M16C/62 Group DATASHEET

Timers’ functions for three-phase motor controlMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERA carrier wave of sawtooth waveformCarrier waveSignal waveTimer B2Trigger signal fortimer Ai start(timer B2 overflowsignal)Interrupt occurres.Rewriting the value of timer A4.Rewriting three-phaseoutput buffer registerInterrupt occurres.Rewriting the value of timer A4.Data transfer is made from the threephasebuffer register to the threephaseshift register in step with thetiming of the timer B overflow.Timer A4 outputm n pThe three-phaseshift register shiftsin synchronizationwith the fallingedge of timer A4.U phaseoutput signalU phaseoutput signalU phaseU phaseDead timeNote: Set to sawtooth modulation mode and to three-phase mode 0.Figure 1.18.9. Timing chart of operation (4)111