Um...

And obviously you should also drive the TX pin low if it isn't already.

~ Bob Ammerman
RAm Systems

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
> Of Bob Ammerman
> Sent: Wednesday, September 02, 2015 11:16 AM
> To: 'Microcontroller discussion list - Public.' <piclist@mit.edu>
> Subject: RE: [PIC] Current Consumption in Sleep
>=20
> > Thanks.  It looks like my first step should probably to reconfigure
> > the
> project
> > so I'm using the PIC's EUSART rather than bit-banging it.
> >
> > John Hansen
>=20
> You shouldn't have to do that.
>=20
> Just do the following to power down:
>=20
> 1: Power down the MAX232
> 2: Set the RX pin to an output and drive it low.
>=20
> The only issue I can see is that the caps on the MAX232 might feed back
thru
> the MAX232 and induce a voltage on the RX line coming from the MAX232 to
> the RX pin. This could result in unacceptable current on the RX pin of th=
e
PIC
> when you drive it low. I would just put a 3.3K resistor between the PIC's
RX
> pin and the MAX232 to avoid this issue (if it is indeed an issue).
>=20
> ~ Bob Ammerman
> RAm Systems
>=20
>=20
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