Sony STR-S5L - Page 8

Pin
No.
Pin Name
Input/Output
Function
20 M-IND
Output
Signal output which
indicates
manual
station selection
state.
N
channel
open drain
output form
(at
low
during manual station
selection).
Not
used
in this model.'
2l
Vnl
-
LSI
power
supply; During operation:
+9V;
Back-up:
+5V
22
MUTE
Outpul
-
Output
terminal for control
signal which eliminates
undesirable
noise during
station
selection.
-
At high during
search,
preset
station selection
and band
switching.
ZJ F-Tune
Output
Fine
tuning
output
terminal.
Generates
voltage
for
fine
tuning
by connecting
with
low
pass
filter.
Adjusts
voltage
at mixing
resistor
and loads
it
to ladder
output
voltage
(50%
duty
signal except
during
fine
tuning:
T
=
1.5 msec).
Outputs
8 stage
pulse
modulation
signal
during fîne
tuning.
24 Vref
-
Reference
voltage
(+8V)
for
D/A
converter,
comparator.
25-34 Bl-Bl0
Output
Output for
l0 bit-
UP/DOWN
counter
(including
ladder.buffer).
Performs
D/A
conversion
bv connectins
ladder resistor.
3s
Vss
-
GND terminal
of LSI
36-42
CHl_CH7
Input/Output
Channel
input
terminal.
output
terminal for
station reception
indication.
(including
N channel
open
drain form
LED
driver.)
At low,
memorized
station
is
selected.
when
MEMô
terminal
is
at low.
and any one
of
cFI
t
-cH5
goes
low,
the station
being
received
is memorized.
Hold
at low for
station
selection
or memory for
more
than 20 msec.
Note: A
ex:
terminal with
bar over its name
operates when
OV is
apptied.
Fil,_
-8-