eem2am
Banned
Hello
Do you think that the NJM2673 bipolar, switch-mode stepper driver IC has clamp diodes on its signal input pins?
(pins: I01, I11, I02, I12, PHASE1, PHASE2)
NJM2673 DATASHEET (njr.com):-
2shared - download NJM2673.pdf
Or find datasheet here:
**broken link removed**
(i.e. protection diodes with anode to pin, and cathode to VCC?)
..by signal pins, I mean that the current magnitude and direction inputs (I01, I11, I02, I12, PHASE1, PHASE2)
Its just that we I have connected the microcontroller outputs directly to the signal pins of NJM2673 with no series resistors.
-Also, there is a switch so that we can switch off the VCC supply to NJM2673 when we are not driving the stepper motors (this saves some power)
-in this state, VCC = 0V, and for a short time, the microcontroller will be putting logic highs into the current magnitude pins (I01, I11, I02, I12)………
……..if such clamp diodes exist, then the microcontroller pins will end up basically driving into short circuits.
Do you think that the NJM2673 bipolar, switch-mode stepper driver IC has clamp diodes on its signal input pins?
(pins: I01, I11, I02, I12, PHASE1, PHASE2)
NJM2673 DATASHEET (njr.com):-
2shared - download NJM2673.pdf
Or find datasheet here:
**broken link removed**
(i.e. protection diodes with anode to pin, and cathode to VCC?)
..by signal pins, I mean that the current magnitude and direction inputs (I01, I11, I02, I12, PHASE1, PHASE2)
Its just that we I have connected the microcontroller outputs directly to the signal pins of NJM2673 with no series resistors.
-Also, there is a switch so that we can switch off the VCC supply to NJM2673 when we are not driving the stepper motors (this saves some power)
-in this state, VCC = 0V, and for a short time, the microcontroller will be putting logic highs into the current magnitude pins (I01, I11, I02, I12)………
……..if such clamp diodes exist, then the microcontroller pins will end up basically driving into short circuits.