I'm developing the audio device,for which the long delay(more than 8s at the sample rate of 96K),with ADAU1452.Obviously,this kind of delay samples is not allowed to storage to the on-chip RAM of the 1452.
And it seems the off-chip RAM with SPI interface is supported in 1452.But I can hardly find any document about how to realize it.
Can anyone offer me any suggestion about it?And it will be very much appreciated.
Will you be selfbooting the part from SPI EEPROM or do you have a system controller?
There is a delay cell you can drag into your schematic.
The "MAX" input box sets the maximum delay. I am not sure what the units are at this point. It was due to be changed. It might be in bytes instead of words. With a word being one sample period. I asked this question recently to the programming team and have not heard back.
The "CUR" setting is the runtime setting for the delay. This will be from one sample period to the max.
Click on the "Z-n" box to open up the setup for the SPI RAM. You have to make sure it does not conflict with the bootup EEPROM address.
Hi Dave T,
I would like to know what 1452 supports off-chip SPI RAM.Please recommend one or two ICs to me.
We have used the 23LC1024 for SPI RAM. We did not do a large test of many different vendor's products. But, we did test this Microchip product.
My application used a system controller for ADAU1452.
Can I use the external SPI RAM?