Semiconductor integrated circuit device

摘要

A motor rotation speed determining circuit is provided, and a processing of generating motor driving waveform is switched in accordance with the motor rotation speed. A resolver signal is converted to a digital value by an R/D converter, and inputted to a resolver value correction computing circuit via an R/D conversion interface. A current value of a motor M is converted to a digital value by an A/D converter. The resolver value correction computing circuit computes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The motor control computing circuit computes a current instruction value from a motor current value subjected to digital conversion by the A/D converter and a motor current instruction value etc., and a motor waveform output circuit generates a motor driving waveform from the current instruction value and outputs the same to a power module PM.

主权项

1. A data processing device for controlling a rotation speed of a motor provided in a vehicle, comprising:
a central processing unit (CPU) capable of performing a software processing; a motor speed determining portion capable of detecting whether a rotation speed of the motor is lower or higher than a predetermined value; a computing portion including a correction circuit, and correcting a resolver value which is obtained by counting up a resolver signal outputted from a resolver attached to the motor, wherein the resolver value is corrected by the software processing of the CPU when the rotation speed of the motor is lower than the predetermined value, and wherein the resolver value is corrected by the correction circuit when the rotation speed of the motor is higher than the predetermined value; and a waveform generation portion including a waveform generation circuit, wherein a motor driving waveform is generated by the software processing of the CPU when the rotation speed of the motor is lower than the predetermined value, wherein the motor drive waveform is generated by the waveform generating circuit when the rotation speed of the motor is higher than the predetermined value, and wherein the computing portion includes:
a data storage portion storing first error correction data of a difference between the resolver value including error in one cycle of the resolver and a reference resolver value not including error, anda computing circuit of resolver value correction performing a correction processing of the resolver value including error based on the first error correction data.