Port Allocations - Icom IC-F4001 Service Manual

4-5 PORT ALLOCATIONS

• CPU (IC51)
PIN LINE
NO. NAME
Tone signal (CTCSS/DTCS)
1 CDEC
decoding input.
Tone signal (5/2 TONE, DTMF,
2 STONE
BIIS) decoding/encoding .
Clock frequency shift.
13 CSFT
H=Clock frequency is shifted.
R X m o d e ( n a r r o w / w i d e )
switching.
14 NWC
L= While receiving in the narrow
mode
External PTT input.
15 EPTT
H=An external PTT is pushed.
Automatic TX control for VOX
16 ATX mode.
H=Microphone input is detected.
17 BEEP Beep sounds. (Square waves)
AF power AMP control.
18 AFON H= A F p owe r A M P ( I C 5 5 ) i s
activated.
19 SCK Common clock.
20 SO Common serial data.
[UPPER] key input.
22 KEY2
L=Pushed
[LOWER] key input.
23 KEY1
L=Pushed
PLL strobe.
24 PLST
H=Load enable.
D/A converter strobe.
25 DAST
H=Load enable.
26 ESDA EEPROM data.
27 ESCL EEPROM clock.
Power supply switching control.
28 R5C H= S u p p l y i n g c u r r e n t t o t h e
receiver circuits ("R5"line).
Power supply switching control.
29 T5C H= S u p p l y i n g c u r r e n t t o t h e
transmitter circuits ("T5"line).
Power supply switching control.
30 S5C H= Supplying current to the RX/
TX common circuits ("S5"line).
Power supply switching control.
31 PWON H= The transceiver's power is
ON.
Internal PTT input.
32 IPTT
L=PTT pushed.
33, CENC2,
34, CENC1, CTCSS/DTCS signal.
36 CENC0
37– CBI0–
[ROTARY SELECTOR] input.
40 CBI3
Frequency response switching.
41 DUSE
H=DTCS encoding
Busy LED (Green) control.
42 RLED
L=LED lights. (Squelch open)
Busy LED (Red) control.
43 TLED
L=LED lights. (Transmit)
47 MGC0 MIC gain control.
48 MGC1 MIC gain control.
49 CLI
Cloning data.
50 CLO
DESCRIPTION
PIN LINE
I/O
NO. NAME
I 51 ADSW
I/O 53 NOIS
54 UNLK
O
55 RMUT2
O
56 RMUT1
57 MMUT
I
58 TMUT
O
59 MDET
O
60 LVIN
61 TEMP
O
62 AFVI
O 63 VOXV
O
I
64 AD5
I
I/O
• D/A CONVERTER (IC57)
I/O
PIN LINE
I/O
No. NAME
I/O
23 T1
(TXPO)
O
24 T2
7 REF
8 LVA
O
11 SQLC Squelch threshold setting.
12 TENC CTCSS deviation adjustment.
O
19 BAL
20 VRAF Max. deviation/AF volume adjustment.
O
I
O
I
O
O
O
O
O
I
O
4 - 4
DESCRIPTION
A/D conversion select.
H=RSSI input, L=BATV input
Noise level detect.
H=Squelch close
PLL unlock detect.
RX AF mute switch control.
L=AF mute.
RX AF mute switch control.
L=AF mute.
MIC mute switch control.
L=MIC mute.
Transmission mute.
L=TX inhibit.
External microphone connection
detect.
Lock voltage input.
Temperature sensing voltage.
[VOLUME CONTROL] input.
Microphone input sensing voltage.
Remaining battery voltage.
(or)
RSSI voltage.
( The input signal depends on the
status of pin 51.)
DESCRIPTION
BPF tuning voltage
TX power control
BPF tuning voltage
Reference frequency adjust voltage.
Additional lock voltage adjustment.
DTCS balance.
I/O
O
I
I
O
O
O
O
I
I
I
I
I
I