DRV8703-Q1: two DRV8703-Q1 on same SPI bus?

Klemen Zivkovic

Part Number: DRV8703-Q1

Hi,

I am trying to use 2 gate drivers, bot on same MOSI, MISO and SCLK lines from uC.

It seems MISO is somehow pulled low when 2 chips are soldered. If only one is soldered - MISO could be pulled up and communications works.

With two of them as said none of them works - seems because MISO is low. Why?

schematic attached.

0 Klemen Zivkovic over 7 years ago

I soldered second chip back on and change code in a way that I put both CS (chip select) lines high on start inside firmware code.

I can successfully read LOCK bits from main control register 0x02h on both chips now.

0 Rick Duncan over 7 years ago in reply to Klemen Zivkovic

Hi Zhivko,

Thank you for following up, and letting us know how you fixed your problem.

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