Abstract: In a semiconductor device for generating complementary PWM signals for, for example, controlling an inverter, a dead time is flexibly added by using a simple architecture. A dead time addition unit adds time elapsing until a value of a timer reaches a set value of a register as a first dead time at a rise of a first PWM signal. On the other hand, time elapsing until the value of the timer reaches a set value of another register is added as a second dead time at a rise of a second PWM signal.

Abstract: In a semiconductor device for generating complementary PWM signals for, for example, controlling an inverter, a dead time is flexibly added by using a simple architecture. A dead time addition unit adds time elapsing until a value of a timer reaches a set value of a register as a first dead time at a rise of a first PWM signal. On the other hand, time elapsing until the value of the timer reaches a set value of another register is added as a second dead time at a rise of a second PWM signal.

Abstract: In a semiconductor device for generating complementary PWM signals for, for example, controlling an inverter, a dead time is flexibly added by using a simple architecture. A dead time addition unit adds time elapsing until a value of a timer reaches a set value of a register as a first dead time at a rise of a first PWM signal. On the other hand, time elapsing until the value of the timer reaches a set value of another register is added as a second dead time at a rise of a second PWM signal.

Abstract: A microcomputer for performing an inverter control includes three AD converters provided therein. The first and second AD converters are used for a motor control, and each receive a motor position detection signal. The third AD converter is used for a power supply control, and receives an analog signal representing the state of the power supply. Therefore, a motor control and a power supply control are performed by using separate AD converters, whereby it is possible to optimally perform each control without an AD conversion having to wait for another AD conversion to be completed.

Abstract: In a semiconductor device for inverter controlling that includes an AD converter and controls a pulse width of a multi-phase PWM signal on the basis of a digital value obtained by the AD converter, a timer starts counting time in response to a signal supplied from a counter used for generating a PWM signal when the counter has counted a given count value. A timer period of the timer is calculated on the basis of a duty set value stored in a duty set resistor included in a PWM signal generation circuit, and the timer period is stored in a timer period set resistor. The timer generates an AD conversion start factor signal when the timer has counted the timer period stored in the timer period set resistor, and the AD conversion start factor signal is output to the corresponding AD converter so as to start AD conversion. Accordingly, the AD conversion can be definitely started at a time of a predetermined specific ON/OFF combination of the PWM signal.

Abstract: A microcomputer for performing an inverter control includes three AD converters provided therein. The first and second AD converters are used for a motor control, and each receive a motor position detection signal. The third AD converter is used for a power supply control, and receives an analog signal representing the state of the power supply. Therefore, a motor control and a power supply control are performed by using separate AD converters, whereby it is possible to optimally perform each control without an AD conversion having to wait for another AD conversion to be completed.

Abstract: In a semiconductor device for inverter controlling that includes an AD converter and controls a pulse width of a multi-phase PWM signal on the basis of a digital value obtained by the AD converter, a timer starts counting time in response to a signal supplied from a counter used for generating a PWM signal when the counter has counted a given count value. A timer period of the timer is calculated on the basis of a duty set value stored in a duty set resistor included in a PWM signal generation circuit, and the timer period is stored in a timer period set resistor. The timer generates an AD conversion start factor signal when the timer has counted the timer period stored in the timer period set resistor, and the AD conversion start factor signal is output to the corresponding AD converter so as to start AD conversion. Accordingly, the AD conversion can be definitely started at a time of a predetermined specific ON/OFF combination of the PWM signal.

Abstract: A microcomputer for performing an inverter control includes three AD converters provided therein. The first and second AD converters are used for a motor control, and each receive a motor position detection signal. The third AD converter is used for a power supply control, and receives an analog signal representing the state of the power supply. Therefore, a motor control and a power supply control are performed by using separate AD converters, whereby it is possible to optimally perform each control without an AD conversion having to wait for another AD conversion to be completed.

Abstract: A microcomputer for performing an inverter control includes three AD converters provided therein. The first and second AD converters are used for a motor control, and each receive a motor position detection signal. The third AD converter is used for a power supply control, and receives an analog signal representing the state of the power supply. Therefore, a motor control and a power supply control are performed by using separate AD converters, whereby it is possible to optimally perform each control without an AD conversion having to wait for another AD conversion to be completed.