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IC404 4Bit Single Chip Microcomputer
IC
UPD75P008GB
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33
34
44
•
• Description
Pin
Port
No.
Name
I
P72
2
P71
3
P70
4 P63
5 P62
6
P6I
7
P60
8 P53
9 P52
10
PSI
II
PSO
13
P43
14
P42
I5
P41
16
P40
23 P33
24
P32
25
P31
26 P30
27
P81
28 P80
29 P03(SI)
30
P02(S0)
31
POl(SCK)
32
POO(INT4)
33
Pl3
35 Pl2(1NT2)
36
Pl
l(INTI)
37 PIO(INTO)
40
P23
41
P22
42
P21
43
P20
44
P73
IC UPD75006GB
23
22
12
11
Pin
1/0
Function
Name
-
Not used.
MUTG
0
Digital muting control for CXDI l 67Q. "H": Muting.
TIRO
-
Not used.
CLK
XLT
0
Serial data transfer to CXA1082BQ and CXDI 167Q.
DATA
GAIN
-
Disc servo gain switching.
TDB3
-
TDB2
-
TOBI
Not used.
-
TDBO
-
DB3
DB2
1/0
Data bus with the host CPU.
DBI
DBO
-
-
Not used.
L-MUTE 0
Muting output. "L": during music play, "H": in other modes.
CDCK
0
CD mechanism control clock.
IRQ
0
Interrupt request.
I
Open/close switch.
HOCK I Host CPU clock.
SUBO
I
0-code
serial data input.
-
-
Not used.
SOCK
0
Serial clock to read 0 codes.
- -
Not used.
-
-
Not used.
-
-
Not
used.
SCOR I
External interrupt request to read O codes. Interrupt at the leading edge.
SENS I I
CXA1082/CXD11670 sensing input.
THOCK
-
Not used.
TES
TI
I
Test input. "H": Normal,
"L"
: Test.
FOK
I Focus
OK
signal input.
SENS
I
CXA1082/CXDI
1670
sensing input.
LOON 0
Laser diode on/off switching. "H": LD ON.
35
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