Icom iF110 Service Manual page 11

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Pin Port
number name
OPT3– I/O ports for the optional board control
44–46
OPT1 signals.
Input port for the clock sigal from the
48 SI
optional board via J1.
Input port for the cloning signal.
49 CLI
CLO Output port for the cloning signal.
50
51 POSW Input port for the POWER switch.
• Input port for the remote power con-
trol signal from the external connec-
52 IGSW
tor.(J6)
• Input port for the dimmer control.
Input port for the "NOIS" signal from
83 NOIS the FM IF IC (MAIN unit; IC1) for noise
squelch operation.
Input port for interruption signal from
54 CIRQ
the optional board via J1.
Outputs chip select signal for the
55 CCS
optional board via J1.
Input port for the PTT switch from
56 PTT
microphone.
Input port for the PTT switch from the
57 EPTT external connector (J6).
Low : External PTT switch is ON.
Input port for the microphone hanger
58 HANG detection signal.
Low : Microphone on hook.
Input port for the AF volume control
59 AFVI signal (R14).
High : [VOL] is maximum clockwise.
Input port for the CTCSS/DTCS decod-
60 CDEC
ing signals.
Input port for the single tone decoding
61 SDEC
signal.
Input port for the optional board detec-
62 OPV1V2
tion signal.
Input port for receiving signal strength
63 RSSI
level detection.
64 LVIN Input port for the PLL lock voltage.
Description
4-5-2 OUTPUT EXPANDER (MAIN UNIT; IC17)
Pin Port
number name
4 RXC
5 AFON
6 NWC
7 RMUT
13 TMUT
14 MMUT
4-5-3 LCD DRIVER (FRONT UNIT; IC6)
Pin Port
number name
LIGT1
1
LIGT2
2
SEG32–
3–34
SEG1
COM4–
35–38
COM1
4 - 5
Description
Outputs transmit/receive control signal.
High: While receiving.
Outputs audio output control signal.
High: While receiving.
Outputs wide/narrow control signal.
High: Wide is selected.
Outputs receiving mute control signal.
Low: While receiving is muting.
Outputs transmitting mute control sig-
nal.
Low: While transmitting is muting.
Outputs the microphone mute control
signal.
Low: While the microphone is muting.
Description
Outputs dimmer control signal.
High: Dimmter is ON.
Outputs backlight control signal.
High: Backlight is ON.
Output LCD segment signals.
Output LCD common signals.