Additional info:
The ADC uses internal Vref of 0.6 volts to check the battery power supply. Before sleep the ADC is switched off.
Also UART is switched off, along with Tmr1 and some ports setting.
The only one that stays as input, is the Portb.7 the Rx pin but even if it is grounded the current stays at 1.8mA.
WDT is disabled.
BOR is disabled.
/MCLR is set as internal and as the data sheet states, there is an internal pull up.
Ioannis
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