Kenwood KDC-C521FM Service Manual page 7

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MICROCOMPUTER'S TERMINAL DESCRIPTION
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Pin No. Pin Name
40 DATAH
41 DATAC
42 HCLK
43 RECQC
44 CHMUTE
45 TSI
46 TSO
47 TSCK
48~55 A0~A7
56~63 D0~D7
64~68 A8~A12
69~71 A13~A15
72 VSS
73 A16
74 A17
75 RAMOK
76 ELVADJ
77 RD
TE
L 13942296513
78 WR
79 WAIT
80 ASTB
81 VDD
82 PUSEL
83 REQH
84 SPLO+
85 SPLO-
86 ELV+
87 ELV-
88 SIM1
89 SEARCH
90 TEST1
91 TEST2
92 8/7V
93 EEPWR
94 TEST/VPP
95 SRVSEL
96 SLNSA
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97 SDA
98 SCL
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99 PON
100 ARMSW
I/O Description
I Data input from H/U
O Data output from the changer
I/O Communication clock input/output with H/U
O Communication request to H/U
O Audio mute request to H/U
I Text data input from servo IC
O Text data output to servo IC
O Text data clock to servo IC
O Address setting terminal for S RAM
I/O Data input/output terminal with S RAM
O Address setting terminal for S RAM
O Chip enable setting terminal for S RAM
- Ground connection terminal
O Chip enable setting terminal for S RAM
O Chip enable setting terminal for S RAM
O Pickup check judging terminal for production
I Mechanism deck ascent/descent position terminal
O Read-out to S RAM control output
O Write to S RAM control output
I Waiting time insertion input when accessing S RAM
O Chip selection to S RAM
- Positive power supply connection terminal
I Pickup type select terminal
I Communication request from H/U
O Spindle/Loading control terminal
O Spindle/Loading control terminal
O Mechanism deck ascent/descent terminal
O Mechanism deck ascent/descent terminal
I Destination input 1
O Search mode output
I Test mode terminal 1 for test mode
I Test mode terminal 2 for test mode
O Motor driver IC power voltage control output
I EEPROM write mode terminal for production
I Flash ROM program mode terminal
I Servo active mode terminal (no mechanism movement)
I Sled non-sensitive area ON/OFF terminal
I/O Data input/output with EEPROM
x ao u163
y
O Clock output to EEPROM
i
O PON output
I Arm switch input
KDC-C471FM/C521FM
2 9
8
"Lo" : Communication requested
"Lo" : Audio mute requested
Not used (pull down to GND lines)
Connected to GND lines
Not used (pull down to GND lines)
Not used (N.C.)
Not used (pull up to D 5V lines)
Q Q
3 6 7 1 3 1 5
Not used (pull down to GND lines)
Not used (N.C.)
Connected to D 5V lines
Pull up to D 5V lines
"Lo" : Communication requested
"Lo" : adapted for CD-TEXT, "Hi" : not adapted for CD-TEXT
Not used (N.C.)
Not used (pull down to GND lines)
Not used (pull down to GND lines)
"Hi" : 7V, "Lo" : 8.5V
Not used (pull down to GND lines)
Not used (connected to GND lines)
Not used (pull down to GND lines)
Not used (pull down to GND lines)
co
.
"Lo" : AVR & LPS POWER ON
"Hi" : Arm switch ON
9 4 2 8
Processing Operation
0 5 8 2 9 9 4 2 8
m
9 9
9 9
7