SH7014 datasheet(274/754 Pages) RENESAS

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10. Multifunction Timer Pulse Unit (MTU)

Rev.5.00 Sep. 27, 2007 Page 240 of 716

REJ09B0398-0500

10.4.6

PWM Mode

PWM mode outputs the various PWM waveforms from output pins. Output levels of 0 output, 1

output, or toggle output can be selected as the output level for the compare-match of each TGR.

A period can be set for a register by using the TGR compare-match as a counter clear source. All

channels can be independently set to PWM mode. Synchronous operation is also possible.

There are two PWM modes:

• PWM mode 1

Generates PWM output using the TGRA and TGRB registers, and TGRC and TGRD registers

as pairs. The initial output values are those established in the TGRA and TGRC registers.

When the values set in TGR registers being used as a pair are equal, output values will not

change even if a compare-match occurs.

A maximum of four-phase PWM output is possible for PWM mode 1.

• PWM mode 2

Generates PWM output using one TGR register as a period register and another as a duty cycle

TIOR register. When the values set in the period register and duty register are equal, output

values will not change even if a compare-match occurs.

Table 10.7 lists the combinations of PWM output pins and registers.

Table 10.7

Combinations of PWM Output Pins and Registers

Output Pin

Channel

PWM Mode 1

PWM Mode 2

0 (AB pair)

TGR0A

TGR0B

TIOC0A

TIOC 0A

TIOC 0B

0 (CD pair)

TGR0C

TGR0D

TIOC0C

TIOC 0C

TIOC 0D

TGR1A

TGR1B

TIOC1A

TIOC 1A

TIOC 1B

TGR2A

TGR2B

TIOC2A

TIOC 2A

TIOC 2B

Note:

PWM output of the period setting TGR is not possible in PWM mode 2.

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