Sony SRF-M100 - Section 3 Pin Description; Power out

SECTION 3
PIN DESCRIPTION
Pin description of 4 PD1724GB-555-1A7 (IC101)
LCD drive segment signal output.
Pin
number
-[2
pe >)
ea
—
Mm __ ON
APN owo re
i bdo
LCD drive common signal output
— be
—_ al
VSS3
CAP2
CAP1
CGP BUZZER
16
Terminals
used
for
connecting
a
capacitor
of
a
doubler
circuit
which
supplies
LCD
17
drive
voltage.
18
VSS2
Audio
mute
output
signal.
Active
when
Low.
Audio
noises
are
reduced
before
and
after
the
mute
signal
when
PLL,
radio
power
supply
or
key
srtobe
change
is
controlled.
Buzzer
output
using
CGP.
Sound
to
check
keys,
to
check
settings,
to
indicate
that
a
setting
time
of
timer
is
reached
or
to
alarm
is
produced
by
using
two
kinds
of
musical
intervals
and
the sound
modulation.
nN Oo
pels!
ie)
D D
VCOH VHF
VCOM FM VCO
25 VCOL AM VCO
26 VSS1 VSS1
27
EOI
EO1
Ea
Not
use
with
this
machine.
28 EO2 EQ2
5V power supply input terminal.
NY 0
<
i)
23
24
Detects
the
voltage
reduction
of
the
AC
battery.
When
the
battery
energy
is
reduced,
the
microcomputer
is
in
the
reducedvoltage
mode.
The
battery
mark
blinks
and
the
microcomputer
waits
for
a
clock’s
reset/display
and
Power
ON
Key.
A quartz oscillating element connecting terminal. (75kHz)
Connected
to
a
capacitor
for
a
regulator
circuit
which
supplies
the
oscillator’
stable
drive voltage.
Time
display
switching
input.
It
is
a
24-hour
system
display
when
Low
and
a
12-hour
system
display
(AM/PM)
when
High.
When
the
setting
is
changed,
backup
power
supply
must
be
set
to
OFF
and
internal
RAM
must
be
initialized.
ON/OFF switching output for the radio power supply.
(ON : High , OFF : LOW)
Strobe output for initial switch input.
INIT OUT (Active : High)
o——+ INITIN 1: 12-/24-hour system display
LOW (OFF) : 24-hour system display,
Hgih (ON) : 12-hour system dispaly
o——»> INIT IN 2: Band selection
Not use with this machine.
pe
o
ies)
le
eg
30
31 XI
XO
32 VSS4 VSS4
x
He
‘
OO Ww
Ww
PA3 INIT IN1
Qo
KR
PA2 POWER OUT
nS
PAI INIT OUT