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FUNCTIONS OF IC 305 TERMINALS
P i n
No
Pin Name
Input
Outpul
Function
I
Vno
. B+ power supply
2
PO\ryER
.oN
Input
o Achieves back-up state of the internal memory and flip-flop at low level.
o Achieves operation state at high level.
3
I!-il.{D IN
lnput
o When low level is maintained in band division state (F/A IN: low level), enables alternate
designation of the band with AM input.
o When the terminal M-IND IN and CHI - CH7 are high level at band division state (F/A IN:
low level), enables alternate designation of the band with VT UPiDOWN terminal.
4
MEMO IN
Input
. Input terminal of band memory.
o When at low, and terminals eHl - CH7 trotd at low for more than 2Omsec, enables
memorization of the band being received (BAND I or BAND II).
o Employed by connecting in parallel with the terrninal MEMO of IC 303 (LC'1207).
5
w
uP/DOWN
Input
. Input terminal which designates the band (BAND I/BAND II) alternately by receiving the
leading or trailing differentiation
signal of automatic search sweep voltage (UP SEARCH).
6
F/A IN
Input
r Employed by connecting to the terminal F/A OUT of IC 303 (LC72O7).
. At low level, achieves the band division state.
BAND-(ii)
Output
o At low level, designates the band II.
r When the terminal (F/A IN is at high level, achieves the band division stâte (low level or
high level).
8
BAND(I)
Output
. At low level, designates the band I-
. When the terminal AM is low, achieves the band division state (low or high).
When the terminal F/A IN is high level, the output of this terminal becomes in high level.
9
AM
Input
r When the terminal Ni:IND-TN is low at band division state (F/A IN: low level), becomes
the input which designates the toggle operation of bands (BAND I/BAND II)
(chatter time: 6 - 12 msec)
. At low level, either the terminalEÂNDI-orBA-ND-lf goes simultaneously low.
o Not used in this model.
1 0
CLK
Input
o Employed by connecting in paraÏel with the terminal CRI or IC303 (LC7207).
o Input for LC7000 system clock.
1 1
l ,
t'l
cHl-CH7
Input
o Employed by connecting in parallel with terminals CHI - CH7 of IC 303 (at low level,
channel band designation is performed)
. Input terminal of band designation (BAND I/BAND II) of each channel (CH1 - CH7).
o Priority during simultaneous designations.
1 8
V s s
o B- power supply
t 9
RST
Input
. When this terminal goes high, internal memory and flip-flop are reset.
20
MUTE
Output
. Outputs the muting signal (high level) when depressing simultaneously the channel switch
(cHl - cH7).
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