M16C65 Datasheet, PDF (418/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
19. Three-Phase Motor Control Timer Function
19.3.1.9 Position-Data-Retain Function
Three position-data input pins for U-, V-, and W-phases are available. 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 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 at the IDU pin
is transferred to the PDRU bit in the PDRF register. Until the next trigger of the U-phase waveform
output, the value is retained.
Figure 19.5 shows Usage Example of Position-Data-Retain Function (U-Phase).
Carrier wave
U-phase waveform output
(internal signal)
U-phase waveform output
(internal signal)
IDU pin
PDRU bit in the PDRF register
(U-phase position data retain bit)
Transfer
Transfer
Transfer
Transfer
The above applies under the following conditions:
y The INV06 bit in the INVC0 register is 0 (triangular wave modulation mode).
y The PDRT bit in the PDRF register is 0 (the falling edge of upper energization signal is a trigger).
Figure 19.5 Usage Example of Position-Data-Retain Function (U-Phase)
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 383 of 791