Other Parts Discussed in Thread: MSP430FR2355
I need some clarification on TIDA -010031 schematic for following question:
1) In schematic U_BEMF,V_BEMF,W_BEMF,BEMF_C is connected to ADC(A7,A6,A5,A4) pin no 31,32,33,34 respectively but resistors divide network one end should be connect to Gnd for measurement , but in schematic it is not there .
what is the reason behind this and how the U_BEMF,V_EMF,W_BEMF measured ?
2) Again in schematic W_BEMF,U_BEMF,BEMF_C is connected to pin 41,10,37 of controller . Pin 41 and 10 is either act as GPIO or Comparator input. And pin 37 either act as GPIO or Opamp 3 output as per controller MSP430FR2355 datasheet
what is the reason and logic behind this?
3) How U_ctrl,V_Ctrl and W_Ctrl (Pin 45, 36, 35 respectively) is sensed by controller without any GND reference and why we need this ?
Please find the Schematic with highlighted
Thanks & Regards
Dhiren SahooSchematic queries for highlighted point.pdf