Re: AD7714 help


Prakruthi wrote:

If you use a MCU with a SPI peripheral, it could be set to the wrong
SPI mode. Hook up a digital scope or logic analyzer to the SCL,CS#,
DIN,DOUT pins, and compare the diagrams with the data***, make sure
the data gets transferred on the right clock edge. Then try write/read
back again, and look at the interface to see if the correct value is
passed, and then see if this same value makes it all the way to the
application.

Hi,

I did compare the signals with the clock and found out that the data is
not getting transferred on the right clock edge. How do I set the clock
sync right. How do I determine what the right clock frequency for the SPI transfer
would be.

It depends on the SPI master you're using... if it's halfway decent, it
has configuration bits for SPI clock polarity, or SPI mode. Check the
data***. This is something else than the SPI clock frequency, which
may be OK. If you want more help, you'll need to post what device
you're using to talk to the AD7714.

.