SH7261 datasheet(522/1348 Pages) RENESAS

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Section 12 Multi-Function Timer Pulse Unit 2 (MTU2)

Rev. 2.00 Sep. 07, 2007 Page 490 of 1312

REJ09B0320-0200

12.4.7

Reset-Synchronized PWM Mode

In the reset-synchronized PWM mode, three-phase output of positive and negative PWM

waveforms that share a common wave transition point can be obtained by combining channels 3

and 4.

When set for reset-synchronized PWM mode, the TIOC3B, TIOC3D, TIOC4A, TIOC4C,

TIOC4B, and TIOC4D pins function as PWM output pins and TCNT_3 functions as an upcounter.

Table 12.52 shows the PWM output pins used. Table 12.53 shows the settings of the registers.

Table 12.52 Output Pins for Reset-Synchronized PWM Mode

Channel

Output Pin

Description

TIOC3B

PWM output pin 1

TIOC3D

PWM output pin 1' (negative-phase waveform of PWM output 1)

TIOC4A

PWM output pin 2

TIOC4C

PWM output pin 2' (negative-phase waveform of PWM output 2)

TIOC4B

PWM output pin 3

TIOC4D

PWM output pin 3' (negative-phase waveform of PWM output 3)

Table 12.53 Register Settings for Reset-Synchronized PWM Mode

Description of Setting

TCNT_3

Initial setting of H'0000

TCNT_4

Initial setting of H'0000

TGRA_3

Set count cycle for TCNT_3

TGRB_3

Sets the turning point for PWM waveform output by the TIOC3B and TIOC3D pins

TGRA_4

Sets the turning point for PWM waveform output by the TIOC4A and TIOC4C pins

TGRB_4

Sets the turning point for PWM waveform output by the TIOC4B and TIOC4D pins

SH7261 Datasheet(PDF) 522 Page - Renesas Technology Corp