Tool/software:
Hi,
We just got the second layout of the board which having 3 MCT8316A IC's on board
The 1st board was for evaluation only, the 2nd round is the 1st operational layout candidate
There is minor circuit change regarding the MCT8316A schematic between the 1st to the 2nd board
Mainly:
1. Removing the external buck option peripherical components and change the FB_BK schematic accordantly
2. Removing speed/ DIR wiring to the MCU (important to mention that fully success driving all 3 motors with I2C thru I2C MUX implemented in the 1st board)
3. The pin28 (Speed/WAKE) tied all 3 MCT8316A together to one MCU pin.
4. DIR pin is floating (but we tied it to GND, don't help)
5. DRVOFF pin is floating (but we tied it to GND, don't help)
In the new board, no any I2C communication, we can't observe even ACK from the MCT8316
The motor try/ short start to rotate and stop and vise versa
The fault indication is active
The DACOUT2/SOX (pin 36) 3V output
can you please advise
BR
Shachar