SH7101 datasheet(215/560 Pages) RENESAS

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Section 8 Multifunction Timer Pulse Unit (MTU)

Rev.1.00 Sep. 18, 2008 Page 181 of 522

REJ09B0069-0100

8.4.7

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 TCNT3 functions as an upcounter.

Table 8.37 shows the PWM output pins used. Table 8.38 shows the settings of the registers.

Table 8.37

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 8.38

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

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