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M16C/62P Group (M16C/62P, M16C/62PT)
16. Three-Phase Motor Control Timer Function
Note
16. Three-Phase Motor Control Timer Function is described in the M16C/62P (128 pin version
and 100 pin version) and M16C/62PT (100 pin version) only as an example.
The M16C/62P (80 pin version) and M16C/62PT (80 pin version) do not use this function.
Timers A1, A2, A4 and B2 can be used to output three-phase motor drive waveforms. Table 16.1 lists the
specifications of the three-phase motor control timer function. Figure 16.1 shows the block diagram for three-
phase motor control timer function. Also, the related registers are shown on Figure 16.2 to Figure 16.7.
Table 16.1 Three-phase Motor Control Timer Functions Specifications
Item
Three-Phase Waveform Output Pin
(1)
Forced Cutoff Input
Used Timers
Output Waveform
Carrier Wave Cycle
Three-Phase PWM Output Width
Dead Time
Active Level
Positive and Negative-Phase Concurrent
Active Disable Function
Interrupt Frequency
NOTES:
1. Forced cutoff with NMI input is effective when the IVPCR1 bit in the TB2SC register is set to "1" (three-phase
output forcible cutoff by NMI input enabled). If an "L" signal is applied to the NMI pin when the IVPCR1 bit is "1,"
the related pins go to a high-impedance state regardless of which functions of those pins are being used.
Related pins
R
e
. v
2
3 .
0
S
e
p
0
, 1
2
0
0
4
R
E
J
0
9
B
0
1
8
5
0 -
2
3
0
Z
Six pins (U, U, V, V, W, W)
Input "L" to NMI pin
Timer A4, A1, A2 (used in the one-shot timer mode)
Timer B2 (used in the timer mode)
Dead timer timer (3 eight-bit timer and shared reload register)
Triangular wave modulation, Sawtooth wave modification
Triangular wave modulation: count source x (m+1) x 2
Sawtooth wave modulation: count source x (m+1)
Triangular wave modulation: count source x n x 2
Sawtooth wave modulation: count source x n
Count source: f1, f2, f8, f32, fC32
Count source x p, or no dead time
Count source: f1, f2, f1 divided by 2, f2 divided by 2
Enable to select "H" or "L"
Positive and negative-phases concurrent active disable function
Positive and negative-phases concurrent active detect function
For Timer B2 interrupt, select a carrier wave cycle-to-cycle
basis through 15 times carrier wave cycle-to-cycle basis
_______
_______
P7_2/CLK2/TA1OUT/V, P7_3/CTS2/RTS2/TA1IN/V, P7_4/TA2OUT/W, P7_5/TA2IN/W,
P8_0/TA4OUT/U, P8_1/TA4IN/U
page 144
f o
3
6
4
16. Three-Phase Motor Control Timer Function
Specification
___
___
___
_______
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Timer A4: U- and U-phase waveform control
___
Timer A1: V- and V-phase waveform control
___
Timer A2: W- and W-phase waveform control
Carrier wave cycle control
Dead time control
Enable to output "H" or "L" for one cycle
Enable to set positive-phase level and negative-phase level
respectively
m: Setting value of TB2 register, 0 to 65535
Count source: f1, f2, f8, f32, fC32
n: Setting value of TA4, TA1 and TA2 register (of TA4,
TA41, TA1, TA11, TA2 and TA21 registers when setting
the INV11 bit to "1"), 1 to 65535
p: Setting value of DTT register, 1 to 255
_________ _________
___
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