Aiwa CX-LEM330 Service Manual page 32

CX-LEM330
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• IC Pin Function Description
• CONTROL BOARD IC801 LC876980B-52T4-E (SYSTEM CONTROLLER)
Pin No. Pin Name
1 MI-ACK
2 MP3-RST
3 MP3-REQ
4 MI-CS
5 MI-LP
6 MP3-STB
7 XTCN
8 X-RST
9 XLT
10 SCOR
11 RESET
12 I-XT1
13 O-XT2
14 VSS1
15 XIN
16 XOUT
17 VDD1
18 I-POWER_MONITOR
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L 13942296513
19 MODEL DETECT
20 KEY1
21 AREA
22 VOL_ENCODER
23 I_POWER_DOWN
24 TA-SW
25 RDS-DATA
26 RDS-CLK
27 KEY0
28 F-DATA
29 RMC_IN
30 NC VREF
31 to 42 G1 to G12
43 to 45 S1 to S3
46 VDD3
47 to 50 S4 to S7
51 VP
52 to 60 S8 to S16
61 to 65 NC
66 CD OPEN
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67 TA END SW
68 TA PLAY SW
69 NC
.
70 TU STEREO
71 TU TUNED
72 VDD4
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I/O
I Acknowledge signal input from the MP3 decoder
O Reset signal output to the MP3 decoder
I Request signal input from the MP3 decoder
O Chip select signal output to the MP3 decoder
O Serial data latch pulse output to the MP3 decoder
O Standby control signal output to the MP3 decoder
Oscillation circuit control signal output to the CD DSP
O
"H": auto oscillation, "L": oscillation off
O Reset signal output to the CD DSP
O Serial data latch pulse output to the CD DSP
I Subcode sync (S0+S1) detection signal input from the CD DSP
Reset signal input from the reset switch
I
after the power supply rises, "L" is input, then it changes to "H"
I Sub system clock input terminal (32.768 kHz)
O Sub system clock output terminal (32.768 kHz)
— Ground terminal
I Main system clock input terminal (10 MHz)
O Main system clock output terminal (10 MHz)
— Power supply terminal (+3.2V)
I Power monitor input terminal
I Model destination setting terminal
I Front panel key input terminal (A/D input)
I Model destination setting terminal
I Dial pulse input of the rotary encoder (for VOLUME control)
I Power down detection signal input terminal
Cassette in/out detect switch signal input from the tape mechanism deck
I
"L": cassette in
I RDS serial data input from the FM/AM tuner unit
I RDS serial data transfer clock signal input from the FM/AM tuner unit
I Front panel key input terminal (A/D input)
O Serial data output to the electrical volume
I Remote control signal input from the remote control receiver
— Not used
O Grid drive signal output to the fluorescent indicator tube
O Segment drive signal output to the fluorescent indicator tube
— Power supply terminal (+3.1V)
O Segment drive signal output to the fluorescent indicator tube
— Power supply terminal (–29V)
O Segment drive signal output to the fluorescent indicator tube
— Not used
I CD lid open/close detection switch input terminal
I END switch signal input from the tape mechanism deck
I PLAY switch signal input from the tape mechanism deck
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— Not used
i
I FM stereo detection signal input from the FM/AM tuner unit
I Tuning detection signal input from the FM/AM tuner unit
— Power supply terminal (+3.1V)
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2 9
8
Description
"L": reset For several hundreds msec.
Q Q
3 6 7 1 3 1 5
"L": power down, normally : "H"
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9 4 2 8
0 5 8 2 9 9 4 2 8
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9 9
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