– 24 –
Pin No. Pin Name I/O Function
47 MUT O
Muting control signal output to the line muting circuit and power amplifier (IC701)
“H”: muting on
48 VOLCE O Chip enable signal output to the electrical volume (IC301)
49 NCO O Not used (open)
50 VOLCKO O Serial data transfer clock signal output to the electrical volume (IC301)
51 NCO O Not used (open)
52 VOLSO O Serial data output to the electrical volume (IC301)
53 to 56 NCO O Not used (open)
57 DIMMER O Dimmer control signal output terminal
58, 59 NCO O Not used (open)
60 RESET I
System reset signal input from the reset signal generator (IC551) and reset switch (S551)
“L” is input for several 100 msec after power on, then it changes to “H”
61 SIRCS I Sircs signal input from the remote control receiver (IC702)
62 BU-IN I
Battery detect signal input from the SONY bus interface (IC571) and battery check circuit
“H”: battery on
63 DOORSW I Door open/close detect input “L”: door close
64 ACCIN I Accessory detect signal input terminal “L”: accessory on
65 NOSESW I Detects the removal of the attaching and removing type front panel block “L”: attaching
66 TELMUT I Telephone muting signal input terminal At input of “L”, the signal is attenuated by –20 dB
67 KEYACK I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “H” (fixed at “H” in this set)
68 VDD — Power supply terminal (+5V)
69 OSCOUT O Main system clock output terminal (5 MHz)
70 OSCIN I Main system clock input terminal (5 MHz)
71 GND — Ground terminal
72 XT-OUT O Sub system clock output terminal (32.768 kHz)
73 XT-IN I Sub system clock input terminal (32.768 kHz)
74 AVDD — Power supply terminal (+5V) (for A/D converter)
75 AVREF0 I Reference voltage input terminal (+5V) (for A/D converter)
76 KEYIN0 I
77 KEYIN1 I
Key input terminal (A/D input) 6, DSPL, LIST, 10, 9, 8, 7, 6, 5 keys input
(LSW800, LSW711, LSW712 and LSW715 to LSW720)
78 KEYSEL0 I Setting terminal for the key function select (fixed at “L”)
79 KEYSEL1 I Setting terminal for the key function select (fixed at “H”)
80 DESTSEL I Destination setting terminal (fixed at “L”)
Key input terminal (A/D input)
OFF, SOURCE, – = 0 SEEK/AMS, MODE *, + + ) SEEK/AMS, SOUND,
SHIFT, 1, 2, 3, 4 keys input (LSW700 to LSW710)
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