Icom IC-GM1600, IC-GM1600E 4-4POWER SUPPLY CIRCUITS, 4-5PORT ALLOCATIONS, VCC, M5V, T5V, S5V, R5V, PIN, PIN, PIN, LINE, PORT, NAME, PORT, NAME, PORT, NAME, CPU5V, NUMBER, NUMBER, NUMBER

4-4 POWER SUPPLY CIRCUITS

4-4-1 VOLTAGE LINES

LINE	DESCRIPTION
	The voltage from the connected DC power
VCC	supply passed through the [VOL] switch (R1:
	VR BOARD).
CPU5V	5V for the CPU (IC661) converted from the
	VCC line at the CPU5V regulator circuit (IC551).
M5V	Common 5V line converted from the VCC line
	at the M5V regulator circuit (Q551–Q553).
	5V for the transmit circuits controlled by the
T5V	T5V control circuit (Q323) using the T5VS
	signal from the CPU (IC661, pin 90).
	5V for the AF circuits controlled by the S5V
S5V	control circuit (Q561) using the S5VS signal
	from the CPU (IC661, pin 87).
	5V for the receive circuits controlled by the R5V
R5V	controll circuit (Q322) using the R5VS signal
	from CPU (IC661, pin 89).

4-5 PORT ALLOCATIONS

4-5-1 CPU (IC661)

PIN	PORT	DESCRIPTION
NUMBER	NAME
1	BEEP	Output port for BEEP signal.
3	EXSTB	Output port for external expander
		strobe signal.
4	DASTB	Output port for external D/A strobe
		signal.
5	PLSTB	Output port for PLL strobe.
6	ERXDI	Input port for cloning.
7	ETXDO	Output port for cloning.
10	SDATA	Output port for serial data.
11	SCK	Output port for serial clock.
12	ESCK	Input port for EEPROM clock.
13	ESDA	I/O port for EEPROM data.
14	TLED	Output port for TX LED driver.
15	RLED	Output port for RX LED driver.
17	CSIFT	Output port for clock shift signal.
25	RESET	Input port for reset signal.
27	WDECV	Input port for WX tone signal.
28	EXDET	Input port for the [MIC/SP] detect
		signal.
29	VOXT	Input port for VOX signal.
30	BATTV	Input port for battery voltage
		detection signal.
31	TDETV	Input port for TX power level.
32	NOISV	Input port for noise level.
33	RSSIV	Input port for RSSI level.
34	LOINV	Input port for PLL lock voltage level.
35	TEMPV	Input port for temperture level.
75, 76	CONT1, CONT2	Output ports for LCD contrast
		control signal.

PIN	PORT	DESCRIPTION
NUMBER	NAME
77, 78	LEDS1, LEDS2	signal.Output port for dimmer control
		Output port for microphone mute
80	MICMS	signal.
		"HIGH": Microphone mute
		Output port for internal speaker
81	ISPMS	mute signal.
		"HIGH": Speaker mute
84	AFMS	Output port for AF mute signal.
85	AFVS	Output port for AF amplifier power
		supply control signal.
102	PTTIN	Input port for [PTT] switch.
103	EXPTT	Input port for external PTT switch.
104	BTYPE	Input por t for batter y type
		detection.
105	PTTM	Output port for microphone mute
		signal.
106–108	MIC1–MIC3	Output ports for microphone
		sensitivity detection signal.
109	SQL	Input port for [SQL] key.
110	UP	Input port for [Y] key.
111	DOWN	Input port for [Z] key.
112	CH/WX	Input port for [CALL] key.
113	16/9	Input port for [16] key.
114	SCAN	Input port for [CH] key.
115	H/L	Input port for [Hi/Lo] key.
117	VOXM	Ouput port for mute signal in VOX
		mode.
119	UNLK	Input port for PLL unlock signal.

4-5-2 EXPANDER (IC341)

PIN	PORT	DESCRIPTION
NUMBER	NAME
6	DETMS	Output port for DET mute signal.
11	ATTS	Output port for RF attenuator control
		signal.
12	TXMS	Output port for TX mute signal.
13	VCOS	TX/RX VCO switching signal.
14	SQLT	Output port for squelch control signal.

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