Pin Description Of Main Microprocessor - Kenwood RXD-M31MD Service Manual

4-3 Pin description of main microprocessor

Pin No. Name I/O
1 CE O SYSTEM IC(LC75396)/PLL IC(LC72131)CE
2 PLL DO I PLL data input.
3 SD I Tuner SD detector input.
4 STEREO I Tuner stereo detetor input.
5 EMPHASIS O No used.
6 RDS DATA I RDS data input.(E/T type only)
7 CE I AC off detector input.
8 BYTE I Ground.
9 CNVSS I Ground.
10 XCIN I Timer clock(32.768kHz).
11 XCOUT O Timer clock(32.768kHz).
12 RESET I U-com reset signal input.
13 XOUT O Main clock.
14 VSS - Ground.
15 XIN I Main clock.
16 VCC - Power supply(+5.0V)
17 NMI I Power supply(+5.0V)
18 REMOCON I Remocon signal input.
19 RDX CLK I RDS clock input.(E/Ttype only)
20 SCOR I Sub code synchro signal input.
21 CD DC OFF O Power supply control for CD DSP.
22 SCLK O CD sense data read out clock.
23 SENSE I CD sense input.
24 CD CLK O CD DSP clock.
25 XLAT O CD DSP latch output.
26 CD DATA O CD DSP data output.
27 CD RST O CD DSP reset signal output.
28 SQCK O CD sub code clock.
29 SQSO I Input of CD sub code.
30 NC O No used.
31 FL DATA O Data output of FL driver.
32 NC O No used.
33 FL CLK O Clock output of FL driver.
34 CD ZD - No used.
35 UART1 O Transmission data output to MD(UART).
36 UART2 I Data input from MD(UART).
37 LCD O CD laser output control.
38 NC O No used.
39 MD RST O MD reset signal output.
40 CD MON O ON/OFF control output of disc monitor.
41 NC O No used.
42 DM SHORT O Same as CD power signal.
43 DOOR SW I Input port of CD door switch.
44,45 NC O No used.
46 MODEL I Input port of model discrimination.
47 DOLBY I No used.
48~50 CODE2~4 I Discrimination of tuner destination.
51 FL RST O Reset signal output of FL driver.
Description
H: no tuned
H: mono
H: AC on
H: normal
H: off
H: normal
H: off
H: normal
H: on
H: off
H: open
Pin No. Name I/O
52 PWX33 O
53 ENC1 I
54 ENC2 I
L: tuned
55 LED5 O
L: stereo
56 LED4 O
57 LED3 O
58 LED2 O
L: AC off
59 LED1 O
60 LED0 O
61 FL CE O
62 VCC -
63 NC O
L: reset
64 VSS -
65 A/B-2 O
66 A/B-1 O
67 CPM O
68 SOL O
69 REC F SW I
70 REC R SW I
L: on
71 PACK SW I
72 Cro2 SW -
73 PLAY SW I
74 B1/2 -
75 A120/70 -
76 BIAS O
L: reset
77 NOR -
78 REC/PLAY -
79 NR/ON -
80 S.CL O
81 PRT MD I
82 FAN H/L -
83 FAN ON/OFF -
84 A MUTE O
85 CD A MUTE O
86 TU.MT O
L: on
87 PWR07 O
88 PRT07 I
L: reset
89~91 KEY1~KEY3 I
L: off
92,93 A/DP1,A/DP2 -
94 TA.MT O
L: on
95 RDS SLEVEL I
L: close
96 AVSS -
97 PHOTO I
98 VREF -
99 AVCC -
100 S.DI O
Description
Control port of MD CE.
Rotary encoder input(vol.A).
Rotary encoder input(vol.B).
Control port of LED(MD). H: on
Control port of LED(CD). H: on
Control port of LED(standby,RED). H: off
Control port of LED(standby,GRN). H: off
Control port of LED(FWD). H: on
Control port of LED(RVS). H: on
Output port of CE(FLdriver).
Power supply.
No used.
Ground.
65 66
Deck activity choise mode.
H
L
Deck activity choise mode.
L
Deck motor control. H: on
Deck solenoid control. H: on
Deck FWD REC switch input. H: off
Deck RVS REV switch input. H: off
Deck pack switch input. H: off
No used.
Deck play switch input. H: off
No used.
No used.
Deck bias control. H: on
No used.
No used.
No used.
Clock output to system IC/PLL IC.
MD protection. H: protection on
No used.
No used.
Audio muting control. H: off
CD analog muting control. H: on
Tuner muting control. H: on
Power relay control. H: on
Detection port of protection. H: protection on
Key A/D input(1~3).
No used.
Muting control of DECK. H: on
RDS S-level input.(E/T type only)
Ground.
Deck reel detector input.
Reference voltage.(no back up)
Power supply.(back up)
Data output to system IC/PLL IC.
L: off
L: off
L: on
L: on
L: off
L: off
H REC
H REC PAUSE,ARM
L PLAY
L: off
L: off
L: on
L: on
L: on
L: on
L: off
L: on
L: off
L: off
L: off
L: off