AM2634: gpmc

gyeongju kwon

Part Number: AM2634

I use gpmc

I connected fpga to am2634.
I use gpmc.
How can I change the location of 0000h and 001Fh on a data line in a timing chart?

over 2 years ago

0 Ming Wei over 2 years ago

TI__Guru 56205 points

Hi Kwon,

To adjust the CS position, you can play with the CSWROFFTIME and CSONTIME in CS_CS_GPMC_CONFIG2.

To adjust the WE position, you can play with the WEOFFTIME and WEONTIME in CS_CS_GPMC_CONFIG4

To adjust the width of the CS/WE, you can play with the WRCYCLETIME of CS_CS_GPMC_CONFIG5

Best regards,

Ming

0 gyeongju kwon over 2 years ago in reply to Ming Wei

Prodigy 130 points

Where can I find CS_CS_GPMC_CONFIG2?

0 gyeongju kwon over 2 years ago in reply to gyeongju kwon

Prodigy 130 points

Is this the right data sheet?

0 Ming Wei over 2 years ago in reply to gyeongju kwon

TI__Guru 56205 points

Hi Kwon,

Yes! Those are the right TRM register addendum (rev D): https://www.ti.com/lit/pdf/spruj42.

Best regards,

Ming

0 gyeongju kwon over 2 years ago in reply to Ming Wei

Prodigy 130 points

If you do as told, only the clock count changes.
The position of the values in data 0000h and data 0018h remains unchanged.
Attached is my source code.

I want to change the location of data 0000h and 0018h.

Aren't there any alternatives?

0 gyeongju kwon over 2 years ago in reply to gyeongju kwon

Prodigy 130 points

Can I get the data [15...0] value to come out late or fast?

0 Ming Wei over 2 years ago in reply to gyeongju kwon

TI__Guru 56205 points

Hi Kwon,

Where is the code where you change the CS_CS_GPMC_CONFIG2, CS_CS_GPMC_CONFIG4 and CS_CS_GPMC_CONFIG5?

I only see the code write the data to PSRAM.

Best regards,

Ming

0 gyeongju kwon over 2 years ago in reply to Ming Wei

Prodigy 130 points

+1 gyeongju kwon over 2 years ago in reply to gyeongju kwon

Prodigy 130 points

Can't I use this register?

0 Ming Wei over 2 years ago in reply to gyeongju kwon

TI__Guru 56205 points

Hi Kwon,

Did you try different values for CSWROFFTIME and CSONTIME in CS_CS_GPMC_CONFIG2; WEOFFTIME and WEONTIME in CS_CS_GPMC_CONFIG4 and WRCYCLETIME of CS_CS_GPMC_CONFIG5?

Yes. You can use CS_CS_GPMC_CONFIG1, but what fields you wanted to change?

Best regards,

Ming

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AM2634: gpmc