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STUDER REVOX
REVOX IR REMOTE CONTROL SYSTEMS
E 1/3
1.3
FUNCTIONAL
DESCRIPTION
The
voltage
(+5 V and GND)
for the 8203
»
Timer
Con-
troller
is supplied
via
the
connecting
cable
for
unit
1.
A
C-MOS
microprocessor
(IC9)
operating
in
the
so-called
expanded
mode
is responsible
for all
control
functions.
The
control
program
is stored
in a 16K x
8
bit
EPROM
(1¢13).
The
programmed
data
are
held
in a 2K x 8 bit
CMOS
RAM
CIC7).
Buffer
batteries
supply
the
clock
chip
(IC15)
and
its RAM
(timer
data)
in the event
of a power
faiture.
The
eight
bidirectional
signals
are
taken
to the
Line drivers
IC4)
via
a separate
microprocessor
port.
The LC display
with
integrated
decoder
Logic
is controlled
directly
by the
address/data
bus.
The
control
commands
for
the
parallel
remote
control
output
B77/B710
are
taken
from the
internal
system
bus via
a
buffer
CIC16)
to the optocouplers
(DLQ1/DLQ2)
in
order
(1c3,
REAL TIME
lib] cock
MODULE
BATTERY
BACKUP
DISPLAY
MODULE
8 x ORIVER
INTERFACE
AV
OPTICALLY
COUPLED
SERTAL
LINK
PARALLEL
REMOTE
to
isolate
the potentials.
+24 V control
logic.)
Up
to 3 external
IR receivers
(B206
+» Transceiver)
can be
connected
in parallel
to the
internal
IR input.
With
the
jumper
JS1,.
input A can be configured
as an output
for an
IR transmitter
adapter.
In this
case
all
received
IR data
are
looped
directly
to the transmitter.
(The
B77
tape
recorder
has
a
Incoming
IR
signals
are
received
by
the
IR
photodiode
(DP1)
and processed
by the IR receiver
(IC17).
The timer
(1C18)
controls
the red pilot
LED
(DL1)
in
the
receiver
window which
acknowledges
incoming
IR signals.
Communication
with
the MPU
is possible
via the buffered
RS
232 serial
interface
and via two separate
ports.
A
voltage
converter
(IC12)
supplies
the
interface
with
+9 V and -5 V DC.
MPU
HD63A03
4.9152 MHz
LEVEL
INTERFACE
VOLTAGE
CONVERTER
DRIVER FOR
IR~TRANSMITTER
INFRARED
RECEIVER
EXT. POWER
5 voc
INFRARED
COMMAND
COMMAND
RECEIVED
EXTERNAL
3-WIRE
IR-RECEIVERS
COMMUNICATION
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