Yamaha GX-700 Service Manual page 30

GX-700/GX-700VCD
IC11 : M38199EF [P.C.B. CD/VCD]
µ
8 bit -COM (CD CPU)
Pin No. Port
28 P46
29 INT1
30 INT4
INT3
31
32 INT2
33 P41
34 INT0
35 /RESET
36 XCIN
XCOUT
37
38 XIN
39 XOUT
40 VSS
41 P27
42 P26
43 P25
44 P24
45 P23
46 P22
47 P21
48 P20
49 P17
P16
50
51 P15
52 P14
53 P13
54 P12
55 P11
56 P10
57 P07
58 P06
59 P05
60 P04
61 P03
62 P02
63 P01
64 P00
65 P37
66 P36
67 P35
68 P34
69 P33
70 P32
71 P31
72 P30
73 P97
74 P96
75 P95
76 P94
77 P93
78 P92
79 P91
80 P90
81 P87
P86
82
83 P85
84 P84
29
Name I/O
Open
BLKCK I Q-code read OK signal
Open
Open
Decoder interrupt signal
/HINT I
DEPH O De-emphasis control
System µ-COM data automatic transfer initialize, start signal
/CSINT I
RESET I Reset
Open
XCIN
Open
XCOUT
8 MHz
XIN I
XOUT O 8 MHz
GND GND
K3 I Not used
I Not used
K2
Not used
K1 I
Not used
K0 I
KD3 O Not used
KD2 O Not used
KD1 O Not used
O Not used
KD0
Not used
O
Not used
O
Not used
O
O Not used
O Not used
O Decoder reset
/DECRST
Servo driver on
DRV O
Focus gain high
FCSG O
Tray open control signal
TROP O
Tray close control signal
TRCL O
TBL + O Tray table revolution
TBL – O Tray table brake
Open
Servo LSI reset signal
/MNRST O
Open
O
Line mute
/MUTE O
/PON O Servo LSI power ON control
O Open
DMUTE O Digital mute
Microprocessor command store request
/MLD O
Serial 2 ^ µ-COM command
CMDSEL O
QSEL O
Serial 2 ^ Q-code reed
DOSEL O Decoder serial I/O out select
/TSPD O Tray table revolution speed control
VMUTE O Video mute
Not used
O
Not used
O
Not used
O
O Not used
O Not used
O Not used
Not used
O
Not used
O
Not used
O
O Not used
O Not used
Function
(GX-700VCD only)
(GX-700VCD only)
(MAIN CLOCK)
(MAIN CLOCK)
(GX-700VCD only)
(NC)
(implied clamper control)
(GX-700VCD only)
(H : Low speed)
(GX-700VCD only)