Is it possbile for SEMC connecting SDRAM and DBI device at the same time?

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Is it possbile for SEMC connecting SDRAM and DBI device at the same time?

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SSFG1992
Contributor I

Hi,

I connect SDRAM and DBI port for AD7606B with the SEMC. I can read ADC data  or wirte ADC regesiter s by an fixed address. The SDRAM also can write/read successfully.

Now I use DMA0 to transfer data from AD7606B to SDRAM periodically. The frequency is equal to ADC sampling rate. I guess the transfer include the following operations: reading AD by DBI mode then wirte SDRAM by SDRAM mode. However, my application may access the SDRAM  at sometime.

Conld it occur that software execute a reading data in SDRAM while the dma0 is reading AD or writing SDRAM? Is it conflicting?

 

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Alexis_A
NXP TechSupport
NXP TechSupport

Hello @SSFG1992,

This will depend if the access are done through the AXI or the IP bus:

Alexis_A_0-1625004510188.png

As it mentions in the section 25.5.4 in the RM, the AXI bus accesses has a queue managed by priority meanwhile If another IP command triggered when the previous IP command not finished yet, IP command error interrupt is generated.

Best Regards,

Alexis Andalon

 

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