Icom IC-F2000 series Service Manual - page 11
4-3
PIN
NO.
LINE
NAME
DESCRIPTION
I/O
1
CDEC
To n e s i g n a l ( C T C S S / D T C S )
decoding input.
I
2
SENC
To n e s i g n a l ( C T C S S / D T C S )
encoding output.
O
13
CSFT
Clock frequency shift control.
H= While the frequency oscillation is
shifted.
O
14
NWC
R e c e i v i n g m o d e ( n a r r ow / w i d e )
switching.
L= While receiving in the narrow
mode.
O
15
EPTT
External PTT input.
H= An external PTT is pushed.
I
16
AUTX
MIC input control for the VOX mode.
H= While the MIC signal input is
detected.
O
17
BEEP
Outputs beep sounds to the AF AMP
(IC1).
O
18
AFON
AF power AMP control.
H= A F p o w e r A M P ( I C 5 5 ) i s
activated.
O
19
SCK
Serial data to the PLL IC (IC15,
pin 6) and D/A conver ter (IC10,
pin 8).
O
20
SO
Serial data to the PLL IC (IC15,
pin 5) and D/A conver ter (IC10,
pin 9).
O
22
ASCL
O u t p u t s c l o c k s i g n a l t o t h e
accelerometer IC (IC23, pin 6).
I
23
ASDA
O u t p u t s s e r i a l d a t a t o t h e
accelerometer IC (IC23, pin 7).
I
24
PLST
(OPV2)
PLL IC strobe.
O
25
DAST
(OPV1)
D/A converter (IC10, pin 7) strobe.
O
26
ESDA
EEPROM (IC13, pin 5) serial data.
I/O
27
ESCL
EEPROM (IC13, pin 6) serial clock.
I/O
28
R5C
RX power supply line control signal
to the R5V line regulator (Q16).
L= While receiving.
O
29
T5C
TX power supply line control signal
to the T5V line regulator (Q17).
L= While transmitting.
O
30
S5C
TX/RX common power supply line
control signal to the S5V regulator
(Q15).
L =While power save mode.
O
32
DUSE
Outputs CTCSS/DTCS select signal
to the tone.
I
33,
34,
36
CENC2,
CENC1,
CENC0
CTCSS/DTCS signal.
O
37–
40
CBI0,
CBI1,
CBI2,
CBI3
[ROTARY SELECTOR]
input.
O
41
DUSE
Frequency response switching.
H=DTCS encoding
O
42
RLED
LED Indicator control signal.
L= While receiving a signal, or when
the squelch opens.
O
43
TLED
LED Indicator control signal.
L= Lights. (While transmitting)
O
4-5 PORT ALLOCATIONS
• CPU (IC9)
PIN
NO.
LINE
NAME
DESCRIPTION
I/O
47
MGC0*
MIC sensitivity control.
O
48
MGC1*
49
CLI
Cloning data.
I
50
CLO
O
51
ADSW
A/D conversion select.
H= RSSI input L= BATV input.
O
53
NOIS
Noise level detect.
H= Squelch is closed.
I
55
RMUT2
RX AF mute switch control.
L= During the squelch is closed.
O
56
RMUT1
57
IPTT
[PTT]
input.
L= Pushed.
I
58
TMUT
Transmission mute.
L= TX inhibit.
O
60
LVIN
Lock voltage input.
I
61
TEMP
Transceiver temperature sensing
voltage.
I
62
AFVI
[VOL]
input.
I
63
VOXV
Microphone input sensing voltage.
I
*: MIC
sensitivity
setting.
Line name
MGC0
MGC1
MIC sensitivity
Line state
H
H
4 (Maximum)
L
H
3
H
L
2
L
L
1 (Minimum)