R01UH0136EJ0210 Rev.2.10
Page 346 of 800
Jul 31, 2012
M16C/64A Group
19. Three-Phase Motor Control Timer Function
19.3.1.9
Position-Data-Retain Function
The position-data-retain function employs three position-data input pins: U-, V-, and W-phase. Input
levels of IDU, IDV, and IDW inputs are retained. The falling edge or rising edge of the high-side
output signal of each phase can be selected by setting the PDRT bit in the PDRF register as a
position-data-retain trigger.
For example, in the case of U-phase, when the U-phase trigger is generated, the state of the IDU pin
is transferred to the PDRU bit in the PDRF register. The value is retained until the next trigger of the
U-phase waveform output.
Figure 19.5 shows Position-Data-Retain Function (U-Phase) Operation.
Figure 19.5
Position-Data-Retain Function (U-Phase) Operation
U-phase
(internal signal)
Carrier wave
Transfer
Transfer
Transfer
U-phase
(internal signal)
IDU pin
PDRU bit in the PDRF register
(U-phase position-data retain bit)
Transfer
The above assumes the following:
y
The INV06 bit in the INVC0 register is 0 (triangular wave modulation mode).
y
The INV14 bit in the INVC1 register is 0 (active low).
y
The PDRT bit in the PDRF register is 0 (the falling edge of the high-side output signal is a trigger).
Содержание M16C/60 Series
Страница 853: ...M16C 64A Group R01UH0136EJ0210...