Part Number: DRV8824
My customer is requiring that inputting STEP signal without excitation of motor.
("without excitation of motor" means that H-bridge is disable condition)
Because they would like to set not home position when restarting from sleep.
Is it possible?
Understand. It is possible. The STEP pin will advance the indexer when the device is awake and outputs are disabled. But, we need to confirm this. Do you have an EVM to check it?
Motor Drive Solutions
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In reply to Wang5577:
Thank you for your help.
> It is possible. The STEP pin will advance the indexer when the device is awake and outputs are disabled.
We have the EVM.
Could you tell me how to control?
In reply to Kuramochi Tadahiko:
1. Set nSLEEP high
2. Keep nRESET low
3. Add STEP signal.
Thank you for your reply.
Did you check above on the EVM?
The data sheet says that "The STEP input is ignored while nRESET is active".
The 8.3.6 section's statement and nRESET pin function description are conflict in the datasheet. The nRESET pin function description ( nRESET pin: Active-low reset input initializes the indexer logic and disables the H- bridge outputs. Internal pulldown.) should be true.
I don't have a DRV8824EVM on hand. You can verify it with your EVM.
Could you revise the datasheet in the near future?
It is required when we submit delivery specification to my customer.
I have added this issue to our datasheet to do list. The datasheet will be updated when we do the DRV8824 datasheet update next time. But, I can not promise the time frame.
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