Casio CZ-1 Service Manual And Spare Parts List

Pin No.
Ttrminal
Nama
In/Out
Function
46
WR
Out
Writs
signal
output.
Oropt
to LOW
whan Main CPU
writtt
dau
into
paripharal
dtvicat.
46
ALE
Out
Addrass
latch
tnabla
signal
output.
Dau
signals
00-07
btcoma
addrtu
signals
AO—
A7
whan
tha
ttrminal
risas
to HIGH.
47-64
PFO
(A8)
-
PF7
(A1S)
Out
Uppar
addrass
signals (A8
-
A
16).
55-62 PDO
(DO)
-
PD7 (D7)
In/Out
Data
signals (DO
-
D7).
63.64
VDD,
Vcc
+5V
powar sourca.
7-2. Pin
Functions
of Sub
CPU
Pin No.
Ttrminal
Nama
In/Out
Function
1-8
PAO (LO)
-
PA7
(L7)
Out
LED
driva
signals output.
9
PBO
In
Intarrupt
raquast signal
input
from
Masttf
Music
LSI.
10
PB1
In
Intarrupt raquast
signal input
from
Slavs
Music LSI.
11 PB2
Out
Mastar Musk
LSI
chip saiact
signal
output.
12
PB3
Out
Slavt
Music
LSI
chip
saltct
signal output.
13
PB4
Out
Writa
tnabia
signal
for Music
LSIs.
14 PB5
Out
ID
(Intarrupt
Disabla)
signal
output.
Whan
Sub
CPU is
busy,
it
sands ID
signal
to
Music
LSIs so
as
not
to bt
intarruptad.
16
PB6
(LDC)
Out
Stays
HIGH
Itvtl for approximataly
830
millisaconds aftar powar switch
is
turnad
on in
ordar
to
avoid mil-
lighting
of
LEDs
and shock noisa on powar
UP.
17
PCO (LID
Out
LED
driva signal
output.
18 PC1 (SYC)
In Synchronous signal from Main
CPU.
19 PC2 (CONT)
In/Out
Control signal batwttn
Main and
Sub CPUs.
20 PC3
(INT2)
In Intarrupt
signal from
Music
LSIs.
22-24
PC5
(L8)
-
PC7
(L10)
Out LED
driva
signals
output.
26
INT1
In Intarrupt
signal from
Main
CPU.
28 RESET
In
Rasat signal
input.
Tha ttrminal
racaivas
a LOW
Itvtl
pulsa
at
powar
ON.
CPU
intarnal
circuits
ara initializad than.
31 XI In
1 5MH z
clock
pulsa input.
32
Vsi Ground
(OV)
sourca.
44
RD
Out Raad signal
output.
Drops
to
LOW
whan
Sub CPU
raads
data
from
paripharal
dtvicat.
46 WR Out
Writa
signaJ
output.
Drops
to
LOW
whan
Sub
CPU
writtt
dau into paripharal
davicas.
46
ALE Out
Addrtu
latch
anabla signal
output.
Dau
signals
D0-D7 btcomt addrass signals
AS0-AS7
whtn
tha urminal
risas
to HIGH.
-19-

Casio CZ-1 Specifications

General

Brand	Casio
Model	CZ-1
Category	Synthesizer
Language	English