User manual

dsPICDEM™ MCSM Development Board User’s Guide

The connector is configured in such a way so that all eight motor wires can be

connected in all possible configurations. Considering an eight-wire motor in a bipolar

configuration (series- or half-winding), two wires will be left floating. The NC pins are

available to accommodate the two floating wires.

The DC bus connection is placed between wires of two different phases to

accommodate the center tap of a winding in unipolar configurations. Refer to Table 3

for details on how to connect the motor wires to J8 for all possible configurations.

3.3.7 Test Points

Table 3-6 lists the test points that can be used to check various signals.

TABLE 3-6: TEST POINTS

Test Points Description

POT POT signal

15V 15V MOSFET driver supply

3.3V 3.3V digital supply

DD Analog supply (3.3V)

AVSS Analog ground

IMOTOR1 Motor current phase 1

IMOTOR2 Motor current phase 2

REF Zero current reference voltage

DC_REF DC_BUS voltage input to ADC

IREF Reference current for Fault detection

PWM1H1 PWM output for wire 1 top switch

PWM1L1 PWM output for wire 1 bottom switch

PWM1H2 PWM output for wire 2 bottom switch

PWM1L2 PWM output for wire 2 top switch

PWM1H3 PWM output for wire 3 top switch

PWM1L3 PWM output for wire 3 bottom switch

PWM2H1 PWM output for wire 4 bottom switch

PWM2L1 PWM output for wire 4 top switch