User Guide

ElN.eoooF
r
Terminal
No.
Symbol
Name
l/o
Terminal Function
44 AD5
vo Data
bus 5.
Mask
item
-
fixed to
"L".
45 AD4
UO Dala
bus 4. Mask
item
-
fixed to
"L".
46
AD3
vo
Data bus 3.
Mask
item
-
fixed
to
"L"
47 ADz
t/o
Data bus
2. Mask
item
-
fixed to
"L'.
48 AD1
l/o Data bus
1.
Mask item
-
fixed to
"U.
49
ADO
t/o Data
bus 0.
Mask item
-
lixed to
"L'.
JU ASTB
o
Pulse
for
address
latch. Mask
item
-
tixed
to
"L".
'
51
Vss
0V
power
supply.
az Vss
0V
power
supply.
5J
Not connected.
54
MODE
Memory read
select
terminal. Extemal
ROM use at
"H",
mask
ROM use at
"L".
Mask item
-
"L",
extemal
ROM
-
"H".
Not connected.
Jb AMUTE
o
Audio output
mute signal.
Mute at
"H".
socK
o
Clock
for sub-code
reading.
58 SENS
I
Indication siqnalof
servo
actuating
condition.
Emits
lrom
lC2.
59 CLOSE-
Trav CLOSE switch.
CLOSE state
at
"L".
60
Not connectecl.
61 OPEN-
Trav OPEN switch.
OPEN state
at'L".
62 SOSO
Sub---code
data
input. Emits
from
lC2.
63
DFLAT
o Command
latch
pulse
for
digital
filter.
Output
to
1C300.
64
Not used.
Fixed to
"H".
Voo
+5vtrower
supply
Voo
+5v
power
supply.
OI LDIN
Analog
input
for
tray
drive servo.
68 STIN
Input
for between
microcomputers
communication.
Connected
to STOUT
of the other
mechanism
microcomuter.
To
mmmu-
nicate
with 3 kinds of
voltages,
i.e.
0V
2.5V, 5V.
Not used. Fixed
to
"L"
70
Not connected
71 Not used.
Fixed to
"L"
72
Not used. Fixed
to
"L".
IJ
Not used.
Fixed
to
"L".
74
I
Not used. Fixed
to
"L".
Not used.
Fixed to'L".
76 AVoo
+5V
power
supply
for A,/D converter.
T7
AVREFl
+5V.
A,/D converter
reference
voltage.
78
Not connected.
79
AVss
0V
power
supply
for
A'lD converter.
80
LOADER
o
Tray drive
signal. Stops
at
2.5V CLOSE
aclion al
3V
OPEN
action at
2V.
81
STOUT
Output
lor microcomputer
communication.
Connects
to STIN of
the other
microcomputer.
Communicates
with 3
kinds oJ
volt-
aoes.
i.e. OV,2.5V,5V.
82
AVREF2
+5V. D/A converter
reference
voltage.
83
AVREF3
0V.
D/A converter
reference
voltage.
u
Not connected.
63
Not used.
Fixed to
OV.
86
EJSW-
EJECT/OPEN
switch
input. Connected
to
the switch
of front
panel.
Shifts
to
"L"
when the switch
is
pressed.
dt RST
lnput for
+5V voltage
observation. Shitts
to
"H"
when POWER
switch
is tumed off.
88
WFCK
Connected
to
WFCK output ol
lC2. 7.35kHz
clock.
89 SCOR
Sub-code
sink
input. Connect
to lC2.
Input 75
pulses per
1
second.
qo
DRDY
Data
receivinq
READY signal of
1C201.
Fixed
to
"H".
91
Not
used.
Fixed to
"L'
92
OVF-
Over
flag of
1C201. Normally
"H'
93
RXD-
I
Serial
interface
reception dala.
94
TXD-
o Serial
intertace transmission
data.
25