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MC3PHACVP Datasheet(PDF) 8 Page - Motorola, Inc |
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MC3PHACVP Datasheet(HTML) 8 Page - Motorola, Inc |
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8 / 44 page  MC3PHAC/D 8 3-Phase AC Motor Controller MOTOROLA 15 FAULTIN A logic high on this input will immediately disable the PWM outputs. A retry timeout interval will be initiated once this pin returns to a logic low state. 16 PWMFREQ_RxD In standalone mode, this pin is an output that drives low to indicate the parameter mux input pin is reading an analog voltage to specify the desired PWM frequency. In PC master software mode, this pin is an input which receives UART serial data. 17 RETRY_TxD In standalone mode, this pin is an output that drives low to indicate the parameter mux input pin is reading an analog voltage to specify the time to wait after a fault before re-enabling the PWM outputs. In PC master software mode, this pin is an output that transmits UART serial data. 18 RBRAKE Output which is driven to a logic high whenever the voltage on the dc bus input pin exceeds a preset level, indicating a high bus voltage. This signal is intended to connect a resistor across the dc bus capacitor to prevent excess capacitor voltage. 19 DT_FAULTOUT In standalone mode, this pin is an output which drives low to indicate the parameter mux input pin is reading an analog voltage to specify the dead-time between the on states of the top and bottom PWM signals for a given motor phase. In PC master software mode, this pin is an output which goes low whenever a fault condition occurs. 20 VBOOST_MODE At startup, this input is sampled to determine whether to enter standalone mode (logic high) or PC master software mode (logic low). In standalone mode, this pin is also used as an output that drives low to indicate the parameter mux input pin is reading an analog voltage to specify the amount of voltage boost to apply to the motor. 21 VDD +5-volt digital power supply to the MC3PHAC 22 VSS Digital power supply ground return for the MC3PHAC 23 FWD Input which is sampled to determine whether the motor should rotate in the forward or reverse direction 24 START Input which is sampled to determine whether the motor should be running. 25 MUX_IN In standalone mode, during initialization this pin is an output that is used to determine PWM polarity and base frequency. Otherwise, it is an analog input used to read several voltage levels that specify MC3PHAC operating parameters. Table 2. MC3PHAC Pin Descriptions (Sheet 2 of 3) Pin Number Pin Name Pin Function Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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