I am trying to reduce the sleep current in an XBee S1.
At the moment I can only get it down to 40uA
The only pins connected are:
1 Vcc (3V)
9 Sleep (output of a 74HC4538D)
13 On/Sleep to power an opamp, sensor and Vref when awake
14 Vref powered by pin 13.
19 and 20 as AtoD in.
Should the unused DIO be set to disabled?
Should the PR pullups be set to 0?