SH7080 Datasheet, PDF (628/1644 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 11 Multi-Function Timer Pulse Unit 2 (MTU2)
 Example of Procedure for Setting Output Waveform Control at Synchronous Counter
Clearing in Complementary PWM Mode
An example of the procedure for setting output waveform control at synchronous counter
clearing in complementary PWM mode is shown in figure 11.57.
Output waveform control at
synchronous counter clearing
Stop count operation
[1]
Set TWCR and
complementary PWM mode ^[2]
Start count operation
[3]
[1] Clear bits CST3 and CST4 in the timer
start register (TSTR) to 0, and halt timer
counter (TCNT) operation. Perform
TWCR setting while TCNT_3 and
TCNT_4 are stopped.
[2] Read bit WRE in TWCR and then write 1
to it to suppress initial value output at
counter clearing.
[3] Set bits CST3 and CST4 in TSTR to 1 to
start count operation.
Output waveform control at
synchronous counter clearing
Figure 11.57 Example of Procedure for Setting Output Waveform Control at Synchronous
Counter Clearing in Complementary PWM Mode
 Examples of Output Waveform Control at Synchronous Counter Clearing in
Complementary PWM Mode
Figures 11.58 to 11.61 show examples of output waveform control in which the MTU2
operates in complementary PWM mode and synchronous counter clearing is generated
while the WRE bit in TWCR is set to 1. In the examples shown in figures 11.58 to 11.61,
synchronous counter clearing occurs at timing (3), (6), (8), and (11) shown in figure 11.56,
respectively.
In the MTU2S, these examples are equivalent to the cases when the MTU2S operates in
complementary PWM mode and synchronous counter clearing is generated while the SCC
bit is cleared to 0 and the WRE bit is set to 1 in TWCR.
Rev. 3.00 May 17, 2007 Page 570 of 1582
REJ09B0181-0300