DRV8847: Contain any logic that would preclude pin swapping

Al B

Part Number: DRV8847

For my customer...

I’m working on a project with a new motor mechanism and to make board layout easier. I’m wondering if the DRV8847 contains any logic that would preclude pin swapping. Of course, the Sense Inputs will follow the respective A or B outputs.

over 4 years ago

0 Wang5577 over 4 years ago

TI__Guru 56650 points

Hello, Al,

I don't fully understand "preclude pin swapping". Why do you have this requirement.

Please check which operation mode do you want first? 4-Pin Interface; 2-Pin Interface; paralleling mode or Independent Bridge Interface.

And then, check the Table 3 to 6 logic true tables to see if it can meet your requirement.

0 Al B over 4 years ago in reply to Wang5577

TI__Intellectual 2990 points

Here's what he originally sent for his desire. Does this help answer the question?

Here’s what I have in mind;

Existing Signals

Signal In	Input	Pin	Pin	Output	Signal Out	Motor
STEP_A_P	IN1	14	16	OUT1	A_OUT_P	A+
STEP_A_N	IN2	13	2	OUT2	A_OUT_N	A-
STEP_B_N	IN3	7	5	OUT3	B_OUT_N	B+
STEP_B_P	IN4	8	3	OUT4	B_OUT_P	B-

Proposed Signals

Signal In	Input	Pin	Pin	Output	Signal Out	Motor
STEP_B_N	IN1	14	16	OUT1	B_OUT_N	A+
STEP_B_P	IN2	13	2	OUT2	B_OUT_P	A-
STEP_A_P	IN3	7	5	OUT3	A_OUT_P	B+
STEP_A_N	IN4	8	3	OUT4	A_OUT_N	B-

Of course, the Sense Inputs will follow the respective A or B outputs.

0 Wang5577 over 4 years ago in reply to Al B

TI__Guru 56650 points

Al,

Thank you for your input. I don't think DRV8847 INx pin can be muxed out to different output channels. I would think this should be done on the host controller.

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DRV8847: Contain any logic that would preclude pin swapping