Icom IC-M802 3-7PORT ALLOCATIONS

3-7 PORT ALLOCATIONS

3-7-1 MAIN CPU (MAIN UNIT; IC3303)

Pin	Port	Description
number	name
1	TXS	Outputs T8 regulator circuit	(MAIN
		unit; Q1501) control signal.
2	RXS	Outputs R8 regulator circuit	(MAIN
		unit; Q1502) control signal.
3	PSEL	Outputs serial strobe signal	to the
		latch control IC (IC3601, pin 1).
4	BEEP	Outputs beep audio signals.
6	PDAT	Outputs serial data signal for the PLL
		circuits.
7	PCK	Outputs serial clock signal for the PLL
		circuit.
11	UNLK	Input port for PLL unlock signal.
19	PWRS	Outputs switching relay (PA unit;
		RL6701) control signal.
23	DRES	Outputs the RESET signal.
24	STBO	Outputs strobe signal for the DSP unit.
26	RQO	Outputs data signal for the DSP unit.
27	RQI	Outputs serial data signal for the DSP
		unit.
28	DO	Input port for the serial data	signal
		from the DSP unit.
29	NMEI	Input port for the NMEA signal.
30	NMEO	Outputs NMEA signal for PLL unit.
32	NMEI2	Input port for the GPS signal from the
		PLL unit.
33	LSTB	Outputs serial strobe signal	for the
		IC3602, IC3603.
34	DSTB	Outputs strobe signal for the D/A con-
		verter IC (IC3606).
		Outputs serial clock signal for
37	LCK	IC3602–IC3605, D/A converter IC
		(IC3606) and DSP unit.
		Outputs serial data signal for the
38	LDAT	IC3602, IC3603 and D/A converter IC
		(IC3606).
47	MSTB	Outputs serial strobe signal	for the
		IC3603, IC3605.
48	PSTB	Outputs PLL strobe control signal for
		the LATCH controller (IC3601).
49	SQLC	Outputs squelch control signal for the
		SQL switching IC (IC1701).
		Outputs the optional antenna tuner
79	STAT	start control signal for the PA unit via
		the J1901.
		Input port for the optional antenna
80	KEYS	tuner key control signal via the PA
		unit.
89	EDT	I/O port for the serial data	signals
		from/to the EEPROM (IC3301, pin 5).

MAIN CPU (MAIN UNIT; IC3303)–continued

Pin	Port	Description
number	name
90	ECK	Outputs serial clock signal for the
		EEPROM (IC3301, pin 6).
92	ASEN	Input port for the SEND signal from
		the accessory connector (J1801).
93	TEMP	Input port for the power amplifier tem-
		perature signal from the PA unit.
		Input port for the SEND signal from
94	NSEN	the AF/MOD connector (PLL unit;
		J5051, pin 8) via the J3602.
		Input port for the RF/ANTC meter’s
97	RFML	voltage from the meter amplifier
		(IC1201, pin 14).

3-7-2 OUTPUT EXPANDER IC FOR THE PLL STROBE (IC3601)

Pin	Port	Description
number	name
4	PST1	Outputs strobe signal for the DDS IC
		(PLL unit; IC5101, pin 91).
5	PST2	Outputs strobe signal for the PLL IC
		(PLL unit; IC5401, pins 13).
6	PST3	Outputs strobe signal for the DDS IC
		(PLL unit; IC5701, pin 41).
7	PST4	Outputs strobe signal for the DDS IC
		(PLL unit; IC5801, pin 41).
14	PST5	Outputs strobe signal for the DDS IC
		(PLL unit; IC5901, pin 41).

3-7-3 OUTPUT EXPANDER IC FOR THE FILTER UNIT (IC3602)

Pin	Port	Description
number	name
4	L0S	Outputs 0.5–1.999999 MHz low-pass
		filter control signal.
5	L1S	Outputs 2–2.999999 MHz low-pass fil-
		ter control signal.
6	L2S	Outputs 3–4.999999 MHz low-pass fil-
		ter control singnal.
7	L3S	Outputs 5–6.999999 MHz low-pass fil-
		ter control signal.
11	L7S	Outputs 20–30 MHz low-pass filter
		control signal.
12	L6S	Outputs 14–19.999999 MHz low-pass
		filter control signal.
13	L5S	Outputs 10–13.999999 MHz low-pass
		filter control signal.
14	L4S	Outputs 7–9.999999 MHz low-pass fil-
		ter control signal.

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