R8C2K datasheet(182/471 Pages) RENESAS

182 / 471 page

R8C/2K Group, R8C/2L Group

16. Timers

Rev.1.10

Dec 21, 2007

Page 165 of 450

REJ09B0406-0110

Figure 16.22

Operating Example of Programmable One-Shot Generation Mode

TOSSTF bit in TRBOCR

INT0 pin input

IR bit in TRBIC

Count source

Timer RB prescaler

underflow signal

Counter of timer RB

TRBIO pin output

TOPL bit in

TRBIOC register

Set to 1 by program

Set to 0 when interrupt request is

acknowledged, or set by program

The above applies under the following conditions.

TSTART bit in TRBCR

01h

00h

01h

00h

01h

Count starts

Timer RB primary reloads

Count starts

Timer RB primary reloads

Set to 0 by program

Waveform output starts

Waveform output ends

Waveform output starts

Waveform output ends

Set to 0 when

counting ends

Set to 1 by INT0 pin

input trigger

TRBPRE = 01h, TRBPR = 01h

TRBIOC register TOPL = 0, TOCNT = 0

INOSTG = 1 (INT0 one-shot trigger enabled)

INOSEG = 1 (edge trigger at rising edge)

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