SH7046 Datasheet, PDF (271/611 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7046 Series

Section 10 Multi-Function Timer Pulse Unit (MTU)
Complementary PWM Mode 0% and 100% Duty Output: In complementary PWM mode, 0%
and 100% duty cycles can be output as required. Figures 10.43 to 10.47 show output examples.
100% duty output is performed when the data register value is set to H'0000. The waveform in this
case has a positive phase with a 100% on-state. 0% duty output is performed when the data
register value is set to the same value as TGRA_3. The waveform in this case has a positive phase
with a 100% off-state.
On and off compare-matches occur simultaneously, but if a turn-on compare-match and turn-off
compare-match for the same phase occur simultaneously, both compare-matches are ignored and
the waveform does not change.
Toggle Output Synchronized with PWM Cycle: In complementary PWM mode, toggle output
can be performed in synchronization with the PWM carrier cycle by setting the PSYE bit to 1 in
the timer output control register (TOCR). An example of a toggle output waveform is shown in
Figure 10.48.
This output is toggled by a compare-match between TCNT_3 and TGRA_3 and a compare-match
between TCNT4 and H'0000.
The output pin for this toggle output is the TIOC3A pin. The initial output is 1.
TGRA_3
TCNT_4
TCNT_3
H'0000
Toggle output
TIOC3A pin
Figure 10.48 Example of Toggle Output Waveform Synchronized with PWM Output
Rev. 4.00 Dec 05, 2005 page 227 of 564
REJ09B0270-0400