32
HCD-EP50
Pin No. Pin Name I/O Description
44
STROBE
O Strobe signal output to the 94HC4094 (U15) “H” active
45 INPINENA O Mega bass on/off selection signal output “H”: mega bass on
46 DOLBYENA O
Dolby NR on/off selection signal output terminal “L”: dolby off, “H”: dolby on
Not used (open)
47 CE O Chip enable signal output to the LC75392 (U6) “H” active
48 PLLENA O PLL chip enable signal output to the FM/AM PLL (U2) “H” active
49 MUTE O Audio line muting on/off control signal output “H”: muting on
50 POWER O System power on/off control signal output “H”: power on
51 to 54 COM0 to COM3 O Common drive signal output to the liquid crystal display (CN301)
55 BIAS O Bias output for the liquid crystal display drive
56 to 58 VLC0 to VLC2 I
Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive
voltage
59 VSS — Ground terminal
60 to 89 SEG0 to SEG29 O Segment drive signal output to the liquid crystal display (CN301)
90
SEG30 (SEL6) I/O
Segment drive signal output to the liquid crystal display (CN301)
AM frequency select switch (SW1) input terminal
(AM frequency select switch: used for the except AEP, UK, Chinese models)
91
SEG31 (SEL7) I/O
Segment drive signal output to the liquid crystal display (CN301)
AM frequency select switch (SW1) input terminal
(AM frequency select switch: used for the except AEP, UK, Chinese models)
92
SEG32 O Segment drive signal output to the liquid crystal display (CN301)
93
SEG33 O Segment drive signal output to the liquid crystal display Not used (open)
94
SEL10 I Head position detect switch input terminal “L”: reverse direction, “H”: forward direction
95
SEG35 O Segment drive signal output to the liquid crystal display Not used (open)
96
SEL12 I Cassette tape detect switch input terminal “L”: no cassette, “H”: cassette in
97
SEG37 O Segment drive signal output to the liquid crystal display Not used
98
SEL14 I
Rec-proof claw (forward direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
99
SEL15 I
Rec-proof claw (reverse direction) detection signal input from the protect detect switch
“L”: recording possible, “H”: protect
100 GENERALDIN I Serial data input from the FM/AM PLL (U2)
Ver 1.1
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