mc3phacvp Freescale Semiconductor, Inc, mc3phacvp Datasheet - Page 10

• Manufacturer Part Number: mc3phacvp
• Description: Mc3phac Motor Control Unit
• Manufacturer: Freescale Semiconductor, Inc

Features
In standalone mode, the base frequency and PWM polarity are specified at the same time during
initialization by connecting either pin 25, 26, 27, or 28 exclusively to the PWMPOL_BASEFREQ input.
During initialization, pins 25, 26, 27, and 28 are cycled one at a time to determine which one has been
connected to the PWMPOL_BASEFREQ input.
Table 3
made. Refer to the standalone mode schematic,
connected at any one time.
10
shows the selected PWM polarity and base frequency as a function of which pin connection is
Table 3. PWM Polarity and Base Frequency Specification in Standalone Mode
PWMPOL_BASEFREQ Pin
It is not necessary to break this connection once the initialization phase has
been completed. The MC3PHAC will function properly while this
connection is in place.
MOTOR PHASE CURRENT WAVEFORMS
Pin Connected to
DC_BUS (JP4)
MUX_IN (JP1)
UNCOMPENSATED
SPEED (JP2)
ACCEL (JP3)
COMPENSATED
MC3PHAC Monolithic Intelligent Motor Controller, Rev. 2
Figure 4. Dynamic Bus Ripple Cancellation
NOTE
Figure
REMOVES 60 Hz HUM
AND DECREASES I
MC3PHAC
Logic high = on
Logic high = on
PWM Polarity
Logic low = on
Logic low = on
8. Only one of these jumpers (JP1–JP4) can be
PWM1
PWM2
CORRECTED PWMs
2
R LOSSES
PWM3
PWM4
Base Frequency
PWM5
PWM6
Freescale Semiconductor
50 Hz
50 Hz
60 Hz
60 Hz