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CD-4900M/DPF-J9030
1-2 Microprocessor pin description (X32, IC8): UPD784217GF502
Pin No.
Pin Name
1
A2
2
NC
3
S3-SW
4
S2-SW
5
RD
6
WR
7
S1-SW
8
ASTB
9
VDD
10
+5VPUL
11
RTRN
12
RWR
13
RWRR
14~21
L-D7-D0
22
TEST
23
DISC-SW
24
ROTARY-CW
25
ROTRAY-CCW
26
LOADM+1
27
LOADM-1
28
LOAD-SW1
29
UNLOAD-SW1
30
CS
31
MON
32
SCLK
33
SENS
34
CLOCK
35
XLAT
36
DATA
37
VDD
38,39
X1,2
40
VSS
41
XT2
42
XT1
43
RESET
44
SCOR
45
MUTEG
46
STB2
47
ICRESET
48
SYSM
49
SDATA
50
SBUSY
51
AVDD
52
AVREF
53
A/D0
54
8/16
55
JOG2
4
CIRCUIT DESCRIPTION
I/O
O
Address bus of SRAM.
-
No connection.
I
Mechanism address detector switch.
I
Mechanism address detector switch.
O
SRAM read strobe.
O
SRAM write strobe
I
Mechanism address detector switch.
O
No connection.
-
Power supply(+5V).
O
Disc sensor ON/OFF. L:on
I
TX permission data to remote control microprocessor.
I
Reading data of remote control microprocessor.
O
TX request data to remote control microprocessor.
O
Data output to remote control microprocessor.
-
GND.
I
Disc sensor.
O
Mechanism rotary motor(+). H:CCW
O
Mechanism rotary motor(-). H:CW
O
Loading motor(+) for main pickup.
O
Loading motor(-) for main pickup.
I
Loading switch for main pickup.
I
Unloading switch for main pickup.
O
Chip selector
O
Control port of poor focus works.
O
Sens serial data read clock.
I
SENS signal input.
O
Serial data clock.
î L:latch
O
CXD2587Q latch. H
O
Serial data output.
-
Power supply(+5V).
-
Main system clock(12.5MHz).
-
GND.
-
No connection.
I
GND.
I
System reset signal input.
I
Sub code synchro detection.
O
Muting control output. H:muting on.
O
Strobe signal output to dot driver.
O
IC reset.
O
Analog muting. L: Muting on.
I/O
Serial data signal I/O.
I/O
Serial busy signal I/O.
-
Power supply(+5V).
-
A/D reference power supply.
I
Model discrimination.
I
8/16 bit selector. H:16bit.
I
Encoder signal A input.
Description
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