Sony HCD-VP1 - Page 36

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)