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R8C/18 Group, R8C/19 Group
TZS bit in TZMR
register
TZOS bit in TZOC
register
Count source
Prescaler Z underflow
signal
INT0 pin input
Contents of timer Z
IR bit in TZIC
register
TZOPL bit in PUM
register
TZOUT pin output
Figure 14.22
Operating Example in Programmable Wait One-Shot Generation Mode
Rev.1.30
Apr 14, 2006
REJ09B0222-0130
Set to 1 by program
1
0
Set to 1 by program, or set to 1 by INT0 pin
input trigger
1
0
1
0
Count starts
01h
1
0
Set to 0 by program
1
0
Wait starts
"H"
"L"
The above applies under the following conditions.
PREZ = 01h, TZPR = 01h, TZSC = 02h
PUM register TZOPL bit = 0, INOSTG bit = 1 (INT0 one-shot trigger enabled)
INOSEG bit = 1 (rising edge trigger)
Page 133 of 233
Timer Z secondary
reloads
00h
02h
01h
00h
Set to 0 when interrupt request is
accepted, or set by program
Waveform output starts
14. Timers
Set to 0 when
counting ends
Timer Z primary
reloads
01h
Waveform output ends
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