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AD7879 : Should the ADC mode be set to "Do not convert" while changing GPIO value

Question asked by karthikeyan on May 16, 2012
Latest reply on May 18, 2012 by karthikeyan


    We are trying to write a baremetal code for ad7879 touchscreen controller. In the datasheet (page no 26), its been said that


To change any parameter after conversion has begun, the part

must first be put into ADC Mode 00. Make the changes, and

then reprogram Control Register 1, ensuring that it is always

the last register programmed before conversions begin.



But while trying to change the value of the GPIO (Control Register 2 bits: 10 to 13), should this be followed and the ADC mode has to be changed?