Sony CMT-CNEZ3 Service Manual page 35

• IC PIN FUNCTION DESCRIPITION
PANEL BOARD IC1801 M30620FCPFP (SYSTEM CONTROLLER)
Pin No. Pin Name
1 to 4
-
STBYLED
5
POWER ON
6
7 SIRCS
8 VSS
9 CNVSS
10 XT1
11 XT2
12 RESET
CF1
13
14 VSS1
CF2
15
16 VDD1
17 -
18 RDS INT
19 CD SCOR
ACCUT
20
21 to 27
-
28 MP3CLK
29 MP3DI
30 MP3DO
31 CDDATA
32 SENS
33 CDCLK
34 -
35 LCDDATA
36 LCDCLK
37 to 40
-
41
XHOLD
42 to 45 -
46
XWR
47
RDSDATA
48
TUNED
49 STCE
50
DOUT
51
STCLK
52
-
53 STDIN
54
STEREO
55
STMUTE
56 BIAS
57 REC/PB
58
FDATA
I/O
-
Not used
O
LED drive signal output terminal for STANDBY indicate
O
Power relay drive signal output terminal
I Remote control signal input from the remote control receiver
- Ground terminal
-
Not used
I Sub system clock input terminal (32.768 kHz)
O Sub system clock output terminal (32.768 kHz)
Reset signal input from the reset switch "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I
Main system clock input terminal (10 MHz)
- Ground terminal
O
Main system clock output terminal (10 MHz)
- Power supply terminal (+3.3V)
-
Not used
RDS serial data transfer clock signal input from the tuner unit (NEZ5: AEP, East European,
I
Russian, UK models only)
I
Subcode sync (S0+S1) detection signal input from the CD DSP
I
Power down detection signal input terminal "L": power down, normally : "H"
-
Not used
O Serial data transfer clock signal output to the MP3 decoder
I Serial data input from the MP3 decoder
O Serial data output to the MP3 decoder
O Serial data output to the CD DSP
I Internal status (SENSE) signal input from the CD DSP
O Serial data transfer clock signal output to the CD DSP
-
Not used
O Serial data output to the liquid crystal display
O Serial data transfer clock signal output to the liquid crystal display
-
Not used
-
Not used
- Not used
-
Not used
I RDS serial data input from the tuner unit (NEZ5: AEP, East European, Russian, UK models only)
I Tuning detection signal input from the tuner unit
O Chip enable signal output to the tuner unit
O Serial data output to the tuner unit
O serial data transfer clock signal output to the tuner unit
-
Not used
I Serial data input from the tuner unit
I FM stereo detection signal input from the tuner unit
O Tuner muting on/off control signal output to the tuner unit
Recording bias on/off selection signal output terminal
O
"H": bias on, "L": bias off
O
Recording/playback selection signal output terminal "H": playback mode, "L": recording mode
O
Serial data output to the electrical volume
HCD-NEZ3/NEZ5
Description
"H": on
33