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ADAU1452 SPI burst mode writing, wait time between successive word

Question asked by Paramecium on Oct 16, 2015
Latest reply on Oct 22, 2015 by Paramecium


The ADAU1452 SPI burst mode writing, should we add wait time between successive word transfers ?


In the initialization sequence, when the host writes data via SPI in the burst mode, the ADAU1453 does not work normally.

If I set the SCLK frequency to 50KHz or less, it works normally.

On the other hand, when I wrote the program and register data from the PC on the Sigma Studio, I probed the SPI signals and observed the waveform.

Then there were small wait time ( the SCLK stopped a while ) between successive word transfer, I found.


It seems that we can transfer data without wait as the following Figure 36

I cannot find any specification about it in the data sheet.

But are there any limitations or specifications when we use the SPI burst writing ?


ADAU145x date sheet ( rev. C )

Page 14 SPI Interface—Slave

Page 39 Figure 36. SPI Slave Write Clocking (Burst Write Mode, N Bytes)