Sonic Alert msm83c154s User Manual
INTERNAL SPECIFICATIONS
81
TIMER 0
or
TIMER 1
CLOCK
DETECTOR
XTAL 1
÷
12
S3
Q
D
L
S5
INT0
or
INT1
✽
GATE
TR0 or TR1
T0 or T1
C/
T
Figure 4-10
INT
0 and
INT
1 timer/counter start/stop control circuit
Table 4-10 GATE·
INT
·TR timer/counter control tables
GATE
TR0
INT
0
RUN
STOP
TIMER 0
0
0
×
•
0
1
×
•
1
0
0
•
1
1
0
•
1
1
1
•
GATE
TR1
INT
1
RUN
STOP
TIMER 1
0
0
×
•
0
1
×
•
1
0
0
•
1
1
0
•
1
1
1
•