34
HCD-EP505
6-18.
IC PIN FUNCTION DESCRIPTION
•
DISPLAY BOARD IC301
µ
PD780306GC-A68-8EU (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER)
Pin No.
Pin Name
I/O
Description
1 to 4
KEY2 to KEY5
I
Key input terminal (A/D input)
5
ANALYZER
I
Analyzer level detection signal input terminal (A/D input) Not used
6
STATION
I
Tuning detection signal input terminal
7
RDSDATA
I
Serial data input from the RDS decoder (Used for the AEP, UK models)
8
AVDD
—
Power supply terminal
9
AVREF
I
Reference voltage input terminal
10, 11
CDOUT1, CDOUT2
O
Not used
12
VSS
—
Ground terminal
13
TIME
O
LED drive signal output terminal
14
CDDATA
I/O
Two-way data bus with the CD block
15
CDRESET
O
Reset signal output to the CD block “L”: reset
16
REC-EN
O
REC bias control signal output terminal
17
INPINENA
O
Mega bass on/off selection signal output terminal “H”: mega bass on
18
REC-LED
O
LED drive signal output terminal
19
SOUNDENA
O
chip enable signal output foe the LC75392
20
PLLENA
O
PLL chip enable signal output to the FM/AM PLL “H” active
21
MUTE
O
Audio line muting on/off control signal output terminal “H”: muting on
22
POWER
O
System power on/off control signal output terminal “H”: power on
23 to 26
COM0 to COM3
O
Common drive signal output to the liquid crystal display
27
BIAS
O
Bias output for the liquid crystal display drive
28 to 30
VLC0 to VLC2
I
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
31
VSS
—
Ground terminal
32 to 61
SEG0 to SEG29
O
Segment drive signal output to the liquid crystal display
62
SEG30
I/O
Segment drive signal output to the liquid crystal display
AM frequency select switch input terminal
(AM frequency select switch: used for the except AEP, UK, chinese models)
63
SEG31
I/O
Segment drive signal output to the liquid crystal display
AM frequency select switch input terminal
(AM frequency select switch: used for the except AEP, UK, chinese models)
64
SEG32
Segment drive signal output to the liquid crystal display
65
SEG33
O
Segment drive signal output to the liquid crystal display Not used
66
SEL10
I
Head position detect switch input terminal “L”: reverse direction, “H”: forward direction
67
SEG35
O
Segment drive signal output to the liquid crystal display Not used
68
SEL12
I
Cassette tape detect switch input terminal “L”: no cassette, “H”: cassette in
69
SEG37
O
Segment drive signal output to the liquid crystal display Not used
70
SEL14
I
Rec-proof claw (forward direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
71
SEL15
I
Rec-proof claw (reverse direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
72
DATAIN
I
Serial data input from the FM/AM PLL
73
DATAOUT
O
Serial data output to the FM/AM PLL and LC75392
74
CLK
O
Serial data transfer clock signal output to the FM/AM PLL and LC75392
75
EEPROMDATA
I/O
Two-way data bus with the EEPROM
76
STEREO
I
FM stereo detection signal input terminal “L”: stereo
77
EEPROMCLK
O
Clock signal output to the EEPROM
Ver 1.1
Summary of Contents for HCD-EP505
Page 14: ...14 HCD EP505 MEMO ...
