Icom IC-FR3000 manual Port Allocations, Expander IC Logic Unit IC39, Expander IC Logic Unit IC40

3-6 PORT ALLOCATIONS

3-6-1 EXPANDER IC (LOGIC UNIT; IC39)

Pin	Port		Description
number	name
4	BASL	Outputs the control signal for “BASE”
		LED on the FRONT unit.
5	RMTL	Outputs	the control signal for
		“REMOTE” LED on the FRONT unit.
6	BUSYL	Outputs the control signal for “BUSY”
		LED on the FRONT unit.
7	TXL	Outputs	the control signal for “TX”
		LED on the FRONT unit.
12	D5C	Outputs the control signal for the D5V
		on the FRONT unit.
13	PROGL	Outputs the control signal for “P” LED
		on the FRONT unit.
14	DCL	Outputs	the control signal for “DC”
		LED on the FRONT unit.

3-6-2 EXPANDER IC (LOGIC UNIT; IC40)

Pin	Port	Description
number	name
4	AFMUTE1	Outputs the speaker mute signal for
		the received AF.
		Outputs the speaker mute signal for
5	AFMUTE2	the received 2/5TONE and DTMF
		signals.
6	MICMUTE1	Outputs the MIC mute signal for the
		hand microphone.
7	MICMUTE2	Outputs the MIC mute signal for the
		REMOTE connector.
11	TELBMR	Outputs the pulse control signal for
		the telephone dialer IC
12	TELMUTE2	Outputs the MOD mute signal for
		AF signal from the telephone line.
13	TELMUTE1	Outputs the telephone mute signal for
		the received AF signal.
14	MICMUTE3	Outputs the MIC mute signal for the
		ACC connector.

3-6-3 EXPANDER IC (LOGIC UNIT; IC41)

Pin	Port	Description
number	name
		Outputs the switch control signal for
5	R/BSW	the received AF signal to the micro-
		phone amplifier.
6	W/NS	Outputs the control signal for nar-
		row/wide bands.
7	R9C	Outputs the control signal for the +9V
		regulator on the RX unit.
12	M9C	Outputs the control signal for the M9V
		regulator on the Rx unit and TX unit.
13	OPT1	Output the detection signals whether
14	OPT3	optional boards are installed or not.

3-6-4 D/A CONVERTER IC (LOGIC UNIT; IC25)

Pin	Port	Description
number	name
6	DA2STB	Input port for the strobe signal.
7	SCK	Input port for the clock signal.
8	SDTO	Outputs the serial data to the CPU
		(LOGIC unit; IC33).
9	AFFTTI	Input port for the received AF signal.
10	AFATTO	Outputs the adjusted AF signal for the
		repeater output.
		Outputs the adjustment signal for the
14	RVCON	PLL reference frequency on the RX
		unit.
15	TUNE	Outputs the BPF tuning signal to the
		RX unit.

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