logic high == +5v ?

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,

I bought a Pololo A4988 stepper driver to configute microstepping I need to bring some pins to logig high or logic low (which they are in by default).
I can simply connect them to +5V? Or is there a difference between bringing them to high via a digital PIN and connecdting them to +5V rail?

Thanks
Robert

2

Logic High = 1 = +5V.

3

Thanks. Just wanted to make sure I don't fry the driver.

Robert

4

Nearly all modern stuff is CMOS, and CMOS logic levels go right to the rails. (This wasn't true
for older TTL logic families which used pull-up resistors for logic high)

5

CMOS uses transistors to pull the outputs low or to drive them high also.

See figures 2 & 3 on pages 1 & 2.