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SECTION 3
PIN DESCRIPTION
IC2
.PD1724GB-551-1A7
LCD10-LCD1 | LCD10-LCD1 | O | LCD drive
NC
ee
COM3-COM1
COM3-COM1
LCD common
Pin for doubler circuit capacitor
connection
to develop
LCD
drive
voltage
—
a"
Audio signal mute. Active: Low. LOW when MUTE
ON.
—_
}-—— MUTE ——»
Activates buzzer. (1 kHz)
5V power supply input terminal
I
Unused pin
FM VCO
I
FM VCO input
LW/MW VCO
I
LW/MW/VC input
— co
Ro
f BO Re
|
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rs
bo
=
a8 y
i) wo
DO]
BD]
& ~ ao
>
PLL error output pin
do co
Detects power supply line status.
Power supply line OFF: Low
Power supply line ON:
High
Crystal oscillator connection pin
Pin for regulator circuit capacitor connection to attain stable drive
voltage of the oscillator
ALARM
OUT
ALARM
OUT
Cassette control input. (Unused pin)
MODE select input
MODE IN
A Mode/B Mode select signal input to switch the function of the keys
Low: A Mode
High: B Mode
CST OUT
Cassette control output. (Unused pin)
INITIALIZE OUT
Generates INITIALIZE pulse to conduct BAND 12H/24H setting imme-
diately following cold start.
ON:
High
POWER
OUT output
Radio power supply control output
SER
ONS
POWER OFF:
Low
POWER
ON:
HIGH
(Unused pin)
AM/FM select
on
pee
FM:
Low
AM:
High
LW/MW
select output (Unused pin)
iP
L
Pe
NON
LW:
High
MW:
Low
ia
a
ee
La
VDD
Eee
a
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| 26 |
||
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va
-
oo bo
i
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INIT OUT
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