Casio CZ-1 Service Manual And Spare Parts List page 85

10-1
.
Function of
Each Block
F/F
1
-
Set
by the clock pulse
'0' end
signal
R2
from
SUB CPU, end
generetes
signet
SYC
which synchronizes
MAIN
end
SUB
CPUs.
FUNCTION TABLE
INPUT
OUTPUT
PRESET CLEAR
CLOCK
Q
L
H
X X H
L
H
L
X X
L
H
L L
X X M
#
H»
M H
t
H H
L
H
H
t
L L
M
H
H L X Oo Q«
Decoder
1
-
Generates clock pulses for the latches
from
signals
AO -
A3. A14,
A
15.
PO
andWR.
FUNCTION TABLE
Latch 2
Latch
3
Latch 4
Latch
5
ENABLE
INPUT
SELECT
INPUT
OUTPUT
G1
G2* c
e
A
VO VI Y2 Y3 Y4 vs ve V7
X
H
XXX
H H H H H H H H
L
X
XXX
N M H H H H M
N
M
L L L L L
H H H M
H
H
H
H
L L L
M
H
L
H M M
H M
H
H
L L
H
L
H
H
L
M H
M
H M
H
L L
M H H H M
L
H
H
M
H
H
L
M
L
L H
H H H
L
H
H H
N
L
H
H
L
H N M H M
H
L
H
N
L
M
H M H H H M H
H
H
L
•52-52A*53B
Letch
1
-
Converts
MAIN
CPU's
dete
bus (00
-
07)
into eddress bus
AO -
A7, end
generates clock pulses
'0'
-
'5\
For
data transfer
from
MAIN CPU
to
SUB
CPU.
Transfers date
from
pitch
bender end modulator wheel
to
SUB
CPU.
For
data
transfer
from
SUB CPU
to
MAIN
CPU.
Converts
SUB
CPU's
deta bus (DSO
-
0S7)
into address
bus
ASO -
AS7.
FUNCTION TABLE
(EACH LATCH)
FUNCTION TABLE
(EACH FLIP-FLOP)
INPUT OUTPUT
6c
ENABLE
L
H H H
L
H
L L
L L
X
Q%
H X X
2
INPUT
OUTPUT
6c CLK
L
t
H
H
L
t
L L
L
X
©•
t
X X
z
Latch
1
andS
Uich
2^4
-24-