Port Allocations - Icom IC-2300H Service Manual Addendum

4-5 PORT ALLOCATIONS

• CPU (LOGIC UNIT: IC1)
Pin Line
No. Name
1 MICSEL Microphone connection detect.
3 TONE DTMF/BEEP/1750Hz tone signal.
Tone signal (CTCSS/DTCS) encoding
4 CTCOUT
output.
CPU (LOGIC UNIT: IC1) reset signal.
10 RESET
H=The CPU is reset.
Shift register (MAIN UNIT: IC2) serial
15 EXTSTB
strobe.
D/A converter (MAIN UNIT: IC5)
16 DASTB
strobe.
Shift register (MAIN UNIT: IC2) serial
17 DATA
data.
Shift register (MAIN UNIT: IC2) serial
18 EXTCK
clock.
19 NOIS Noise level detect.
20 CLIN Cloning data.
21 CLOUT Cloning data.
[ ] input.
22 PWRSW
L= Pushed.
Shift register (MAIN UNIT: IC2) chip
23 OE
enable.
Main power supply line control.
24 PCON
H=During the transceiver is ON.
PLL unlock detect.
25 UNLK
L=Unlocked.
26 PLLCK PLL IC (MAIN UNIT: IC1) serial clock.
27 PLLDATA PLL IC (MAIN UNIT: IC1) serial data.
28 PLLSTB PLL IC (MAIN UNIT: IC1) strobe.
VOL- Electronic volume (LOGIC UNIT: IC25)
29
DATA serial data.
Electronic volume (LOGIC UNIT: IC25)
30 VOLCK
serial clock.
71, KS1,
72 KS0
Key input ports.
76– KR3–
79 KR0
80 LVIN Lock voltage input.
81 HVIN Power source voltage.
82 WX Weather alert signal.
Tone signal (CTCSS/DTCS) decoding
83 CTCIN
input.
84 SQLV [SQL] input.
85 VOLV [VOL] input.
86 MICUD Up/down key on the microphone.
RSSI voltage from the IF IC (MAIN
87 SD
UNIT: IC3).
88 TEMP Temperature sensing voltage.
TX power AMP current fl ow sensing
89 IDET
voltage.
EEPROM (LOGIC UNIT: IC5) serial
94 ESCK
clock.
EEPROM (LOGIC UNIT: IC5) serial
95 ESDA
data.
Rotary encoder (LOGIC UNIT: S9)
97 DICK
pulse. (Phase A)
Rotary encoder (LOGIC UNIT: S9)
98 DIUD
pulse. (Phase B)
Description
Pin Line
I/O
No. Name
I
99 PTT
O
100 REMO
O
I
• D/A CONVERTER (MAIN: IC5)
O
Pin Line
O No. Name
6, 7 SQLIN
O
8 T3
O
11 T2_APC
I
I
12 T1
O
19 FC
I
20 REFMOD
O
22, 23 MOD
O 24 SQLATT
I
O
• SHIF REGISTER (MAIN: IC2)
O
Pin Line
O
No. Name
O
5 PLLSW
O
6 TXMUTE
I
7 NWC
I
I
11 SHIFT
I
I
12 T8C
I
I
13 RXC
I
I
14 SPMUTE
I
I
I
O
I/O
I
I
4 - 4
Description
[PTT] input.
H= Pushed.
Microphone connection detect.
H=Connected.
Description
Noise squelch level adjustment.
Tuned BPF tracking voltage adjust-
ment.
RX: Tuned BPF tracking voltage ad-
justment.
TX: Transmit output power adjustment.
Tuned BPF tracking voltage adjust-
ment.
Reference frequency adjustment.
Reference oscillator deviation adjust-
ment.
VCO deviation adjustment.
Squelch attenuator level adjustment.
Description
PLL lockup time control.
H=Fast lockup mode.
TX mute control.
L=Mute.
Narrow/Wide mode switching control.
H=Wide mode.
VCO switching control.
H= While receiving. (The RX VCO
(Q14, D10–D11, L6) is activated)
L= While transmitting. (The TX VCO
(Q13, D7–D9, L5) is activated)
Power supply line "T8C" control.
H=While transmitting.
Power supply line "R5V" control.
H=While receiving.
Speaker mute control.
H=Mute.
I/O
I
I