Port Allocations - Icom IC-2100H Service Manual

3-5 PORT ALLOCATIONS

3·5'-1 CPU (LOGIC UNIT IC1)
Port
Pin
number name
nput port f o r the
TONEIN
1
nals.
RES Input port for the reset signal.
9
Outputs clock signal
expander ICs (IC10 , MAIN unit; IC10 ),
11 CK
PLL I C ( MAIN unit; IC1 ), etc.
Outputs data sig nals to the
DATA expander ICs (IC10 , MAIN unit;
12
PLL IC (MAIN unit; IC1), etc.
Outputs clock signal to the EEPROM
13 ESCK
(IC?) .
1/0 port for the EEPROM (IC?) data
1 4 ESDA
sig nals.
16 R D Input port for the cloning signal.
Output port for the cloning signal.
T D
17
Input for the POWER switch.
P WRSW Low : While
18
Input ports for up/down signals from
DLCK,
19,20
DLUO main dial.
Outputs strobe signals for the 1 / 0
EXSTB
22
expander ICs (IC10 , MAIN unit; IC10).
Input port for microphone serial sig -
MICIN
23
nal via the buffer a mpli fier.
Outputs strobe signals for the PLL IC
24 PLSTB
( MAIN unit; I C 1).
E-TON E Outputs 1750 Hz Europe tone sig nal.
2 5
Input port for PLL unlock signal from
the PLL IC ( MAIN unit; IC1).
U N LK
26
High : Dur i n g unlock
33-35 COM3-
Output L C D drive sig nals.
COM1
KAO-
3&-39
Input ports for initial matrix.
KR3
Outputs power switching circuit con-
40 PWRON
trol signal.
High : While turning power ON.
Outputs col o r control signal for display
COLOR
41 back lig ht.
High : While display back light
OI MO, Outputs brightness control signal for
42,43
DIM1
display backlight.
SEG9-
44 -75
SEG40
Output LCD drive sig nals.
SEG41-
77-88
SEG52
cress
Outputs CTCSS sig nals.
90
Outputs DT M F sig nals.
91 DT M F
Description
cress
decode sig-
to the 1/0
1/0
IC10),
PO WER
switch
pushed.
a mber.
Pin Port
number name
PTT
93
94 EXTMIC
S L V
9 6 Q
97 SQL
S MET
99
MICUD
100
3-5--2 VO expander IC
(1) IC10 (LOGIC unit)
Pin Port
is number name
11 WIN
12 M M UTE
13 A M UTE
14 A MUTE
(2) IC10 (MAIN unit)
Pin Port
number name
4
TX
is
L P1,
5, 6
LP2
7 SHIFT
1 4 RX
3-4
Description
Input port for the PTT sw i t ch.
High : While PTT switch I s pushed.
Input port to detect remote microphon
connection.
L ow : H M-90/ 9 8 is connected.
Input port for squelch setting level sig-
nal.
Input port for squelch level sig nal.
Input port $- meter level sig nal.
Input ports for up /down signals from a
microphone.
Description
Outputs receive /trans mit passband
width control signal.
High : While narrow bandwidth is
se l e cted. ([EUR], [ITA] only)
Outputs MIC mute control sig nal.
High : While DTMF signals are out-
put, etc.
Outputs AF mute swit ch ( MAIN unit;
Q28) control signal.
High : While squelched.
Outputs detector mute switch (MAIN
unit; Q25) control signal.
High : While squelched.
·
Description
(0
Outputs the T8V reg ulator
control sig nal.
Low : While transmitting
Output RF power control sig nals.
L
LP1
l H
LP2
Outputs TX-VCO /RX-VCO select sig-
naf.
High : While trans mitting
Outputs the RSV reg ulator (Q29, Q30)
control signal.
Low : While receiving
11 , 012)
l