Hi,
I have a prototype board with 2 drv8825 channels. One works fine, the other has 3.3 Vref out but the .01uf charge pump osc cap (pins 1 - 2) is setting at ground (not oscillating). I checked the Vf from the pins to ground with a diode tester (power off of course) and have a value of ~ 1.5v on pin1 of the functioning chip, but open on the other. Just want to verify that the chip is bad before I try to replace it.
Thanks,
Steve