Casio CZ-1 Service Manual And Spare Parts List

7.
CPU
0iPD7810H)
As
CPU
(mPD7810H)
does
not
nava
a
in tar
ml
ROM,
it
accesses
control data
for system
execusion
from
a
external
ROM
directly.
Main
CPU
and
Sub
CPU
have
different
functions.
7-1. Pin
Functions
of
Main CPU
Pin No.
Tt
rminal
Namt
In/Out
Function
1-8
PAO(SO)
-
PA7(S7)
In/Out
Data
but
for
LCD
end RAM
pack.
Signal
PA0~PA3
also
ganarata
kay
common
signal.
9
PBO
(SYC)
In
Synchronous
signal
from
CPU
intartaca LSI
vMBo4ni73l.
11 PB2
(INT)
Out
Sub CPU
intarrupt
signal.
12
PB3
(CONT)
In/Out
Control
signal
batwtan
Main and
Sub
CPUs.
13
PB4
(RCE)
Out
Chip
tnabla
signal for HAM
pack.
14 PBS
(RS)
Out
Control
signal
for
LCO
unit.
15
PB6
(R/W)
Out
Rtad/Writa
signal
for RAM pack
and
LCD
unit.
16
PB7 (LE)
Out
Enablt
signal
for
LCO
unit.
17 PCO
(TXD)
Out
MIDI
(Musical Instrumtnt
Digital
Intarfaca) data output.
18
PC1
(RXD)
In
MIOI data
Input.
19 PC2
(SCK)
In
MIOI
dock pul»
input.
20
PC3
(INT49)
In
Intarrupt
signal from
Kay intarfaca
LSI
(jf08049HC).
21
PC4
(CNT49)
Out
Control
signal of
Kay
intarfaca
LSI
(MPD8049HC).
22
PC6
(CI)
In
Timing signal
of
data
transmission
batwtan Main
CPU
and
Kay touch
control
LSI
(MSM6200).
24 PC7 (TST)
Out
Chack
signal
for intarnal ROM/RAM
of
Kay
intarfaca
LSI
(J1PD8049HC)
at
powar
ON.
26
INT1
(X896)
In
Intarrupt signal
from
Sub
CPU.
28
RESET
In Rasat
signal
input.
CPU
intarnal
circuits ara
initializad
whan tha
tarminal rtcaivts
a
LOW
(aval
pulsa
at
powar
ON.
31
XI
In
15MH1 clock pulsa input.
32 Vss
Ground
(OV)
sourca.
33 AVu
Ground
(0V)
souroa
for
intarnal
ADC
(Analog
to Digital
Convtrttr)
34 AN0
In
Modulation
whaal
input.
Voltaga
(aval
from
modulation
whaal
is
oonvtrttd
into digital data
by
built-in
AOC.
38
AN1
In Pitch bandar whaal
input.
Voltaga
laval from
pitch bandar whaal
is
convtrted
into digital
data
by
built-in
ADC.
36
AN2
In Af
tar touch
sansor
input.
Voltaga laval from
aftar touch sansor
is
convartad
into
digital
data by
built-in
ADC.
42
VAREF
Rafaranea voltaga
(+6V)
for built-in
ADCs.
43
AVce +5V powar souroa for built-in
ADCs.
44
PD
Out
Raad
signal
output.
Drops to
LOW
whan Main
CPU
raadt
data
from
paripharal
davictt.
-18-

Casio CZ-1 Specifications

General

Brand	Casio
Model	CZ-1
Category	Synthesizer
Language	English