36
Pin No.
Pin Name
I/O
Description
38
RESET
I
System reset signal input from the reset signal generator (IC803) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
39
EXTAL1
I
Main system clock input terminal (4.19 MHz)
40
XTAL1
O
Main system clock output terminal (4.19 MHz)
41
VSS
—
Ground terminal
42
XTAL2
O
Sub system clock output terminal (500 kHz) Not used (open)
43
EXTAL2
I
Sub system clock input terminal (500 kHz) Not used (fixed at “L”)
44
AVREF
I
Reference voltage (+5V) input terminal (for A/D conversion)
45
AVSS
—
Ground terminal (for A/D conversion)
46
VL
O
Liquid crystal display bias on/off control signal output terminal
47 to 49
VLC3 to VLC1
—
Power supply terminal for the liquid crystal display bias
50 to 53
COM0 to COM3
O
Common drive signal output to the liquid crystal display (LCD801)
54 to 85
SEG0 to SEG31
O
Segment drive signal output to the liquid crystal display (LCD801)
86
REC-BIAS
O
Recording bias on/off selection signal output to the HA12203NT (IC352)
“L”: bias on, “H”: bias off
87
REC-MUTE
O
Recording muting on/off selection signal output to the HA12203NT (IC352)
“L”: muting on, “H”: muting off
88
DOLBY
O
Dolby NR on/off selection signal output to the HA12203NT (IC352)
“L”: dolby on, “H”: dolby off
89
VDD
—
Power supply terminal (+5V)
90
NC
—
Connected to power supply (+5V)
91
VSS
—
Ground terminal
92
TX
O
Sub system clock output terminal (32.768 kHz)
93
TEX
I
Sub system clock input terminal (32.768 kHz)
94
CD-ON
O
LED drive signal output of the CD indicator (D852) “H”: CD power on (LED on)
95
REC/PB
O
Recording/playback selection signal output to the BA3126N (IC350) and HA12203NT (IC352)
“L”: playback mode, “H”: recording mode
96
L-MUTE
O
Line muting on/off selection signal output to the HA12203NT (IC352)
“L”: muting on, “H”: muting off
97
LINE OUT-MUTE
O
Muting on/off control signal output terminal “H”: muting on
98
TC-ON
O
Power supply on/off control signal output of the cassette holder back light
LED drive signal output of the TAPE indicator (D854) “H”: back light on (LED on)
99
WP
I
Wakeup control signal input terminal
100
S-ACK
I
Subcode sync (S0+S1) detection signal input from the VCD block (at CD function)
Summary of Contents for HCD-VP1
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