SH7721 datasheet(599/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 15

16-Bit Timer Pulse Unit (TPU)

Rev. 3.00 Jan. 18, 2008 Page 537 of 1458

REJ09B0033-0300

(1)

Example of PWM Mode Setting Procedure

Figure 15.11 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 period

[4]

Set PWM mode

[5]

Set external pin function

[6]

Start count

[7]

[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

TGRB to be used as the TCNT clearing source.

[3] Use TIOR to select the initial value and

output value.

[4] Set the period in TGRB, and set the duty in

TGRA.

[5] Select the PWM mode with bits MD3 to MD0 in

TMDR.

[6] Set the external pin function in pin function

controller (PFC).

[7] Set the CST bit in TSTR to 1 to start the count

operation.

Figure 15.11

Example of PWM Mode Setting Procedure

SH7721 Datasheet(PDF) 599 Page - Renesas Technology Corp