 33.3.7.3 "XIP Memory".

0 Kaka over 9 years ago in reply to Brad Griffis

Guru 24520 points

Hi Brad,

Thank you for your response.
Is it a potential to change the this value from ROM configures?
I could confirm that the DPLL_ABE is set as 400MHz on EVM after boot up.
But I could not confirm the GPMC clock.

Best regards.
Kaka

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[AM572x] Confirm the calculation parameters on GPMC.