Datasheet

Section 11 16-Bit Timer Pulse Unit (TPU)

Page 760 of 1408 R01UH0309EJ0500 Rev. 5.00

Sep 24, 2012

H8S/2456, H8S/2456R, H8S/2454 Group

(1) 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