Icom IC-2000 Service Manual

3-5
PORT
ALLOCATIONS
3-5-1
CPU (LOGIC UNIT IC2)
PIN
NUMBER
PORT
NAME
SIGNAL
NAME
DESCRIPTION
2
ANO MIC UD Input port for the [UP]/[DN]
switch on the microphone.
3
AN1 PTT Input port for the
[PTT] switch.
“High”: PTT
is pushed.
4 AN2
S/RF Input port for the S/RF
meter
signal.
5
AN3 SQL Input
port for the noise
squelch signal
from the FM IF
1C
(MAIN unit IC4).
"Low”: squelch open.
8
OSC
—
Terminals for the CPU clock.
9
OSC2
10
RESET RESET Input port for the CPU
reset
signal.
14 DO 13/
DTSTB
Outputs a
strobe signal to an
optional
UT-101 DTMF UNIT.
15
D1 TOSTB Outputs a
strobe signal
to
an
optional UT-85 TONE
SQUELCH UNIT.
16 D2
EXSTB Outputs a strobe signal to
the
expander
1C
(MAIN
unit IC9).
17 D3 MREMO Outputs a mic
audio mute
signal to lead DTMF
signals
to
an
optional UT-101 DTMF
UNIT for the mic remote
function.
18 D4
ECK Outputs
clock signals to the
EEPROM (ICS).
19 D5
EDATA Serial bus
line
to
the EEPROM
(ICS).
20 D6
STD Input
port for the
decode
signal for the
DTMF decoder.
22 D8
DET Input
port for the
decode
signal for the tone
squelch.
23 D9
PWRSW Input
port for the power
switch.
24
DIO/
STOPC
STOPC Input
port for the stop mode
cancel signal.
25
Dll/
INTO
UNLK
Input port for the PLL
unlock
signal.
“High”:
PLL
unlocked
26
ROO/
INTI
BACK
UP
Input
port for the backup
signal to
save
data
before
power is turned OFF.
27 R01/
INT2
DLCK Input
ports for the channel
selector from
the dial
28 R02/
INT3
DLUP
selector.
29
R03/
INT4
DLDN
30
RIO/
TOB
BEEP
Outputs a beep tone
signal.
PIN
NUMBER
PORT
NAME
SIGNAL
NAME
DESCRIPTION
32 R12/
TOD
DIMO Outputs LCD
backlight
intensity
signals.
33 R13/
EVNB
DIM1
34 R20/
EVND
TOE Outputs
port for an enable
signal for the DTMF
encoder.
35 R21/
SCK
CK Outputs a serial
clock
signal.
36
R22/
SI
PWRON
Outputs a
power control
signal to the
power switching
circuit (MAIN unit
Q38,
Q39).
37
R23/
SO
DATA Outputs
serial
data.
38
R30/
SEG1
K1/
TONE
Outputs a strobe signal for the
key matrix.
39
R31/
SEG2
K2/
TONE
40 R32/
SEG3
11/
TONE
Outputs a strobe
signal
for the
initial matrix.
41 R33/
SEG4
12/
TONE
42—45
R40/
SEG5—
R43/
SEG8
KRO—
KR3
Input ports for the initial matrix
and key matrix.
46—57
R50/
SEG9—
R73/
SEG20
SEG9—
SEG20
Output LCD
drive signals.
90—92
COM1
—
COM3
COM1
—
COM3
Output
LCD drive signals.
3-5-2
DATA
EXPANDER (MAIN UNIT
IC9)
PIN
NUMBER
PORT
NAME
DESCRIPTION
4
AMUT Outputs an AF
amplifier
mute
signal.
“High”:
amplifier mute
5
LP1 Outputs a
transmit power control signal.
6
LP2
7
TX Outputs a
T8V control signal.
11 RMUTE
Outputs a
receive
mute
signal.
“High”:
receiving mute.
12 RX Outputs
an R8V control
signal.
14
MMUTE Outputs a
microphone mute signal.
“High”:
mic
mute.
31 R11/
TOC
PLSTB Outputs a
strobe signal to the
PLL 1C.
(MAIN unit IC1)

Icom IC-2000 Specifications

General

Brand	Icom
Model	IC-2000
Category	Transceiver
Language	English