Hitachi MB-6890, Руководство по обслуживанию

Страница: 28 / 123

’ HD14IES93F!?
Input A-Output
QA :
2 digit
counter.
(4-mt
Bkmry Counter)
Input B-Output
QD :
8 digit
counter
’NTT
0- Gu
me Q.
Q.
16
counter
can
be made by connecting
output
QA
I n I
B H
and
input B.
FQ
Q. ua
Q.
EIIIIIIIIIIIIIIH
I
I
I I I
I I
INPUT Run
Run
NC vcr:
NC MQ
B
mv)
5-28
Table 5-4 16 digit
counter
Truth Table
O t
if
Cgunt
QD Qc Qs QA
I
0
I
L
I
L
I
L
I
L
I *Truth
Table
and the relationship between
reset
input
l
1
|
L
I
L L H
’
Ro
(1) and
Ro (2)
in
case
of 16 digit
counter
is made
V
connecting
output QA
and input
B
is written
at table
2
I
L L
_L
H L
5-4
and
table 5-5.
3
’
L
I
L
H H
4
1 L
I
H L L *Output changes
its
status at falling edge of the
5 L H L H
s L
H
H
L
L
7 L H
I
H H
H
8 H L
H
L L
9
I
H L L
H
10
H L H L
H
I
H L H H
I
N
12 H H L
L
13
H
H L
H
14
H H H L
- ¢
H
»
H
¢
H
_
H
.
W
di
it
out ut
digit outgut
Qc-_-5
digit
output
Qu~-~!5
digit
output
Table 5-5
Reset Mode
eseto
inpu
I
Out ut
)QD’QCEIQBlQ,\
HHLILILIL
L
X
f=9vQt
count
R f1>IR
x
I
L
I
X...Possible
both
at H
and
I
Reset_1
’TQ