DRV8873SEVM: DRV8873S SPI COMMENTS

MURALITHARAN K

Part Number: DRV8873SEVM

Hello,

This is Muralitharan. I am using Motor driver DRV8873s. I configured this driver with Nuvoton M4 controller with parrel SPI communication to control two motors. If I send 1st set of comments, driver will not respond. After 2,3 comments, Driver will respond except 1st comments.

I wish to make that driver to respond all comments even 1st comment also.

Why its not responding to 1st few comments? Could anyone help me to resolve this problem?

10 months ago

0 Ryan Kehr 10 months ago

TI__Guru 54675 points

Hello,

Can you share schematic and scope capture of SPI commands so timing can be closely checked? Since you mention parallel mode, each device has a separate chip select line?

Are you having issues with both devices on board or just one?

Regards,

Ryan

0 MURALITHARAN K 9 months ago in reply to Ryan Kehr

Prodigy 10 points

I attached Schematic and Scope Capture of SPI Commands for your reference. Here I am using separate Chip Select line and also facing same issues both device on board.https://drive.google.com/drive/folders/1Gf24j8lKZWQGgj2AT5ddiLTOb13hU7gq?usp=sharing

0 Ryan Kehr 9 months ago in reply to MURALITHARAN K

TI__Guru 54675 points

Hello,

Thank you! I review tomorrow as today is a US holiday.

Regards,

Ryan

+1 Ryan Kehr 9 months ago in reply to Ryan Kehr

TI__Guru 54675 points

Posting scope image above. Can you tell me what channel is which signal? Also, SPI is 4 signals...would like to see all of them. Finally, can you zoom out to a single write transaction so I can check the timing? Right now I am puzzled why the top trace is only going to 1V.

What is the supply voltage on the MCU?

Regards,

Ryan

0 MURALITHARAN K 9 months ago in reply to Ryan Kehr

Prodigy 10 points

resolved the problem

Motor drivers

Motor drivers forum

DRV8873SEVM: DRV8873S SPI COMMENTS