Icom IC-2100H

3-5
PORT
ALLOCATIONS
3-5-1
CPU
(LOGIC
UNIT
IC1)
Pin
number
Port
name
Description
1
TONEIN
nput
port for the
CTCSS
decode
sig-
nals.
9
RES Input
port
for the
reset
signal.
11 CK
Outputs
clock
signal
to
the
I/O
expander
ICs
(IC10,
MAIN
unit;
IC10),
PLL
1C (MAIN
unit; IC1),
etc.
12 DATA
Outputs
data
signals
to the
I/O
expander
ICs (IC10,
MAIN
unit; IC10),
PLL
1C (MAIN unit; IC1),
etc.
13 ESCK
Outputs
clock signal
to
the
EEPROM
(IC7).
14 ESDA
I/O
port for
the
EEPROM
(IC7)
data
signals.
16 RD Input
port for
the cloning
signal.
17 TD
Output
port for the
cloning
signal.
18
PWRSW
Input
for the
POWER
switch.
Low
: While
POWER
switch
is
pushed.
19,
20
DLCK,
DLUD
Input
ports
for
up/down
signals
from
main dial.
22 EXSTB
Outputs
strobe
signals
for
the I/O
expander
ICs
(IC10, MAIN
unit;
IC10).
23
MICIN
Input
port for
microphone
serial
sig-
nal via
the buffer
amplifier.
24 PLSTB
Outputs strobe
signals
for the
PLL
1C
(MAIN unit;
IC1).
25
E-TONE
Outputs
1750
Hz
Europe
tone
signal.
26
UNLK
Input
port for
PLL unlock
signal
from
the
PLL
1C (MAIN unit;
IC1).
High
: During
unlock
33-35
COM3-
COM1
Output LCD
drive
signals.
36-39
KRO-
KR3
Input
ports for
initial
matrix.
40
PWRON
Outputs
power
switching
circuit
con-
trol
signal.
High
;
While turning
power
ON.
41 COLOR
Outputs color
control
signal
for
display
backlight.
High : While
display
backlight
is
amber.
42,
43
DIMO,
DIM1
Outputs
brightness
control
signal
for
display
backlight.
44-75
SEG9-
SEG40
Output
LCD drive
signals.
77-88
SEG41-
SEG52
90
CTCSS
Outputs
CTCSS
signals.
91
DTMF
Outputs
DTMF
signals.
Pin
number
Port
name
Description
93
PIT
Input
port for
the
PTT
switch.
High
: While
PTT
switch
is
pushed.
94 EXTMIC
Input
port to
detect
remote
microphon
connection.
Low
:
HM-90/98
is
connected.
96 SQLV
Input
port for
squelch
setting
level
sig-
nal.
97
SQL
Input
port
for
squelch
level
signal.
99
SMET
Input
port
S-meter
level
signal.
100 MICUD
Input
ports for
up/down
signals
from
a
microphone.
3-5-2
I/O
expander
1C
(1)
IC10
(LOGIC
unit)
Pin
number
Port
name
Description
11
W/N
Outputs
receive/transmit
passband
width
control
signal.
High
:
While
narrow
bandwidth
is
selected.
([EUR],
[ITA]
only)
12
MMUTE
Outputs
MIC
mute
control
signal.
High
: While
DTMF
signals
are
out-
put,
etc.
13
AMUTE
Outputs
AF
mute
switch
(MAIN
unit;
Q28)
control
signal.
High
: While
squelched.
14
RMUTE
Outputs
detector
mute
switch
(MAIN
unit;
Q25)
control
signal.
High
:
While
squelched.
(2)
IC10
(MAIN
unit)
Pin
number
Port
name
Description
4
TX
Outputs the
T8V
regulator
(Q11,
Q12)
control
signal.
Low
:
While
transmitting
Output
RF
power
control
signals.
5,
6
7
LP1,
LP2
RF
power
High
Mid
Low
LP1
L
L
H
LP2
L
H
L
SHIFT
Outputs
TX-VCO/RX-VCO
select
sig-
nal.
14
RX
High
:
While
transmitting
Outputs
the
R8V
regulator
(Q29, Q30)
control
signal.
Low
: While
receiving
3-4
for free by
RadioAmateur.eu