SH7021 datasheet(283/509 Pages) RENESAS

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SH7021 Datasheet(PDF) 283 Page - Renesas Technology Corp

Part #	SH7021

Description	SuperH??RISC engine

PDF	509 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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283 / 509 page

RENESAS 267

sequence TCNT3, TCNT4, TCNT4, TCNT3 (in this mode, TCNT3 starts out larger than TCNT4).

Figure 10.35 shows examples of PWM waveforms with 0% and 100% duty cycles (in one phase)

in the complementary PWM mode. In this example, the pin output changes upon GRB3 compare

match, so duty cycles of 0% and 100% can be obtained by setting GRB3 to a value larger than

GRA3. Combining buffer operation with the above operation makes it easy to change the duty

while operating. See section 10.4.8, Buffer Operation, for details.

Down-counting starts at compare match

between TCNT3 and GRA3

TCNT3

TCNT4

TCNT3, TCNT4 value

GRA3

GRB3

GRA4

GRB4

TIOCA3

TIOCB3

TIOCA4

TOCXA4

TIOCB4

TOCXB4

Up-counting starts at TCNT4 underflow

Time

Figure 10.34 Complementary PWM Mode Operation Example 1

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