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DR-U124X-1, DR-U124X-4, DR-U124X-PA
No.
Pin
Name
1/0
Description
No.
Pin Name
1/0
Description
-
17
Vsso
-
GND (Logic part)
73
RD
I
Data
read
signal
input
of
micro-computer
-
18
IOO
Data
buffer
RAM data
signal
I
I
1/0
25
107
(built-in pull-up
resistor)
74
WR
I
Data
write
signal
input of
micro-computer
-
Chip select
signal
input
from
75
cs
I
micro-computer
- -
SCSI
block
interrupt/request
signal
output
26
INTl
0
(setting at register)
76
RS
I
Register
select signal
27
Vsso
77
Vsso
-
GND
(Logic part)
-
GND (Logic part)
- - -
28
Vsso
78
SWAIT
0
SUB-CPU wait
signal
29
DO
Micro-computer
data signal
I
I
1/0
36
D7
(Built-in
pull-up
resistor)
79
EXCK
0
SUB-CODE output
(connected
to
CD-DSP)
80
MCK
0
Oscillation
frequency
output of XT
ALCK
- -
Interrupt/request
signal output to
.
37
INTO
0
micro-computer
81
TES TO
I
Input
terminal for test (Vsso)
- -
82
RCS
0
Chip
select
signal
to
RAM
38
XTALCK
I
X'tal oscillation circuit
input
- -
83
RWE
0
Data
write signal to RAM
39
XTAL
0
X'tal oscillation
circuit
output
- -
84
ROE
0
Data read signal from
RAM
40
Vsso
-
GND (Logic part)
85
41
VDD
-
Power
supply
I
NC
NC
Not connect
88
42
RAO
Address signal output to data buffer
RAM
I
I
0
59
RA17
(built-in
pull-up resistor)
89
VDD
-
Power supply
90
Vssl
-
GND for SCSI I/F driver
60
VDD
-
Power supply
-
-
91
DBO
61
Vsso
-
GND (Logic
part)
1/0
SCSI terminal
- -
92
DBl
- - -
62
RESET
I
Reset terminal
93
Vssl
-
GND for SCSI l/F driver
63
TESTl
- -
94
DB2
64
TEST2
I
Input
terminal
for test (Vsso)
1/0
SCSI
terminal
- -
95
DB3
65
TEST3
96
Vssl
-
GND for SCSI
I/F driver
66
WFCK
- -
97
DB4
67
SBSO
I
SUB-CODE
input
(connected
to CD-DSP)
1/0
SCSI
terminal
- -
98
DB5
68
SCOR
99
Vssl
-
GND for SCSI
I/F
driver
69
SDATA
I
CD-ROM,
CD-DA serial data input
- -
100
DB6
110
SCSI terminal
70
BCK
I
CD-ROM,
CD-DA
serial
data
input clock
71
LRCK
I
44.1 (88.2) kHz strobe
signal
input
72
C2PO
I
C2
pointer
input
1
5
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