Input handling for media processing devices

A media processing device comprising:

• a hopper for supporting a plurality of media units, the hopper including a biasing assembly for biasing the media units toward an outlet of the hopper;
• an input roller at a slot inlet configured to accept a single media unit into the hopper for placement adjacent to the outlet;
• a pick roller at the outlet for dispensing one of the media units from the hopper to a media processing path;
• a motor having an output shaft;
• a primary drivetrain segment connecting the output shaft with the pick roller;
• an auxiliary output selector connected to the primary drivetrain segment and switchable between a first output configuration and a second output configuration;
• a first auxiliary drivetrain segment connecting the auxiliary output selector with the input roller;
• a second auxiliary drivetrain segment connecting the auxiliary output selector with a release member configured to disengage the biasing assembly from the plurality of media units;
• and
• a selector input movable between (i) a first position for switching the auxiliary output selector to the first output configuration to couple the primary drivetrain segment with the first auxiliary drivetrain segment;
• and (ii) a second position for switching the auxiliary output selector to the second output configuration to couple the primary drivetrain segment with the second auxiliary drivetrain segment.