We are building ultra low power devices and would like to isolate one 1-Wire device from the microcontroller. If enable pin is low (set through GPIO), there is current flow from VCCA to the microcontroller. According to datasheet Page no 5, Pull up Resistor for enable pin is 250Kohm. current flowing into microcontroller = (3.3/250 x 1000) = 13.2uA which is very high in our case. This is solved by making GPIO pin of microcontroller as input.
Adding pull up resistor on SDAA and SCLA has increased the current consumption to 650uA while enable pin is low. What could be the reason for this behaviour?