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M16C/5L Group, M16C/56 Group
Table 17.1
Three-Phase Motor Control Timer Function Specifications
Item
Operation modes
Three-phase PWM
waveform output pins
Forced cutoff input
Used timers
Output waveform
Carrier wave cycle
Three-phase PWM output
width
Dead time (width)
Active level
Simultaneous conduction
prevention function
Interrupt frequency
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
•
Triangular wave modulation three-phase mode 0
Three-phase PWM waveform of triangular wave modulation is output.
Output data is updated every half cycle of the carrier wave, and an output
waveform is generated.
•
Triangular wave modulation three-phase mode 1
Three-phase PWM waveform of triangular wave modulation is output.
Output data is updated every cycle of the carrier wave, and an output
waveform is generated.
•
Sawtooth wave modulation mode
Three-phase PWM waveform of sawtooth wave modulation is output.
6 (U, U , V, V , W, W )
Input a low-level signal to the SD pin
Timers A4, A1, A2 (used in one-shot timer mode)
Timer A4: U-/ U -phase waveform control
Timer A1: V-/ V -phase waveform control
Timer A2: W-/ W -phase waveform control
Timer B2 (used in timer mode)
Carrier wave cycle control
Dead time timer (three 8-bit timers and shared reload register)
Dead time control
Triangular wave modulation, sawtooth wave modulation
•
All high or low outputs for one cycle supported
•
Output logic of high- and low-side turn-on signals can be set separately.
Triangular wave modulation :
Sawtooth wave modulation :
m: Setting value of the TB2 register, 0000h to FFFFh
fi: Count source frequency (f1TIMAB, f2TIMAB, f8TIMAB, f32TIMAB,
f64TIMAB, fOCO-F, fOCO-S, fC32)
Triangular wave modulation :
Sawtooth wave modulation :
n: Setting value of registers TA4, TA1, and TA2 (of registers TA4, TA41, TA1,
TA11, TA2, and TA21 when setting the INV11 bit to 1), 0001h to FFFFh
fi: Count source frequency (f1TIMAB, f2TIMAB, f8TIMAB, f32TIMAB,
f64TIMAB, fOCO-F, fOCO-S, fC32)
p
or no dead time
------ -
fi
p: Setting value of the DTT register, 01h to FFh
fi: Count source frequency (f1TIMAB, f2TIMAB, f1TIMAB divided by 2,
f2TIMAB divided by 2)
Selectable either active high or active low
Simultaneous conduction prevention
Simultaneous conduction detection
A timer B2 interrupt is generated every carrier wave cycle to every 15 carrier
wave cycles.
17. Three-Phase Motor Control Timer Function
Specification
(
) 2
×
m
+
1
---------------------------- -
fi
m
1
+
------------- -
fi
×
n 2
------------
fi
n
------ -
fi
Page 305 of 803
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