2.3 3-Phase Motor Connector, J24
Power outputs to the motor are located on connector J24. Phase outputs are labeled 0, 1, and 2. A permanent magnet
synchronous (PMSM) or a brushless DC (BLDC) motor phase windings can be connected into these connectors.
Table 1. 3-phase motor connector
Connector
Signal name
Description
J24 pin 1
Phase 0
Supplies power to motor phase A
J24 pin 2
Phase 2
Supplies power to motor phase C
J24 pin 3
Phase 1
Supplies power to motor phase B
2.4 Hall Sensor Interface, J11
In Hall sensor based BLDC applications, the Hall sensor inputs are used to determine the actual motor rotor sector. The MCU
is capable of providing a regulated 5 V supply to an external Hall sensor by the EVDD pin.
The signals from this connector can be routed to the timer related inputs on the MCU. The following table shows the pinout
description of the Hall Sensor connector interface.
Table 2. Hall Sensor connector interface
Interface pin
Signal name
MCU signal
Description
Direction
1
EVDD
EVDD (PP0 through
J14)
5 V supply to Hall
sensor
Power Output
2
GND
—
Ground reference
Power Reference
3
HALL_A/PH_A
IOC1 (PT1 through J15)
Hall sensor A
Digital Input
4
HALL_B/PH_B
IOC2 (PT2 through J16)
Hall sensor B
Digital Input
5
HALL_C/Index
IOC3 (PT3)
Hall sensor C
Digital Input
6
—
—
(Not connected)
—
2.5 Resolver Interface, J62
In applications using a resolver sensor, the position of the rotor is encoded into sine and cosine signals indicating the shaft
angle. A reference signal is generated out of an MCU timer pin. The sine and cosine signals can be routed to two different
ADC channels, depending on the appropriate jumper configuration.
The resolver driver circuit shapes a rectangular reference signal from the timer port PT0 output to a sinusoidal waveform. It
consists of an integrator that transforms the rectangular signal into a triangle. The higher harmonic components are filtered
out by the following stage. The output of the filter stage drives the resolver reference winding (RES_GENP/RES_GENM).
The resolver sine and cosine signals are input into a conditioning circuitry that adjusts voltage levels down to the range
acceptable to the on-chip ADC module.
Interface Description
S12ZVM12EVB Evaluation Board User Guide, Rev. 2, 03/2016
Freescale Semiconductor, Inc.
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