Ic Pin Function Description - Sony SS-CM70 Service Manual

HCD-M70

6-18. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC801 CXP83124A-053Q (SYSTEM CONTROLLER)
Pin No. Pin Name
1
SENSOR
2
RDS-IN
3 SIRCS
4
NC
5
TU-DATA
6 T-MODE
7
REG-CON
8 C-CLK/TU-CLK
9
SPK PROTECT
10
CD-DATA
11
C-SQCK
C-SQSO/
12
RDS-DATA
13 HOLD
14
ALC
15
CD-ON
16 REC-MUTE
17
TUNED
18
C-SENSE
19 C-LATCH
20
L-MUTE
21 REC/PB
22 AMP-MUTE
23
TU-COUNT
24 H/P CHK
25
TU-ON
26
DSG
27
CD-SYNC
28
SCK
29
SOL-CON
30
MOT-CON
31
TU-CE
32
TC-SW
33
TRAY-SW
34 to 36
KEY3 to KEY1
37
SIMUKE
34
I/O
I
Tape end detect switch input terminal "H" input when the tape end detected
Serial data transfer clock signal input from the RDS decoder
I
(RDS decoder is used for the AEP and UK models)
I Sircs remote control signal input
— Not used
O
Serial data output to the tuner unit
I
Head position detect switch input terminal "L": forward direction, "H": reverse direction
O
Main system power supply on/off control signal output "H": power on
Serial data transfer clock signal output to the digital signal processor (at CD function)
O
Serial data transfer clock signal output to the tuner unit (at tuner function)
I Protect on/off control signal input from the speaker protect circuit "L": protect on
O
Serial data output to the digital signal processor
O Subcode Q data reading clock signal output to the digital signal processor
Subcode Q data input from the digital signal processor (at CD function)
I Serial data input from the RDS decoder (at tuner function)
(RDS decoder is used for the AEP and UK models)
O Automatic power control hold signal output to the RF amplifier
Automatic limiter control signal output to the recording/playback equalizer amplifier
O
"H": limiter on
Power supply on/off control signal output for the CD section (+5V)
O
LED drive signal output of the CD indicator "H": CD power on (LED on)
Recording muting on/off control signal output to the recording/playback equalizer amplifier
O
"L": muting on
I Automatic limiter control signal input from the tuner unit
I Internal status detection monitor input from the digital signal processor
O Serial data latch pulse signal output to the digital signal processor
Line muting on/off control signal output to the recording/playback equalizer amplifier
O
"H": muting on
Recording/playback selection signal output to the tape section
O
"L": playback mode, "H": recording mode
O
Muting on/off control signal output to the power amplifier
I
PLL serial data input from the tuner unit
Headphone jack connection detection signal input terminal
I
"L": no connected, "H": headphone connected
Power supply on/off control signal output for the tuner section (+9.5V)
O
LED drive signal output of the TUNER indicator "H": tuner power on (LED on)
O LED drive signal output of the DSG (Dynamic Sound Generator) indicator "H": LED on
O
LED drive signal output of the CD SYNCHRO indicator "H": LED on
O Serial data transfer clock signal output to the electrical volume
O Trigger plunger on/off control signal output "H": plunger on
O
Capstan/reel motor on/off control signal output "H": motor on
O
Chip enable signal output to the tuner unit
I Half detect (side A and B) switch and cassette in detect switch input terminal (A/D input)
Disc tray open/close detect switch input terminal (A/D input)
I
"L": disc tray open, "H": disc tray close
I Key input terminal (A/D input)
I Destination setting terminal (A/D input)
Description
"H": muting on