Casio CZ-1 Service Manual And Spare Parts List

16.
PIN FUNCTION OF
MUSIC
LSI (jiPD933AC)
Pin
No.
Ttrminal Namt
In/Out
Function
1
wl
In Writt tnabla
ttrminal.
At LOW,
tht
LSI
rtctivts data
from
SUB
CPU.
2
WS
In
Writa
ttrobo
urmiral.
SUB
CPU
writt*
data
into
Music
LSI
at
tht
rising
tdgo of
tht
signal.
3
RQ
Out
Rtqutst
signal ttrminal. At
LOW.
4 10
In
Inttrrupt
distnablt
ttrminal. At LOW*
tht
LSI
rtotivts inttrrupt
mask
signal.
6
M/S
In
Masttr
or Slave
dtttrmination
ttrminal.
Whan
LOW,
tht
LSI
btcomts
Slavt LSI
whilt
it
btoomts
Mastar
LSI
whtn
tht ttrminal
is HIGH.
7
SYC
In/Out
Synchronous signal input/output
ttrminal.
Tht
synchronous signal is
stnt
from
Masttr
LSI
to
Slavt
LSI.
8
cue
In
4.48 MHi clock
pulst
input.
10
GND
Ground
(OV)
sourct.
11
RST
In
Rsstt signal input.
Normally tht ttrminal
stays LOW.
At
powtr
ON,
tht
ttrminal
fists
to
HIGH
Itvtl
for
a
whilt
and
tht inttrnal circuits
of
tht
LSI
art initiallxtd.
12
OOE
In/Out
Data
output
tnabla
ttrminal.
At HIGH, digital sound signals
art
output
from
Mastar
LSI
whilt
Slavt
LSI
outputs
sound signal
at
LOW
Itvtl.
13
SH
Out
40 KHz sampling signal for
Samplt &
Hold
circuit.
15*17
001*00?
Out
Control
signals for Expander circuit.
18*20
004*0015
Out
12-bit digital
sound signals.
30
VOO +5V powtr
sourct.
31-38
0B7
*
OBO In/Out 8-bit
data bus bttwttn
Music LSIs and
SUB CPU.
39
CS
In
Chip
stltct ttrminal.
At
LOW,
tht
LSI
is
dtsignatad
by SUB CPU.
40
RD
In
Rtad
data
ttrminal.
At
LOW, tht
LSI
stnds
data
to
SU8 CPU.
-42-

Casio CZ-1 Specifications

General

Brand	Casio
Model	CZ-1
Category	Synthesizer
Language	English