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6-15. IC PIN FUNCTION DESCRIPTION
• DISPLAY BOARD IC301 µPD78064GF-187-3BA (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER)
Pin No.
Pin Name
1
GENERALDOUT
2
GENERALCLK
3
I2CDATA
4
STEREO
5
I2CCLK
6
IC
7
X2
8
X1
9
VDD
10
XT1
11
XT2
12
RESET
13
REMOTE
14
PWRFAIL
15
RDSCLK
16
CDCLK
17
SENSORB
TE
L 13942296513
18
SENSORA
19
CD DOOR SW
CDIN2 to CDIN5
20 to 23
24
AMS
25
ENCODERA
26
ENCODERB
27
AVSS
28
KEY1
29
KEY2
30
KEY3
31
KEY4
32
KEY5
33
ANALYZER
34
TUNED
35
RDSDATA
36
AVDD
37
AVREF
www
38, 39
CDOUT1, CDOUT2
40
VSS
.
41
CDOUT3
42
CDDATA
43
CDRESET
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I/O
O
Serial data output to the FM/AM PLL (U2), LC75392 (U6) and 94HC4094 (U15)
Serial data transfer clock signal output to the FM/AM PLL (U2), LC75392 (U6) and 94HC4094
O
(U15)
I/O
Two-way data bus with the EEPROM (IC302)
I
FM stereo detection signal input from the LA1837 (U1) "L": stereo
O
Clock signal output to the EEPROM (IC302)
—
Internal connection terminal (connected to ground)
O
Main system clock output terminal (4.194304 MHz)
I
Main system clock input terminal (4.194304 MHz)
—
Power supply terminal
I
Sub system clock input terminal (32.768 kHz) Not used (open)
O
Sub system clock output terminal (32.768 kHz) Not used (open)
System reset signal input from the reset signal generator (IC304) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I
Remote control signal input from the remote control receiver (X302)
I
Power failure detection signal input terminal "L": power failure, "H": power on
I
Serial data transfer clock signal input from the RDS decoder (IC305) Not used
I
Serial data transfer clock signal input from the CD block
I
Tape sensor input terminal Not used (open)
I
Tape play/rec detect sensor input terminal "L" input when the tape play/rec detect
I
CD lid open/close detect switch (SW300) input terminal "L": CD lid is closed
I
Not used (open)
Whether a music is present or not from BA335 (U14) is detected at auto music sensor
I
"L": music is not present, "H": music is present
I
Jog dial pulse input from the rotary encoder (X303 VOLUME) (A phase input)
I
Jog dial pulse input from the rotary encoder (X303 VOLUME) (B phase input)
—
Ground terminal
Key input terminal (A/D input) SW301 to SW305 (I/1, TUNER, TAPE, CD, PLAY MODE
I
RDS/DIR) keys input (RDS: used for the AEP, UK models)
Key input terminal (A/D input)
I
SW306 to SW309 (x, X, Y, TUNER MEM ENTER) keys input
I
Key input terminal (A/D input) SW310 to SW312 (PRESET +/–, DISPLAY) keys input
Key input terminal (A/D input)
I
SW313 to SW315 (TUNING – . m, TUNING + M >, MUSIC MENU) keys input
I
Key input terminal (A/D input) SW316, SW317 (MEGA BASS, z) keys input
I
Analyzer level detection signal input terminal (A/D input) Not used (open)
I
Tuning detection signal input from the LA1837 (U1) (A/D input) "L": tuned
I
Serial data input from the RDS decoder (IC305) Not used
—
Power supply terminal
I
Reference voltage input terminal
O
Not used (open)
x
ao
u163
y
—
Ground terminal
i
O
Not used (open)
I/O
Two-way data bus with the CD block
O
Reset signal output to the CD block "L": reset
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2 9
8
Description
Q Q
3
6 7
1 3
1 5
co
.
HCD-EP50LIV
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9
31
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