Icom IC-3200E - Page 13

2. Matrix
Switch
The
matrix data from the
LOGIC B UNIT
are fed to B1, B2,
and B4
on the CPU
through
SI to activate the
scan speed,
the
scan timer,
and the
memory lock
functions.
3.
Busy Matrix
for the Speech
Synthesizer
When
the speech
synthesizer
is activated,
it sends a busy
signal
to
D3, and
turns ON D1
B2 on
the main
matrix
by
means of 01 .
This alerts
the CPU
that the
synthesizer is
activated.
The CPU
waits until the busy
signal is LOW
before
continuing.
4.
BEEP Circuit
The
BEEP circuit is a phase
oscillator
consisting of IC3D, R5,
R6, R7,
C9,
Cl
0,
and Cl 1
which feeds out a
signal to 01 3
on
the
MAIN UNIT
when the
control
gate
is
HIGH.
5. DIAL
Clock Circuit
This circuit
consists of IC2,
IC3,
02,
R9,
RIO, R11, C6
and
C7,
which form the
rotary
encoder. When
turning the
encoder dial, one
shot pulses
are generated
from
IC2A.
Meanwhile,
02
generates a
HIGH or
LOW signal to
the U/D
port on the CPU
for UP or
DOWN tuning.
Also, IC2A
sends
sensor
signals to the CK
port
on the CPU.
3
—
6