Icom IC-F3061T Port Allocations, 2 D/A Converter Main Unit IC20, Expand IC Front Unit IC505

5-5 PORT ALLOCATIONS

5-5-1 CPU (MAIN UNIT; IC18)

Pin	Port	Description
No.	Name
1	DSDA	Outputs serial data to the D/A converter (IC20, pin 6).
2	DAST	Outputs strobe signal to the D/A converter (IC4, pin 6).
3	SIDE3	Input port for [Side3] key (S4).
		"Low"=When the key is pushed.
4−7	CBI0−3	Input ports for [ROTARY SELECTOR] (VR UNIT; S701).
10	SSO	Outputs serial data to the PLL IC (IC1, pin 15), D/A
		converter (IC4, pin 8).
11	SCK	Outputs serial crock signal to the PLL IC (IC1, pin
		14), D/A converter (IC4, pin 8).
13	PLST	Outputs PLL strobe signal to the PLL IC (RF UNIT;
		IC1, pin 16).
15	DASW	Outputs mode (Digital/Analog) switching signal to
		the D/A converter (IC14, pins 10, 11).
17	TMUT	Outputs transmit mute signal to the transmit mute
		switch (RF UNIT; Q606).
18	NWC2	Outputs Narrow/Wide mode switching signal to the
		bandwidth switches (Q26, D32, D33).
19	NWC1	Outputs Narrow/Wide mode switching signal to the
		bandwidth switches (Q27, Q41, Q42, D34, D35).
20	DDSD	Outputs serial data to the DTMF decode IC (IC10,
		pin 9).
21	DDAC	Outputs serial clock signal to the DTMF decode IC
		(IC10, pin 11).
		Outputs T5V line control signal to the T5V regulator
26	T5C	(Q15).
		"Low"= While transmitting.
		Output R5V line control signal to the R5V regulator
27	R5C	(Q16).
		"Low"= While receiving.
		Output S5V line control signal to the S5V regulator
28	S5C	(Q14).
		"Low"=While power save mode.
29	PTTSW	Input port for [PTT] switch (S3).
		"Low"=When the switch is pushed.
30	SIDE2	Input port for [Side2] key (S5).
		"Low"=When the key is pushed.
32	RMUT	Outputs mute signal to the AF mute switch (D42).
37	NOIS	Input port for the noise level from the FM IF IC (IC3,
		pin 13).
38	POSW	Input port for power switch (VR UNIT; R702) from
		power controller (D36).
39	DDST	Outputs strobe signal to the DTMF decode IC (MAIN
		UNIT; IC10, pin 14).
40	MTCK	Outputs serial clock signal to the base band IC
		(MAIN UNIT; IC5, pin 9).
		Outputs VCC line control signal to the power switch
41	PWON	(Q30, Q31).
		"Low"=While the power is ON.
43	SENC	Outputs single tone encode signal to the LPF (IC17,
		pin 10).
44	BEEP	Outputs beep sound to the AF circuits (IC4, pin 13).
45	SDEC	Input port for decoded 2/5 tone and DTMF signals.
46	CDEC	Input port for decoded CTCSS/DTCS signal.
47	ISENS	Input port for power amplifier current detect signal
		from the current detector (RF UNIT; Q604, Q605).
48	BATV	Input port for remaining battery power.
49	LVIN	Input port for VCO lock voltage.
50	RSSI	Input port for RSSI signal from the FM IF IC (IC3,
		pin 12).
55	EMER	Input port for [Emer] switch (VR UNIT; S702).

Pin	Port	Description
No.	Name
70	CSFT	Outputs CPU clock frequency shift signal to the CPU
		clock oscillator (X2, D38).
71	DUSE	Outputs CTCSS/DTCS select signal to the CTCSS/
		DTCS switch (Q34).
73	UNLK	Input port for PLL unlock detect signal from the PLL
		IC (IC1, pin 11).
74	RLED	Outputs RX indicator (VR UNIT; DS701) control
		signal to the LED driver (VR UNIT; Q701).
75	TLED	Outputs TX indicator (VR UNIT; DS701) control
		signal to the LED driver (VR UNIT; Q701).
78	FSDA	Outputs serial data to the expand IC (FRONT UNIT;
		IC505, pin 3).
79	FSCL	Outputs serial clock signal to the expand IC (FRONT
		UNIT; IC505, pin 3).
81	CIRQ	Input port for external connection detect signal from
		J1 and J2.
88	SIDE1	Input port for [Side1] key (S6).
		"Low"=When the key is pushed.
89−	CENC0−	Output CTCSS/DTCS signals to the LPF (IC17, pin 3).
91	2
92	EMPH	Outputs emphasis characteristic change signal to
		the D/A converter (IC13, pins 9, 10).
93	MTDT	Outputs serial data to the base band IC (IC5, pin 10).
96	MSCK	Outputs serial clock signal to the base band IC
		(MAIN UNIT; IC5, pin 13).
97	PMFM	Outputs modulation mode switching signal to the
		PM/FM switch (IC13, pin 11) .
98	ESDA	Outputs serial data to the EEPROM (IC19, pin 5).
99	ESCL	Outputs serial clock signal to the EEPROM (IC19,
		pin 6).
100	RESL	Input port for reset signal from the reset IC (IC8, pin 1).

5-5-2 D/A CONVERTER (MAIN UNIT; IC20)

Pin	Port	Description
No.	Name
1	T1	Outputs BPF tuning voltage to the tunable BPF (D23,
		D24, L31, L32, C120−C122, C125−C127).
		• While receiving
		Outputs BPF tuning voltage to the tunable BPF
2	T2	(D28, D29, L33, L34, C140−C144, C147).
		• While transmitting
		Outputs TX power setting voltage to the APC
		amplifi er (RF UNIT; IC601).
3	TXLVA	Outputs oscillation frequency adjust voltage to the
		TX VCO (Q3, D10−D12).
4	RXLVA	Outputs oscillation frequency adjust voltage to the
		RX VCO1/2 (Q1, D1−D4/Q2, D5−D8).

5-5-3 EXPAND IC (FRONT UNIT; IC505)

Pin	Port	Description
No.	Name
		Outputs AF power amplifi er (Q508, Q509) control
4	AFON	signal to the AF power amplifi er controller (Q501,
		Q502, D508).
5	LIGH	Outputs backlight control signal to the backlight
		driver (Q507−Q509).
6	SPCON	Outputs internal/external speaker select signal to
		the SP/ESP switch (Q512, Q513).
7	MCON	Outputs internal/external microphone select signal
		to the microphone controller (Q505, D504).

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