Read Sony CFD-E70L Service Manual online
39
CFD-E70L
6-19.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC801 CXP83624-035Q (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
CD-WRQ
I
Interruption detection signal input from the digital signal processor
2
RMC
I
Sircs remote control signal input terminal Not used
3
BUZZER
O
Buzzer sound signal output
4
N.C
O
Not used
5
CD-RES
O
System reset signal output to the digital signal processor “L”: reset
6
CD CE
O
Chip enable signal output to the digital signal processor
7
CD CL
O
Serial data transfer clock signal output to the digital signal processor
8
CD DO
I
Serial data input from the digital signal processor
9
CD DI
O
Serial data output to the digital signal processor
10
CD DRF
I
Focus on/off detection signal input from the digital signal processor
11
CD FSEQ
I
Synchronizing signal detection signal input from the digital signal processor
12
V-DATA
O
Serial data output to the electrical volume
13
V-CLOCK
O
Serial data transfer clock signal output to the electrical volume
14
N.C
O
Not used
15
MEGABASS
O
Megabass on/off control signal output “L”: megabass on
16
A-MUTE
O
Audio muting on/off control signal output to the electrical volume “H”: muting on
17
N.C
O
Not used
18
CD
O
Power on/off control signal output for the CD +5V power supply, and CD function control signal
output to the recording/playback equalizer amplifier “H”: CD power on
output to the recording/playback equalizer amplifier “H”: CD power on
19
P-CON
O
Power on/off control signal output to the power supply circuit, and power amplifier
“L”: standby mode, “H”: power on
“L”: standby mode, “H”: power on
20
CD DOOR
I
CD lid open/close detection switch input terminal “L”: CD lid is closed, “H”: CD lid is opened
21
REG CHK
I
Regulator check signal input of the AC input or battery input “H” active
22
N.C
O
Not used
23, 24
KEY-1, KEY-2
I
Key input terminal (A/D input)
25
JOG-B
I
Jog dial pulse input from the rotary encoder (B phase input)
26
JOG-A
I
Jog dial pulse input from the rotary encoder (A phase input)
27
SIMUKE CHECK
I
Destination setting terminal
28
INIT
O
Initial setting signal output
29
SHIFT CLK
O
Shift clock output of the main system clock (4.19 MHz) “H” active
30
RST
I
System reset signal input “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
31
EXTAL
I
Main system clock input terminal (4.19 MHz)
32
XTAL
O
Main system clock output terminal (4.19 MHz)
33
VSS
—
Ground terminal
34
VL
O
Liquid crystal display drive bias control signal output terminal
35 to 37
VLC3 to VLC1
—
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
38 to 41
COM0 to COM3
O
Common drive signal output to the liquid crystal display
42 to 61
SEG0 to SEG19
O
Segment drive signal output to the liquid crystal display
62 to 64
N.C
O
Not used
65
RADIO
O
Power on/off control signal output for the radio +6V power supply “H”: radio power on
66
TU-CE
O
PLL chip enable signal output to the FM/AM PLL
67
TAPE
O
Tape function control signal output to the recording/playback equalizer amplifier
“L”: radio or CD on, “H”: tape on
“L”: radio or CD on, “H”: tape on
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