JVC NX-MD1R Service Manual page 66

NX-MD1R/NX-MD1
UPD784217AGC139 (IC500) : MD control micon
1.Terminal layout
DRIVER_ON
2.Pin function
Pin
I/O
Symbol
No.
1
MPROT
2
SSTOP
3 MREF
4 ~8 NC
9 Vdd
10 X2
11
X1
12
Vss
13
XT2
14 XT1
15 RESET
16 MHOM
17 SQSY
18
DQSY
19
XINT
20 CD_EMP
21 CD_CBIT
22 CD_TNO
23 Avdd
24
AVref0
25 ~28
MT0 ~ MT3
29
MODSEL
30 UART
31 DOUT_SEL
32 DOUT_OFF
1-66
NC 76
NC 77
78
NC
79
80
XTSL
81
Vdd
82
TX
NC 83
RECP 84
NC 85
NC 86
87
XRST
88
SENS
89
XLAT
90
MNT3
91
MNT2
MNT1 92
MNT0 93
Vpp 94
95
CAM4
96
CAM3
97
CAM1
98
CAM2
99
NC
100
NC
I Write protect switch input
I
SLED rest posistion detect input
I
Disc hole detect switch(Reflectivity detection input)
-
Not use
-
Power supply
-
Oscillation terminal (12MHz)
- Oscillation terminal (12MHz)
- Connect to GND
-
Not use
-
Connect to GND
I
Reset input
O
Magnetic head driver ON/OFF L:REC
I Sub code Q/A dip syne
I "Digtal in of U-bit ,S-code Q sink input terminal"
I
Interrupter requier
I
CD emphasis input
-
Power supply (Analog)
- Connect to GND
- Connect to GND
I
Mode select input
I
External commication style select terminal H:UART L:Four line style
I
Digital out select terminal H:DIN throw output L:FS convert output
I
Digital out select terminal H:OFF L:OFF
4XREC
50
SVIB
49
DINUNL
48
47 MONICLK
46 MONIDATA
45 NC
44 NC
MONILT
43
SCLK
42
SWDT
41
SRDT
40
39 COMCLK
38 COMOUT
37 COMIN
36 AVref1
35 LOAD
EJECT
34
AVss
33
DOUT_OFF
32
DOUT_SEL
31
30 UART
29 MODSEL
28 MT3
27 MT2
26 MT1
Function