Kenwood KDCX 579 Service Manual

Page 7

KDC-X579

MICROCOMPUTERS TERMINAL DESCRIPTION

Pin No. Pin Name l/O Application Truth Processing Operation Description
valuetable
58 (SVR) 0 POWER IC SVR control terminal Momentary power down : H
59 P-MUTE 0 POWER IC MUTE output terminal During POWER OFF :L, During ALL OFF : L, When TEL MUTE :L
60 P-STBY 0 POWER IC STBY output terminal When POWER IC ON : H, OFF : L
61 Not used 0
When momentary power down : L,
62 PRE MUTE R O Rch PRE MUTE output
M-MUTE R :L (during CD), 2 zone : H fixed
When momentary power down : L,
63 PRE MUTE L O Lch PRE MUTE output
M-MUTE L : L (during CD), 2 zone : H fixed
64 AFS O Constant switching terminal at noise DET During FM seek and AF search :L, During reception :H
65 O-DATA l/O Not used
66 O-CLK l/O Not used
67 O-CE l/O Not used
Normally : L,
68 LX7RST 0 Reset output to external devices
System RST return, than after 400msec or more :H then L
69 LX7CON 0 Control output to external devices ON : H, OFF : L
70 AVCONT O AD reference voltage control output While in operation : H
71 AVDD -
72 AVSS -
73 AVREF - AD reference voltage control input Connect to 70 pin
TEL MUTE :1V or lower,
74 PHONE | PHONE DET terminal
NAVI MUTE :2.5V or higher
75 TYPE3 | Destination switching terminal
76~81 Not used I
82 S-METER | S-meter DET terminal
83 NOISE | FM noise DET terminal
84 IFC-OUT | F/E IFC OUT input terminal
85 LX7MUTE | MUTE request from external devices H : MUTE ON, L : MUTE OFF
86 LX7REQiM 0 Request output to external devices Request DET : L
87 Not used 0 Non RDS destination Output L fixed
88 LX7RE078 | Request input from external devices Request DET : L
89 KEY-REQ | Communication request from LCD driver L: KEY input
90 L08 SW | Loading start SW DET terminal Loading start : L
12cm DISC EJECT position DET SW terminal
91 12EJE SW | 12cm DISC : L
12 or 8cm DET
92 EJECT | EJECT DET terminal L : KEY input
93 Not used 0 Output L fixed
94 LX7DATA78 | DATA input terminal from external devices
95 LX7DATA7M 0 DATA output terminal for external devices Last retention
96 LX70LK l/O CLK input/output terminal with external devices