Icom IC-FR3000 manual 5 D/A Converter IC TX Unit IC5

3-6-5 D/A CONVERTER IC (TX UNIT; IC5)

Pin	Port	Description
number	name
1	ETONE	Input port for the TONE signal from
		the ACC connector.
2	ETONEO	Outputs the adjusted external TONE
		signal.
3	TXAFO	Outputs the TX AF signal to the TX
		modulation.
4	TXAF	Input port for the AF signal.
6	DA1STB	Input port for the strobe signal.
7	SCK	Input port for the clock signal.
8	SDTO	Outputs the serial data signal to the
		CPU (LOGIC unit; IC33).
9	TONE	Input port for the TONE signal.
10	TONEO	Outputs the adjusted TONE signal.
11	PCON	Outputs the TX power control signal.
14	TVCON	Outputs the adjustment signal for the
		TX unit PLL reference frequency.
15	MODC	Outputs the control signal for modula-
		tion balance.
		Input port for the mixed signal with the
21	MIXO	external signal, TX AF signal and
		internal signals.
22	REFMOD	Outputs the adjustment signal for
		TONE balance.
23	MOD	Outputs the adjusted AF signal for the
		TX modulation.
24	MIXO	Input port for the mixed signal with the
		ETONE, TX AF and TONE signals.

3-6-6 CPU (LOGIC UNIT; IC33)

Pin	Port	Description
number	name
1	RPLSTB	Outputs the strobe signal for the PLL
		IC on the RX unit.
2	TPLSTB	Outputs the strobe signal for the PLL
		IC on the TX unit.
3	TUNLK	Input port for the unlock signal from
		the PLL IC on the TX unit.
4	TMUTE	Outputs the TX mute signal for the TX
		unit.
5	TMUTE2	Outputs the TX mute signal for the PA
		unit.
8	M_PTT	Input port for the PTT switch signal
		from the microphone.
9	SPMUTE	Input port for [SPMUTE] switch.
10	REMOTE	Input port for [REMOTE] switch.
11	R/B	Input port for [R/B] switch.
13	MBEEP	Outputs the BEEP signal for modula-
		tion.
15	MONI	Input port for [MONI] switch.
16	CHUP	Input port for [CHUP] switch.
17	CHDN	Input port for [CHDN] switch.
18	DISP	Input port for [DISP] switch.
19	PROG	Input port for [PROG] switch.
26	COAXSW	Outputs the antenna switching signal.
27	CWO	Outputs the CW signal for transmit.
28	KBEEP	Outputs the beep audio signals to the
		speaker.
29	M/SO	Outputs the master/slave switching
		signal.
30	M/SI	Input port for the master/slave switch-
		ing signal.
33	E_PTT	Input port for the PTT signal form the
		REMOTE connector.
34	E_PT2	Input port for PTT signal from the ACC
		connector.
35–39	D0–D4	Input port for the memory channel
		control signal.
40	NDET	Input port for the noise signal from the
		FM IF IC (RX unit; IC2).
41	SW	Outputs the temperature or PLL lock
		voltage switching signal.
43	2/5T	Outputs the 2/5TONE and DTMF sig-
	DTMFO	nals.
44	CTDTO	Outputs the CTCSS/DTCS signals.
45	PSD	Input port for the detection signal from
		the REG unit.
46	FWSWR	Input port for FW SWR signal from the
		PA unit.

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