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4-4. IC PIN FUNCTIONS
¢ IC2 ( 1 PD1724GB-648-1P7)
INITIALIZE
LW TVH
KEY SCAN
KEY RET
Initialize output.
Band output. Low : LW, High : MW
Conducts Key Scan. (pin @ : Not in use.)
Key Return input. (pin® : Not in use.)
Terminated to initialize.
48 | K3 — KO
45 —
4
5
[Signal Name _|
mn [Nc
[-
«4d '| nwinwe SS
OCOCSCSCSOSOOSOCOCOCSC"'C"CSCSCS
Lees
Ee
Pin for doubler circuit capacitor connection to develop LCD drive voltage.
Audio signal mute. Active : Low. LOW when MUTE ON.
19
VDP
MUTE
|
|
~—- MUTE —>|
| 20 [core
Beer
| O_| Activates buzzer
po tNC
=
=| Terminated to VoD
| 2
|vp
$|[-
|
=|
3V power supply input terminal.
25 Saat eee a
NES
| 24 |vcom
| rMvco |__| FM VCO input
| 25 | veo.
| AMvco | ot | AMVCOimut
a
ae Eee Em
Poa feo
=| Notin se
| 28 [poe
= |_|
PLL error output
safe
fe
fe Detects power supply line status.
29
CE
CE
Power supply line OFF : Low
Power supply line ON : High
| 30 [xo
xour
0
Crystal oscillator connection terminal. (75kHz)
EO ET
a2] vst
| —_| Pinforregltor crit apactor connection tan sabe dive volge of the oiler
PA3
PACD...
(sar.
Terminated to VDD
[se [rar —sdfarMour | 0 [Nome
SOSC~C—CSSC'"S*s~*Y
fas | pao
| BATHFMAM | _O | BANDoutput_Low: FM High: AM
41—44|
PC3 — PCO
|KEYSCAN
| O |
:
|KEYRET |
eee
psoo tne
| Notin use
[si ~s6| uebi6-Lepi1| Lepis—Lepi |__| LeD drive
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