On L293E there is something called "Sensing Resistors" I can't understand.
I downloaded the datasheet, both L293B and L293E share the same datasheet but while B type is DIP16, E one is DIP20, and on each side of the chip there are two pins for "sensing resistors". I didn't find enough info on the datasheet about the function of them (there is a schematic-application for stepping motor there, but I am to use the chip with spinning dc motors).
I first guessed that I can leave them unconnected and life would go on, but I was wrong: the motors won't move! Next, considering that application note in the datasheet, I just connected each 'sensing-resistor' pin to the ground and life started to go on, but so fast!
While I have pwm from Arduino normally working on my B type chip, after grounding those sensing-resistor pins, the motor spins the fastest way, as if I applied analogWrite(pwmPin, 254) on the 'enable pin' of the chip. Changing the value of pwm applying on the enable pin issues no changes!
I googled for L293E but can't come up with useful info, could anyone please give me some idea how to make the life "controllable" with pwm please?