I am using an ADS1100 from TI to convert voltage from a pressure sensor.
At the request of the microcontrolleur (18F4520), the ADS send the OK and accept the control byte.
During reading, the ADS send the OK and then the 3 bytes as expected (2 bytes for the low and high data's word) and the control byte. But all of them are 0xFF (as read from the microcontroller or with a logical analyser).