| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of an inverter control signal generating circuit that a certain period is required until IGBT trigger OFF is detected, an output is switched even when a register value is updated by switching a PWM output to a port I/O output during the IGBT trigger OFF condition, and therefore as many small pulses are generated for the delay to generate disturbance in a control signal. SOLUTION: When it is detected that the IGBT trigger signal is turned ON by updating a first set register 1b and a buffer register 1r in the IGBT trigger signal OFF state, a multiplexer 1d can be switched in synchronization with the IGBT trigger and delay of switching can be reduced by updating the content of a second set register 1e to the content of the buffer register 1r. |
