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RC-999 II
CIRCUIT DESCRIPTION
SLAVE MICROPROCESSOR 7507HG-517-22
1. General
This
microprocessor
is used
to control
the
cassette
mechanism
(D40-0341-05) based on the instructions from
the Master
microprocessor.
In addition to the mechanism
control, the Slave microprocessor also performs:
@ Slide pocket control (ON/OFF using diode switch).
®
Door shutter contro! (ON/OFF using diode switch).
®
Contro!
outputs
for Dolby,
dbx,
reproduce
equalizer
time constant switching and reproduce amplifier switch-
ing (based on the data from the Master).
The
Master
microprocessor
gives
instructions
to
the
Slave
microprocessor
by
serial
data
transmission,
The
microprocessors are connected via six signal lines.
2. Data Communications
For the data communications, refer to the description of
the Master microprocessor.
3. Terminal Description
3-1. Terminal configuration diagram
On
Z2er
O
O72 O71 0 TO
KO
K1
K2
K3
NR
DOLBY B/C
dbx
METAL ©
MAINMO©)
MAIN MG) ©
Oooh
wn
=
ae
mMowon
NC
SLIDE
MG@)
0
SLIDEM
Qo
CL10
RESET
©
20
4PD7507HG
(SLAVE
MICROPROCESSOR)
{MASTER
MICROPROCESSOR)
M-—S REQ
SCK
SCK
S16)
Sl
Ss]
so
SCK REQ
SCK REQ
S>MREQ
S>M
REQ
-
Oo
a0
oo
zz
a4
omomrd
An wW
caf
238i
Saal
000 0
0 T-ADV
SOLENOID
32
31
30
29
28
OREW
Vpop
©
M--S
REQ
O
soo
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