Hitachi MB-6890, Руководство по обслуживанию

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table
5’7
Input
Enable
Select
Output
G B
A Y,
Y.I
Y,
I
Y,
H
x x
H H H
I
H
L
L
L
I
L
I
H
I
H
I
H
L
I- H
I
H
I
L
I
H
I
H
L H
L
I
H
I
H L
I
H
L H_
H
_I
H
I
H
I
H
I
L
X--~"H"
Acceptable
both "H" and "L
t a . b l ‹
5_6
I
I 1 1 D l . 1 t
Enablg
Select
_
Output
G,
of
c B A Y, Y,
Y,IY.
Y. Y. Y. Y,
x H x x
XIH
H HIH H H
H H
L x x
x
X
H
H
H H H
H H H
H L
L L L L
IHJH
HI H H H H
H L L L H
HTL
H H H H H H
IH
L L H
L H HIL H H H H H
H L
L H H H H H L H H
H H
1 L H L L H H H H
L H H H
H
Hl
L
HITTHIITIH
H H L
I
H
I
H
H L H H
L H H
IH
H H H L H
H L
H H H H HIH H H H H
L
lG,=Gu +
Gm
X : H "
Acceptable both "H"
and "L
HDNESISIP
(I
of 8Data
Selector/Multiplexer
(with
Strobe))
(sv)
I
Dafa*
inpult’
DutoASelect1
VCCQSSTABC
IS
B
I4
B
I2
| I so
Wg
D4 Ds
Dc Dr
A 3
D:
C
D2 Du
99 Y
W 5
___
’
1 2
3 4 5
s
7
3
3
2 I
o Y
w
sr}ooe
GND
ww input
output
table
5
ll
The
I/O relationship
is
per
table 5-7
5-32 consists
of data selector/multiplexer.
The strobe
input pins, when
low, select
one
input from 8 data input,
the:
transmit the data
to output W
and
Y.
When
strobe input is
H,
output
W is
H
and
output
becomes
L.
(Table
5-8).