I have successfully been able to communicate with the AD7177 ADC. The data sheet specifies that the ADC is in continuous conversion mode by default. When I read the default mode register, it shows the device is in standby mode. If I try and write to it to go into single conversion mode and immediately read it, it shows the device is still in standby mode. I am able to place the device in power down mode. How can I change the mode to single conversion mode?