Port No. Port Name I/O Function
1 VDD - POWER SUPPLY(+5V)
2 -20dB ATT O -20dB ATTENUATION
3 NO USE/DSA STB - GND
4 T BIAS O DECK BIAS CONTROL
5 T T1/T2 O DECK T1/T2 CHANGE OVER
6 REC/PLAY O DECK RECORDING/PLAYBACK CHANGE OVER
7 RES OUT O CD DSP REQUEST
8 DRF I CDRF LEVEL DETECTION
9 WRQ I CD DSP WRITE REQUEST
10 REQUEST I RESET SIGNAL INPUT
11 X2 O MAIN CLOCK OUTPUT
12 X1 I MAIN CLOCK INPUT
13 VPP/IC - GND
14 XT2 - OPEN
15 SPN - OPEN
16 VDD - POWER SUPPLY(+5V)
17 CD CLK O CD DSP CLOCK
18 CD DI O CD DSP COMMAND
19 CD DO I CD DSP CODE Q INPUT
20 CD CE O CD DSP CE OUTPUT
21 CE O CHIP ENABLE OUTPUT
22 CLK O CLOCK OUTPUT
23 DI O DATA OUTPUT
24 DO I DATA INPUT
25 AVSS - GND
26 O/C SW/DSA DATA I CD OPEN CLOSE SWITCH INPUT
27
NO USE/DSA ACK
/TUN SM
I TUNER SIGNAL METER INPUT
28 SPEANA 2 I SPEANA DATA INPUT(16kHz)
29 SPEANA 1 I SPEANA DATA INPUT(1kHz)
30 SPEANA 0 I SPEANA DATA INPUT(63kHz)
31~33 KEY2~KEY0 I KEY INPUT
34 AVDD - ANALOG POWER SUPPLY
35 AVREF - ANALOG REFERENCE VOLTAGE
36 P IN I POWER FAILURE DETECTION
37,38 JOG1,0 I JOG VOLUME INPUT 1, 0
39 REMOCON I REMOTE CONTROL SIGNAL INPUT
40 VSS - GND
41 SMUTE O SYSTEM MUTE CONTROL
42 T SOL B O DECK2 SOLENOID CONTROL
43 T SOL A O DECK1 SOLENOID CONTROL
44 T MOTOR O DECK MOTOR CONTROL
45 TIMER LED O TIMER LED CONTROL
46 VDD - POWER SUPPLY(+5V)
47 AC RLY CONT. O AC RELAY CONTROL
48 SP RLY O SPEAKER OUTPUT RELAY CONTROL
49 SP DET I SPEAKER OUTPUT DETECTION
50 T1 RUN I DECK1 REEL SENSOR DETECTION PORT
51 T2 RUN I DECK2 REEL SENSOR DETECTION PORT
52 CD CLAMP SW I CD CHANGER CLAMP SWITCH INPUT
53 PLAY SW A I DECK PLAY SWITCH A INPUT
54 PLAY SW B I DECK PLAY SWITCH B INPUT
55 FPA I DECK FORWARD RECORDING SWITCH INPUT
1. Port Description of Microprocessor
RXD-655/755
10
CIRCUIT DESCRIPTION
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