Icom IC-R100 Service Manual

46
LOGIC
CIRCUITS
(LOGIC
UNIT)
The
LOGIC
UNIT
has
two
CPUs
installed
as
main
and
sub
CPUs
for
a
variety
of
operating
functions.
4-6-1
MAIN
CPU
(IC2)
PORT
ALLOCATIONS
()
INPUT
PORT
DESCRIPTION
When the port becomes
“LOW,” the CPU detects
that the [0] key has been
pushed.
When the port becomes
“LOW,” the CPU detects
that the [1] key has been
pushed.
I
|
i
P14
When the port becomes
"LOW," the CPU detects
that the [2] key has been
pushed.
When the port becomes
"LOW," the CPU detects
that the [3] key has been
pushed.
When the port becomes
"LOW," the CPU detects
that the [4] key has been
pushed.
When the port becomes
"LOW," the CPU detects
that the [5] key has been
pushed.
When the port becomes
"LOW," the CPU detects
that the [6] key has been
pushed.
When the port becomes
"LOW," the CPU detects
that the [7] key has been
pushed.
When the port becomes
"LOW," the CPU switches to
Input port for control signals
to communicate with the sub
CPU. "HIGH" voltage is
applied to the terminal every
second.
Input port for the DOWN
signal of the main dial.
Input port for the UP signal
of the main dial.
Ме
—_
ы
Р25 DUP
Input port for serial data.
K8 49 When the port becomes
"LOW," the CPU detects
that the [B] key has been
pushed.
PORT
|
PORT
PIN
NUMBER|
NAME
|NUMBER
DESCRIPTION
When the port becomes
“LOW,” the CPU detects
that the [9] key has been
pushed.
When the port becomes
"LOW," the CPU detects
that the [*] key has been
pushed.
When the port becomes
“LOW,” the CPU detects
that the [ENT] key has been
pushed.
KENT
When the port becomes
“LOW,” the CPU detects
that the [UP] key has been
KUP
- |
EES
ШЕ
~
~
>
о
When the port becomes
“LOW,” the CPU detects
that the [DOWN] key has
been pushed.
> о
When (ће port becomes
"HIGH," the CPU detects
that the receiver receives
signals.
When the port becomes
"LOW," the CPU detects
that the power switch has
been turned ON.
BUSY
When the port becomes
“LOW,” the CPU detects
that the clock switch has
CLKS
been turned ON.
P70~
VER1~
67~69
|
Used
for
selecting
a
version
P72
VER3
when
only
the
CPU
is
reset.
i
AUTO
і
When
the
рогі
becomes
“LOW,” the 9 kHz step of the
U
P75 FDN 73
TS function is selected.
This TS selection is only
possibe after the CPU has
been reset.
AFC control signal input.
When the port becomes
"LOW," AFC controls the
receive frequency for the
higher frequency
direction.
ч
L3
AFC control signal input.
When the port becomes
"LOW," AFC controls the
receive frequency for the
lower fequency direction.
74 AFC control signal input.
When the port becomes
“LOW,” the CPU detects
that the displayed frequency
(center frequency) has been
received.
P76 FONT
AID signal input. Used for
indicating signal strength on
the S-indicator.
іа
РТО SM
PT7
3

Icom IC-R100 Specifications

General

Brand	Icom
Model	IC-R100
Category	Receiver
Language	English