Table of Contents
Advertisement
Example of PWM Mode Setting Procedure: Figure 9-24 shows an example of the PWM mode
setting procedure.
PWM mode
Select counter clock
Select counter clearing source
Select waveform output level
Set TGR
Set PWM mode
Start count
<PWM mode>
Figure 9-24 Example of PWM Mode Setting Procedure
Examples of PWM Mode Operation: Figure 9-25 shows an example of PWM mode 1 operation.
In this example, TGRA compare match is set as the TCNT clearing source, 0 is set for the TGRA
initial output value and output value, and 1 is set as the TGRB output value.
In this case, the value set in TGRA is used as the period, and the value set in TGRB as the duty.
Rev. 5.00, 12/03, page 352 of 1088
[1] Select the counter clock with bits TPSC2 to
TPSC0 in TCR. At the same time, select the
input clock edge with bits CKEG1 and CKEG0 in
TCR.
[1]
[2] Use bits CCLR2 to CCLR0 in TCR to select the
TGR to be used as the TCNT clearing source.
[2]
[3] Use TIOR to designate the TGR as an output
compare register, and select the initial value and
output value.
[3]
[4] Set the period in the TGR selected in [2], and
set the duty in the other TGR.
[4]
[5] Select the PWM mode with bits MD3 to MD0 in
TMDR.
[5]
[6] Set the CST bit in TSTR to 1 to start the count
operation.
[6]
Advertisement
Table of Contents
