Hi Graham, On Mon, Aug 15, 2016 at 11:28:39AM -0500, Graham Haddock wrote: > You are pulling a line to ground, which is a 2.7K resistor to internal > +3.3V. > > So, if your GPIO line can pull 1.2 mA to ground and keep it a logic 'low' > then the GPIO line should work directly.
Ok, thanks! > Make sure your ground systems are tied together. > Make sure you understand what the system will do if you have power on the > radio, and no power on the Linux board. (It might turn the radio on.) Right, since the gpio controller is embedded in the SoC, I'm thinking the best answer is an external circuit. Even though the gpio could handle it on it's own. That way, behavior doesn't depend on the power state of the Linux box. thx, Jason. _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz To opt out of the Reflector: http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
