Renesas M16C/64A Series User Manual page 379

M16C/64A Group
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.
Carrier wave
(internal signal)
(internal signal)
PDRU bit in the PDRF register
(U-phase position-data retain bit)
The above assumes the following:
The INV06 bit in the INVC0 register is 0 (triangular wave modulation mode).
The INV14 bit in the INVC1 register is 0 (active low).
The PDRT bit in the PDRF register is 0 (the falling edge of the high-side output signal is a trigger).
Figure 19.5 Position-Data-Retain Function (U-Phase) Operation
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
U-phase
U-phase
IDU pin
Transfer
19. Three-Phase Motor Control Timer Function
Transfer Transfer
Transfer
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