Marantz SD9000 - Page 7

NTROL
CIRCUIT
OPERATION
|
9000
tape
deck
is
designed
to
have
a
wide
variety
tions
such
as
time
setting,
timer
setting,
program-
counter
function
and
memory
function;
all
these
omplished
by
a
single
1-chip,
4-bit
microcom-
ement
uPD546C.
;
jh
the
microcomputer
performs
complex
func-
Ne
control
circuit
is
extremely
simple.
microcomputer,
the
memory
and
control
func-
‘e
processed
together
at
high
speed
through
the
nd
timing
of
digital
pulses
available
at
input
and
terminals.
his
instruction
manual
is
limited
in
space,
it
is
ble
to
explain
in
detail
the
methods
of
measuring
icking
the
relationship
between
the
input/output
and
their
timing.
Thus,
this
manual
is
intended
»
cover
the
functions
of
operation
buttons
and
keys.
9000
has
various
types
of
keys
and
switches
to
multiple
operations,
so
special
care
should
be
yhen
it
is
necessary
to
check
the
cause
of
trouble
peration.
anual
mainly
deals
with
the
functions
of
the.
}
control
circuit.
Note
that
voltages
and
operat-
ing
given
in
this
manual
are
for
reference
pur-
nd
are
subject
to
change
according
to
changes
in
supply
voltage
and
production
tolerance
of
rents.
Lav
lovelies
et
tee
ete
Le
tates
tee
ae
ete
OS
oe
ee
eee
ee
ee
tothe
ee
2.
Microcomputer
Terminal
arrangement
(front
view)
Oo oOnN DoF WwW NY
uPD546C
a701
CLO.1:
Clock
oscillator
LC
(external)
PE3-0:
Output
port
E3-0
INT:
Interrupt
RES:
Reset
PF3-0:
Output
port
F3-0
PA3-0:
Input
port
A3-0
PG3-0:
Output
port
G3-0
PB3-0:
Input
port
A3-0
PH3-0:
Output
port
H3-0
PC3-0:
!nput/output
port
C3-0
P1I2-0:
Output
port
12-0
PD3-0:
Input/output
port
D3-0
TEST:
Test
Fig.
2.1
Terminal
arrangement
(front
view)
agram
ae
GexeazzaT
Coe
_INSTRUCTION-BUS_Bbit
JC]
H
Ly
Kaba
:
GF
(LLLLIZ
LL)
DECODER
ale
Ye-Bus
g
DPi
CZZZE,
i)
yal
y
CONTROL
a
LLL
IL
ZZ
4
y
DECODE
ROM
g
Y
:
20008
4
l
<—]
F
QLZZZZZZZ
EY
|
y
:
Y
(ZZZZ
LY)
Y
RAM
1
yy
96x
4
y
=|
|
CLLLZLZ
LL
4
y
ZA
LLL
y
[=
=e
—
a
y,
<—~y
RAM
4
0k
g
BUFFER|
4
PT]
|
Y
14.
are
y
Ks
2
4
v1
Cc
KE
g
=
4bit
4
cS
al
ZZZZZ)
PLLA
LLLLLLLLE
|
_sTACKO
CONTROL
INTERFACE
=>p[
To
[store]
A
—
INT
RES
DP:
Data
pointer
ALU:
Operation
unit
ACC:
Accumulator
PC:
Program
counter
Block
diagram
Cc:
Carry
F/F
C’:
Carry
F/F
Table
2.1
Functions
of
input/output
signals
No.
|
Signal
Function
Description
Remarks
1
cli
Clock
1
Pin
1
on
clock
oscillator
LC
2
PCO
E.
3
PC1
Input/output
F.
:
7
.
Not
used
as
input
4
PC?
port
C
G.
Keyboard
strobe
signal
and
7-segment
lamp
signal
terminal.
5
PC3
H.
6
INT
Interrupt
input
Counter
pulse
input
(detects
tape
end)
7
RES
Reset
input
Initial
reset
input
8
PDO
A.
7
5
9
PD1
Input/output
at
Operation
button
strobe
aaa
Paaeminasinel
No
used
as
input
0
nes
port
D
.
Keyboard
strobe
signal
terminal.
*
Lamp
signal,
PM,
ERROR
lamp
strobe
signal
12
|
PEO
(4)
SELECTOR
controt
signal
ERROR
Pesaran
13.
|
PEI
Output
(3)
PROGRAM
MODE
control
signal
lamp
signal
Hit
arabe
14
PE2
port
E
(2)
COUNTER
MEMORY
control
signal
~
py
lamp
si
a
15
|
PES
(1)
TIMER
control
signal
signal
9
16
PFO
TIMER
ON
LED
famp
signal
17
PF1
TIMER
OFF
LED
lamp
signal
18
PF2
Output
port
F
REC
LED
lamp
signal
19
PF3
PRG
PAUSE
LED
lamp
signal
20
TEST
Test
input
Not
used;
connected
to
Vss
21
Vss
Power
supply
+10V
41V
22
PGO
TIMER
ON
signal
23
PG1
TIMER
LED
lamp
signal
24
|
pG2
|
OutputportG
|
pan
LED
lamp
signal
25
PG3.
SAM
LED
lamp
signal
26
PHO
FAST
27
PH1
FF
28
PH2
Output
port
H
REW
=
eS.
C/R
(CUE/REVIEW}
Tape
deck
operation
mode
control
30
|
Pio
PAUSE
ane
31
Plt
Output
port
|
PLAY
32
PI2
REC
EB
a)
iS
aaa
|
33
PAO
Power
frequency
select
signal
.
34
PA1
Power
sync
signal
35°
PA2
input
pore
A
Program
detect
signal
36
PA3
Time
display
select
signal
37
PBO
4.
38
PB1
3.
5
ee
39
PB2
Input
port
B
2
Program
signal
operation
signal
40
PBS
1.
}—_;
41
|
Veo
GND ov
42
CLO
Clock
0
Pin 0 on clock oscillator LC
_t
Control
signal
input
circuit
Fig.
2.3
Control
signal
input
circuit
Q419
Q420
Too2
pee
ee
eae
wool
=
|
2
1
Buck
up
+10V
AC
IN
Without
signal
+12V
ie)
+20v
(\
Program
With
signal
(OV)
WA
RMIS
detect
signal
R424
Q424
R587
$003
:
60
50
fe]
o
O
C518
R589
5
l
|
Input
portA
I
,
Q70l
j~PD546C
!
i
4
Sine
wave
‘?
aT
3,2Vpp/400
kHz
Q582
C525
|C526
—
10.2V
—
l2v