Casio CZ-1 - Page 94

Pin No.
Tarminal Nam*
In/Out
Function
12-10
DB0~DB7
In/Out Data but
(DO
~
D7)
batwaan MSM6200.
20
Vtt
Ground
(0V)
touroa.
26
voo
+6V
sourca.
27-34
P10-P17
Out Dm
but
(00
~
07)
batwaan Main
CPU.
36
P25 (CNT49)
In
Control
signal
input
from
CPU.
37
P26
(INT49)
Out
Inttrrupt signal output to CPU.
38
P27
(WR49)
Out
Timing
pulsa output
for data
raad/writa.
39
T1
(TST)
In
Ttst
signal input.
Kay
intarfaca
LSI
dots
salfchack
of
intarnal
RAM/ROM
at
LOW.
40 VCC
|
5V
sourca.
11-6.
Kay
Touch Data
Communication
(1)
Block
Diagram
<3d
02
03
55
04
KC1A
-J
06
KC2B
§
^
101
103
103
104
«
11
01
12
*
s
14
13
16
I/O
RESE
From rasat
circuit
Kay touch
control
LSI
fatchas
tha
data
of
kay
antry
and kay
touch
spaed
from
keyboard,
than
the
data
are
transmitted
to Main
CPU
via
Kay interlace
LSI which
is
a buffer.
The
Key
interface
LSI
quicken
the
data
communication
between
the
Key touch
control
LSI
and the
CPU.
.33-