Re: AD7714 help


Prakruthi wrote:

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.

I m using the ATMega8 to communicate with the AD7714. So it has amazing
options for configuring the SPI clock frequency. The ATMega8 runs at a
frequency of 14.567MHz. And im using a SCLK frequency of fclkin/128 to
drive the slave(AD7714), with a CPOL=1 and CHPA=1. I have no idea what
the problem could be , cause I have tried all the different SCLK
frequencies that are available.

The clock frequency is within limits, and CPOL=1, CHPA=1 is also
correct.

What makes you say the 'data is not getting transferred on the right
clock edge' ?

.