Cpu Port Allocations - Icom iC-m34 Service Manual

4-5 CPU PORT ALLOCATION
Pin Port
No. Name
1 BEEP Beep sounds.
PLL mode control signal.
2 PS
"Low"=power save mode.
3 TDEC Tone signals.
4 DASTB Strobe signal to D/A converter.
5 PLSTB Strobe signal to the PLL IC.
10 SDATAO Common serial data.
11 SCLK Common clock signal.
12 ESCK Common clock signal to the EEPROM.
13 ESDA Data signal to the EEPROM.
23, OSC2,
CPU clock input.
24 OSC1
25 RES CPU reset signal.
27 TEMPV Transceiver's internal temperature.
29 LOINV Lock voltage from the PLL IC.
30 TDETV Transmit power detect signal.
31 BATTV Battery voltage.
32 RSSIV RSSI signal from IF IC.
33 NOISV Noise signal from IF IC.
35 EXDET External cpnnection detect signal.
36 WDECV Weather alart signal.
38 ATIS ATIS signals.
46− COM0−
LCD segments.
48 COM2
51−
SEG0−21 LCD segments.
72
80 MICMS Microphone mute signal.
83 AFMS AF mute switch control signal.
84 V5VS V5V power line control signal.
85 AFVS AF power amplifi er switch control signal.
86 5VS 5V power line control signal.
87 S5VS S5V power line control signal.
TX power control signal.
88 LOW
"High"=While the TX power is low..
R5V power line control signal.
89 R5VS
"High"=While receiving.
T5V power line control signal.
90 T5VS
"High"=While transmitting.
97 TXMS Transmit mute signal.
98 DETMS AF mute signal to the D/A converter.
Attenuator control signal.
99 ATTS "High"=While the attenutor function is
activated.
Input port for external [PTT] switch.
102 EXPTT
"Low"=While the switch is pushed
Input port for [PTT] switch.
103 PTTIN
"Low"=While the switch is pushed
104 BTYPE Battery type detection signal.
106 WET Leaking detection.
Input port for [16/9] key.
108 16/9
"Low"=While the key is pushed
Input port for [CH/WX] key.
109 CH/WX
"Low"=While the key is pushed
Input port for [Y] key.
110 UP
"Low"=While the key is pushed
Input port for [Z] key.
111 DOWN
"Low"=While the key is pushed
Input port for [FAV] key.
112 FAV
"Low"=While the key is pushed
Input port for [VOL] key.
113 VOL
"Low"=While the key is pushed
Input port for [SCAN] key.
114 SCAN
"Low"=While the key is pushed
Signal Description
Pin Port
No. Name
I/O
115 SQL
OUT
116 H/L
OUT
120 UNLKI
OUT
OUT
OUT
OUT
OUT
OUT
IN/
OUT
IN
OUT
IN
IN
IN
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
4 - 4
Signal Description
Input port for [SQL] key.
"Low"=While the key is pushed
Inputport for [H/L] key.
"Low"=While the key is pushed
PLL unlock detect signal.
"High"=While the PLL circuit is unlocked.
I/O
IN
IN
IN