Download Print this page

Hitachi MB-6890 Service Manual page 60

Hide thumbs Also See for MB-6890:

Advertisement

E
§
»
\
\g.L0|S5'$-,E
av
Ø f § § ' ‹ 2 § § § §
i
I
Signa
I
I
dis
lay
MPU
sa§§2§§g
_
X§a§§Ø;§;w1X@§a§§;@YAD§aadfess
colum
E5
ow
ada
e
s
|
swigcg signql
.
.
:
7
5
Adare
Mow
-~
'
i
'
CXS
MKAddress-W
IAPU
" "
RØafeØag
gE§%§§Øa¥witChingLow
signa
M
R
A
(IC56~IC63)
RAM
FIRST
(IC69~IC76)
SECONDWRAM
RAM
cqnoua
R A M _ A d d r
S5
StOI'Sp-(AM
__
L
23476
,g
GAP*
M
'_
1 P
Q-V
L
1.
L:
'
if
ji
(
\
vided
signal
fig.
6-20
bidiregtional
SØ%Ø3Y
(reffeSheperiodI|per§c§
_
_
I
I
I
5
'
mn'
dggØsx
ggdggØs
QQ
5
MQLQW
address
5
3
s
~
'
1
2
:
|
I
7
1
1
dis
U
§a§§a§§g
, "
G'~l9
RAM
2ig5-w
Output
lsignall
MPU
CAS1
so
I
CAS2
$4000'$7FFF
|cAscR
$400 ~s4ax-1=
l
CQ;_Qur
IC64'68
HM4716AP-1
;_
.1
1
Register
;
IC77
_f_
HD74LS174P
,
'
genereter
colour
register
58
N
'FA
1
E
=
l
I
I
:
'
'
}
,
'
t
7
'
aadfess
'
'
E E
|
'
D
1
adggesx
X
a-»reSS
E S
-
e
I
1
1
I
f--1
M
Kddress
column
addre
switching
address
of
CAS
signals
period
gØegjggy
|
~$3FFF
5400
sgppp
$4000
$43FF
$400
5435?
Y
kgrf-
Em
!-+4
Q5
*gb
§
E
F?
method
signal

Advertisement

loading