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Pioneer DR-UA124X-2 Service Manual page 25

Cd-rom drive unit

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7. IC INFORMATION
DR- UA124X- 2, DR-
UA124X-
3
DR- UA124X- 5
The
information
shown in the list
is
basic information and may not correspond
exactly
to that shown in
the
schematic
diagrams .
• DYW1402( IC702: MOTHER BOARD ASSY)
• 1 M bit (65,536 x 16- bit) CMOS EPROM
• Pin Arrangement (Top view)
I~
~
I~
~ ~
0...
,..-,
LO
..,,.
0...
IW
>
'--'
a a
It$
0
0
• Block diagram
AO
-
A15
ADDRESS
INPUTS
'<t(Y)N
0
<fl
CJ)
(f)
< { < { < { < { < { < { >
(Y)
N
0
CJ)
ro
(f)
a a
(f)
a a a a
0
0
>
0
0
0
0
OUTPUT ENABLE
CHIP ENABLE
AND
PROG
LOGIC
y
DECODER
x
DECODER
ro
r--
<{
<{
COLO-.:t(Y)N
0
r--
a
0
<{
<{
<{
<{
<{
<{
<{
co
LO
..,,.
(Y)
N
a a a a a
0
0
0
0
0
DATA OUTPUTS
DOO
-
D015
OUTPUT
BUFFERS
y
GATING
1,048,576-
BIT
CELL MATRIX
0
@
a a
0
0
I~
31

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