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3-5.
CG CONTROL
MICROCOMPUTER
(CXP80316: IC102 on MC-67 Board)
PORT
FUNCTIONS
AND
INPUT/OUTPUT
LEVEL
Pin No.
|
Signal
"a
Function
1
KO6
oO
|
|
|
Key scan signal output.
10
KO15
oO
11
KI7
I
|
|
Key scan signal input.
18
KIO
I
19
Cc. CS
oO
Chip select signal to CG IC (1C504 on VI-60 board).
Chip select signal to digital memory
control IC (IC502 on VI-60
board).
GRAYOUT
Oo
Gray back signal output.
RESET
O
Reset signal to CG/digital memory
control IC.
a
23
LEDINS
Oo
Drive signal output of INS LED.
24
LEDCAP
Oo
Drive signal output of CAPITAL
LED.
25
LEDSHIFT
O
Drive signal output of SHIFT LED.
|
Vss
~
GND
terminal.
Notused.
Crystal connection terminal for system clock oscillation.
30
RESET
I
Reset signal input.
|
Not used.
Not used.
33
—_——
I
Not used,
|
sO
O
Serial out to main microcomputer (IC206 on MC-67 board).
:
SI
J
Serial in from main microcomputer.
:
CLK
O
Serial clock from main microcomputer,
|
Serial chip select from main microcomputer.
38
NT/PAL
I
NTSC/PAL
select signal.
39
oo
)
|
|
|
|
Not used.
46
—-
O
47
CD SO
O
Serial out to CG/digital memory control IC.
48
CD SCK
Serial clock to CG/digital memory control IC.
Busy signal from digital memory
control IC.
Signal from digital memory
2/4 changeover switch.
V SYNC input.
Discrimination input signal on presence of external signal output.
EXT/INT
L~>H:
Falla sleep,
H > L: Get up
P.FAIL
Not used.
—39—
|
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