H8SSLASH2224 datasheet(499/1071 Pages) RENESAS

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Section 11 16-Bit Timer Pulse Unit (TPU)

Rev. 5.00 Aug 08, 2006 page 413 of 982

REJ09B0054-0500

Example of PWM Mode Setting Procedure: Figure 11.21 shows an example of the PWM mode

setting procedure.

Select counter clock

PWM mode

Select counter clearing source

Select waveform output level

[1]

[2]

[3]

Set TGR

[4]

Set PWM mode

[5]

Start count

[6]

[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.

[2]

Use bits CCLR2 to CCLR0 in TCR to select the

TGR to be used as the TCNT clearing source.

[3]

Use TIOR to designate the TGR as an output

compare register, and select the initial value and

output value.

[4]

Set the cycle in the TGR selected in [2], and

set the duty in the other TGRs.

[5]

Select the PWM mode with bits MD3 to MD0 in

TMDR.

[6]

Set the CST bit in TSTR to 1 to start the count

operation.

Figure 11.21 Example of PWM Mode Setting Procedure

Examples of PWM Mode Operation: Figure 11.22 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 cycle, and the values set in TGRB registers as

the duty cycle.

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