software serial + drive stepper motor?

[perigalacticon]

Hi,

I am looking to make a device that will communicate through a HC-05 BT board (so software serial?) and drive a stepper motor (arduino stepper library?).  The stepper motor driver needs 4 inputs to drive the motor.  Can the DigiSpark be set up to control everything here?

I am not certain or clear on the IO pins and their capabilities / functions, is there a good resource for this?

Thanks