I am working on dc motor speed control project in which I am using 12 v dc motor , l293d motor driver ic and pic16f877A for controlling the motor.
Pic16f877A is sending pwm signal from its RC2 pin(pin17) which i have connected to pin2 of motor driver ic L293d.
But i noticed that even when my enable pin is not connected to source(vdd or gnd) L293d is still working and motor shaft spins.
How can motor driver ic L293d works when my enable pin is not connected.
But when i connect it to ground it doesn't work . So is enable pin of L293d by default high??