Hello out there,
I'm building a unit which uses a micro-controller to take acceleration data, and then transmit the data back to a ground station. I'm using aerocomm 4790-1000 trancievers. I'm having a problem with interfacing the transciever with the micro-ontroller. I have tx, rx, and the command/data pin hooked up via diodes to regulate voltage from 5 to 3.3. I'm using and seperate power source to run the transciever. When I plug in the power source I get three volts on the rx,tx and command/data lines. As far as I am to understand this should not happen unless directect by the micro-controller to do so, or at the very least I'm pretty sure I'm not suppose to have voltage coming out on the rx line.
Any help would be greatly appreciated.
Thanks
D.
I'm building a unit which uses a micro-controller to take acceleration data, and then transmit the data back to a ground station. I'm using aerocomm 4790-1000 trancievers. I'm having a problem with interfacing the transciever with the micro-ontroller. I have tx, rx, and the command/data pin hooked up via diodes to regulate voltage from 5 to 3.3. I'm using and seperate power source to run the transciever. When I plug in the power source I get three volts on the rx,tx and command/data lines. As far as I am to understand this should not happen unless directect by the micro-controller to do so, or at the very least I'm pretty sure I'm not suppose to have voltage coming out on the rx line.
Any help would be greatly appreciated.
Thanks
D.