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Hitachi MB-6890 Service Manual page 29

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ZSAEP
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Buffer
Bus
(Quadruple
with.
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Gil
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sem:
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(Dual
2~Line
4-Line
to
Decoders/Demultiplexers)
Select
Input
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m
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Enable?
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Input
Gates
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.
8
6
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GND
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input
output
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t
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9
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GND
Output
7"v
Of
5-29
Consists
When
control
input
input
(A)
and
output
becomes
High
Impedance
is
(H).
5-30
consists
of
One
of
the
8
output
3
select
input
and
c.
._
_
relatlon
lS
as
per
5-31
COF¢sists
of
two
/
GGCOUSP
_
Decoding/demultiplexing
2
select,
and
enable
4
pieces
of
three
is
(C)
the
Low,
space
(Y)
becomes
buffer
"HZ"
when
control
3
line-8
line
decoder,
line
of
3
select
3
enable
input.
The
t-
e
i
table
5-6
next
1n
independent
2
line-4
is
dependent
upon
pins.
state
gates
between
and
output
input
(C)
input
and
I/O
page.
line
the

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