Port Allocations - Icom IC-F5012 Service Manual

5-5 PORT ALLOCATIONS

• CPU (FRONT UNIT; IC1)
Pin Port
No. Name
KR1−
1−3 Dealer-programmable keys input.
KR3
10 CCS Chip-select signal to the attached optional unit. O
19− CENC0−
CTCSS/DTCS signal.
21 CENC2
Frequency response of tone filter (IC5)
23 DUSE switching control.
"Low"=While transmitting.
PTT input.
24 IPTT
"Low"=PTT is pushed.
Microphone on/off hook detect.
25 HANG
"Low"=The microphone is off hook.
30 PLST PLL strobe to the PLL IC (MAIN UNIT; IC4, pin 11). O
PLL unlock detect signal from the PLL IC
34 ULCK (MAIN UNIT; IC4, pin 7).
"Low"=While the PLL circuit is unlocked.
Key indicator LED for [P1] (DS9) control.
35 LED1
"High"= Lights.
Key indicator LED for [P2] (DS8) control.
36 LED2
"High"= Lights.
Key indicator LED for [P3] (DS7) control.
37 LED3
"High"= Lights.
[PWR] key input.
28 POSW
"Low"=Pushed.
Serial data to the D/A converter (MAIN UNIT;
39 DSDA
IC20, pin 6).
43 SENC DTMF signals to the LPF (IC5, pin 3).
44 BEEP Beep audio.
45 SDEC DTMF signals.
46 CDEC CTCSS/DTCS signals.
48 BATV Power supply voltage.
49 LVIN VCO lock voltage.
Received signal strength level signal from the IF
50 RSSI
demodulator IC (MAIN UNIT; IC1, pin 12).
51 TEMP Temperature sensing voltage.
[VOL] dial (R14) input. (divided voltage of "5V"
52 AFVI
line)
CPU reset signal from the reset IC (IC8, pin 1).
59 RES
"Low"=CPU is reset.
CPU clock shift signal to the clock frequency
69 CSFT
shift switch (D6).
Strobe signal to the D/A converter (MAIN
71 DAST
UNIT; IC18, pin 7).
72 IGSW Ignition SW input.
Noise signal from the IF demodulate IC (MAIN
75 NOIS
UNIT; IC1, pin 13).
82 ESDA Serial data to the EEPROM (IC3, pin 5).
85 ESCL Clock signal to the EEPROM (IC3, pin 6).
Transceiver's power control.
86 PWON
"High"=Power ON.
Channel indicator LED for [CH4] (DS3) control.
87 CH4L
"High"= Lights.
Channel indicator LED for [CH3] (DS4) control.
88 CH3L
"High"= Lights.
Channel indicator LED for [CH2] (DS5) control.
89 CH2L
"High"= Lights.
Channel indicator LED for [CH1] (DS6) control.
90 CH1L
"High"= Lights.
Key backlight LED (DS1, DS2) control.
95 LIGT2
"High"=Backlight is ON.
TX indicator LED (DS10) control.
96 TLED
"High"= Lights red (While transmitting).
RX indicator LED (DS10) control.
97 RLED
"High"= Lights green (While receiving).
Description
Pin Port
I/O
No. Name
Serial clock signal to the PLL IC (IC4, pin 9)
I
98 SCK and D/A converters (IC17, pin 3/IC18, pin 8/
IC20, pin 7).
Serial data to the PLL IC (IC4, pin 9) and D/A
99 SO
O
converters (IC17, pin 3/IC18, pin 8/IC20, pin 7).
100 KR0 Input ports for dealer-programmable keys.
O
I
• EXPANDER (MAIN UNIT; IC17)
Pin Line
I
No. Name
4 RXC
5 AFON
I
O
6 NWC
O
O
7 RMUT
I
O
12 HORNO
O
O
13 TMUT
I
I
I
I
• D/A CONVERTER (MAIN UNIT; IC18)
I
Pin
I
No.
2, 3 MIC signal level adjustment.
I
4, 5 RX AF/MIC signal level adjustment.
I
16, 17 Tone signal level adjustment.
Oscillation frequency control voltage to the reference
18, 19
O
frequency oscillator (X2).
20, 21 Modulation signal level adjustment.
O
22, 23 Beep sound loudness adjustment.
I
24, 25 Squelch threshold level adjustment.
I
O
• D/A CONVERTER (MAIN UNIT; IC20)
O
Pin Line
I
No. Name
• While receiving
O
Tuning voltage to the tuned BPF (D4, D8).
1 T1 • While transmitting
O
TX power level setting signal to the APC AMP
IC2).
O
2 T2 Tuning voltage to the tuned BPF (D9, D10).
Oscillation frequency correcting voltage to the TX
3 TLVA
O
VCO (Q13, D16, D18, D31, D53).
Oscillation frequency correcting voltage to the RX
4 RLVA
O
VCO (Q14, D33, D34, D52).
O
O
5 - 5
Description
Description
T8V, R8V lines and RX VCO ON/OFF control.
AF mute SW (Q35) control.
"Low"=Mute
• RX band width switching signal to the 2nd IF
fi lter SW (D56, D57).
"Low"=Narrow mode
• RX band width switching signal to the phase
shifter SW (Q5).
"Low"=Wide mode
AF mute signal to the analog switch (IC3,
pins 12, 13).
"Low"=While the squelch is close or transmitting.
External device control.
"Low"= Pin 6 of OPC-1939 or pin 10 of OPC-
2078 (if connected) is "Low."
Transmit mute signal to the transmit mute switch
(Q46).
"High"=Transmitting is muted.
Description
Description
I/O
O
O
I