Power Supply Circuits; Port Allocations - Icom IC-GM1600E Service Manual

4-4 POWER SUPPLY CIRCUITS

4-4-1 VOLTAGE LINES
LINE
The voltage from the connected DC power
supply passed through the [VOL] switch (R1:
VCC
VR BOARD).
5V for the CPU (IC661) converted from the
CPU5V
VCC line at the CPU5V regulator circuit (IC551).
Common 5V line converted from the VCC line
M5V
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
NUMBER NAME
1 BEEP
3 EXSTB
4 DASTB
5 PLSTB
6 ERXDI
7 ETXDO
10 SDATA
11 SCK
12 ESCK
13 ESDA
14 TLED
15 RLED
17 CSIFT
25 RESET
27 WDECV
28 EXDET
29 VOXT
30 BATTV
31 TDETV
32 NOISV
33 RSSIV
34 LOINV
35 TEMPV
75, 76 CONT1, CONT2
DESCRIPTION
DESCRIPTION
Output port for BEEP signal.
Output port for external expander
strobe signal.
Output port for external D/A strobe
signal.
Output port for PLL strobe.
Input port for cloning.
Output port for cloning.
Output port for serial data.
Output port for serial clock.
Input port for EEPROM clock.
I/O port for EEPROM data.
Output port for TX LED driver.
Output port for RX LED driver.
Output port for clock shift signal.
Input port for reset signal.
Input port for WX tone signal.
Input port for the [MIC/SP] detect
signal.
Input port for VOX signal.
Input por t for battery voltage
detection signal.
Input port for TX power level.
Input port for noise level.
Input port for RSSI level.
Input port for PLL lock voltage level.
Input port for temperture level.
Output ports for LCD contrast
control signal.
PIN PORT
NUMBER NAME
77, 78 LEDS1, LEDS2
80 MICMS
81 ISPMS
84 AFMS
85 AFVS
102 PTTIN
103 EXPTT
104 BTYPE
105 PTTM
106–108 MIC1–MIC3
109 SQL
110 UP
111 DOWN
112 CH/WX
113 16/9
114 SCAN
115 H/L
117 VOXM
119 UNLK
4-5-2 EXPANDER (IC341)
PIN PORT
NUMBER NAME
6 DETMS
11 ATTS
12 TXMS
13 VCOS
14 SQLT
4 - 4
DESCRIPTION
Output port for dimmer control
signal.
Output port for microphone mute
signal.
"HIGH": Microphone mute
Output port for internal speaker
mute signal.
"HIGH": Speaker mute
Output port for AF mute signal.
Output port for AF amplifier power
supply control signal.
Input port for [PTT] switch.
Input port for external PTT switch.
I n p u t p o r t fo r b a t t e r y t y p e
detection.
Output port for microphone mute
signal.
Output por ts for microphone
sensitivity detection signal.
Input port for [SQL] key.
Input port for [Y] key.
Input port for [Z] key.
Input port for [CALL] key.
Input port for [16] key.
Input port for [CH] key.
Input port for [Hi/Lo] key.
Ouput port for mute signal in VOX
mode.
Input port for PLL unlock signal.
DESCRIPTION
Output port for DET mute signal.
Output port for RF attenuator control
signal.
Output port for TX mute signal.
TX/RX VCO switching signal.
Output port for squelch control signal.