Kenwood CD-425M Service Manual page 4

CD-425M/4260M/4700M/DPF-J6030
3. Microprocessor pin description (X32, IC6) :UPD784217GF501
Pin No. Pin Name
1 A16(1M)
2 A17
3 SCL
4 SDA
5 RD
6 WR
7 CE
8 ASTB(CE)
9 VDD
10 RMUTE
11 RWRR
12 RWR
13 RTRN
14-21 L-D7-D0
22 VPP
23 +5VPWM
24 R-M-CW
25 R-M-CCW
26 MON
27 S3-SW
28 S2-SW
29 REG-ON
30 LOADM- (IN2)
31 LOADM+ (IN1)
32 LDC
33 SCLK
34 SENS
35 CLK
36 XLAT
37 VDD
38,39 X1,2
40 VSS
41 XT2
42 XT1
43 RESET
44 DATA
45 MUTEG(SYSTEM)
46 SCOR
47 POWER
48 REM
49 SBUSY
50 SDATA
51 AVDD
52 AVREF
53 PROTECT
54 UNLOAD-SW1
55 LOAD-SW1
56 S1-SW
57 DISC-SW2
58 DISC-SW
59 JOG2
60 JOG1
4
CIRCUIT DESCRIPTION
I/O
O No used.
O No connection.
O No connection.
I/O No connection.
O SRAM read strobe.
O SRAM write strobe
O Chip selector
O No connection.
- Power supply(+5V).
O Analog muting signal output.
O No connection.
I No connection.
I No connection.
O No connection.
- GND.
O Disc sensor ON/OFF. L:on
O Mechanism rotary motor(+). H:CCW
O Mechanism rotary motor(-). H:CW
O Control port of poor focus works.
I Mechanism address detector switch.
I Mechanism address detector switch.
O Power ON/OFF control.
O Loading motor(-) for main pickup.
O Loading motor(+) for main pickup.
O Laser on/off. L: Laser diode on.
O Sens serial data read clock.
I SENS signal input.
O Serial data clock.
CXD2587Q latch. H î L:latch
O
- Power supply(+5V).
- Main system clock(12.5MHz).
- GND.
- No connection.
I GND.
I System reset signal input.
O Serial data output.
O System muting control output.
I Sub code synchro detection.
I Power key input terminal.
I Remote control signal input.
I/O Serial busy signal I/O.
I/O Serial data signal I/O.
- Power supply(+5V).
- A/D reference power supply.
I Detection signal input of protection.
I Unloading switch for main pickup.
I Loading switch for main pickup.
I Mechanism address detector switch.
I Disc2 sensor input..
I Disc sensor.
I Encoder signal input.
I Encoder signal input.
Description