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DRV8860: Daisy chain limitations and timing

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Part Number:DRV8860

I am looking to daisy chain some DRV8860 chips. I have a few questions...

1. Is there a maximum number you can daisy chain?

2. For the timing constraints in section 7.6, the latch to clk time (th) is 1 uS. Is that the delay I need to give it before the clk signal is generated? 

3. For the CLK high and low time, it says a minimum of 2.5 uS. Does that mean I can go no slower than 400 Khz on the clk?

4. Are there any timing constraints when daisy chaining?


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