Renesas R8C/20 User Manual

R8C/20 Group, R8C/21 Group 14. Timers
Rev.2.00 Aug 27, 2008 Page 154 of 458
REJ09B0250-0200
Figure 14.24 Operation Example of Programmable Wait One-Shot Generation Mode
TOSSTF bit in TRBOCR
register
INT0 pin input
1
0
1
0
IR bit in TRBIC
register
1
0
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 1 by setting 1 to TOSST bit in TRBOCR
register, or INT0 pin input trigger
Set to 0 when interrupt request is
acknowledged, or set by program
The above applies to the following conditions.
TSTART bit in TRBCR
register
1
0
1
0
01h 00h 00h 01h
Count starts
Timer RB secondary reloads Timer RB primary reloads
Set to 0 by program
Wait starts Waveform output starts Waveform output ends
Set to 0 when
counting ends
TRBPRE = 01h, TRBPR = 01h, TRBSC = 04h
INOSTG = 1 (INT0 one-shot trigger enabled)
INOSEG = 1 (edge trigger at rising edge)
04h 03h 02h 01h
Wait
(primary period)
One-shot pulse
(secondary period)

Renesas R8C/20 Specifications

General

Brand	Renesas
Model	R8C/20
Category	Control Unit
Language	English