Table of Contents
Advertisement
9. CIRCUIT DESCRIPTION
9.1
CONTROL SECTION |
Reet
MUrEs
Peet
Talker and listener
System
Controller
PD4050B
e System Outline
The system controller(PD4050B)
deck controller (PD4022B),
and tuner controller(PD4046B) are inter-connected by 8-bit
serial data transfer. The three signal lines are the data line
(SD), serial clock line (SCK), and the CS line between the
system controller and display controller. The system, deck,
and tuner controllers are switched automatically to talker
and listener according
to the timing indicated in Fig.14.
The
display
controller
is a listener only which
receives
80-bit serial data inputs from the system controller via the
CS signal
line.
Data
transfer
between
controllers
is ex-
ecuted by switching the system, deck, and tuner control-
(T)
System Controller
(L)
u
i
(T)
Tuner Controller
:
H
'
H
t
Display Controller
(L)
|
Fig. 13 System diagram
"——Max
2sec.——»
BS
ee
Tea
Talker and listener
Deck
Controller
PD40228
Talker and listener
Tuner
Controller
PD40468
Listener
Display
Pp
Controtler
ve
lers to talker and listener on a cyclic basis (as indicated in
Fig. 14). If no command output is received from the deck
and tuner controller within two seconds after output of a
command
from
the
system
controller,
a
reset
output
command
is subsequently
generated by the system
con-
troller.
This
is then
followed
by output of a standby
command,
resulting
in both
the tuner and
deck
being
switched
off. The deck and tuner controllers which have
received
the reset command
from
the system
controller
have been set to become listeners at any time. The standby
command
from the system controller is this received under
these conditions.
(T =talker,
L = listener)
Y = TYP. 5msec.
N
Ny
AN
N
Fig. 14 Talker/listener switching timing
12
Advertisement
Table of Contents
