Tool/software:
I have found some issues of some pins of microcontroller side while designing the whole schematics for our project. So my question is what is the role of MSP_TOFF_PD,MSP_M1_PD etc that are connected with microcontroller(with 330Kohm) as there is already connected pins with 0 ohm resistor with driver circuit? I have marked that on the following image.
Hi Niraj,
Thanks for your post.
So my question is what is the role of MSP_TOFF_PD,MSP_M1_PD etc that are connected with microcontroller(with 330Kohm) as there is already connected pins with 0 ohm resistor with driver
These pins have multi-mode. Notice those two resistors are connected to two separate GPIO pins. The pins can go to Hi-Z mode. So the 0 Ω pin can go to Hi-Z and the 330 kΩ connected GPIO can be 0 V to support 330 kΩ to GND. See info from datasheet for the DRV8434.
The title of your post mentions DRV8434SEVM. The DRV8434S is an SPI control device. It's connections are different. What you showed is for HW control stepper driver device such as the DRV8434. Thank you.
Regards, Murugavel
