-
MZ-5600
8-9-2. Signal description
Pin
No.
Signal name
In/Out
Description
Note
1
WIND
Out
1.
Clock contained in
RAW
DATA
signal and the
window
signal
output
line
used
to
distinguish the data signal (when
"i"RS=high).
2.
One-shot
multivibrator
M1
output
monitor
line
(when
"IRS-Iow).
2
DATA
Out
1.
Waveform shaped read data
output
(when
"IRS=highl.
2.
One-shot
multivibrator
M2
output
monitor
line
(when
"IRS-Iow).
3
M5C
In One-shot
multivibrator
M5
capacitor connection
pin
4
M5R
In
One-shot
multivibrator
M5
resistor and capacitor connection
pin
/'
VFOSYNC
(
5
In
Input
to
indi:t
detection
of
SYNC
byte.
When
FSHA
is
low.
gain
is
changed
ith
this signal
for
loopback.
SYNC
byte
detected when
VFO
SYNC
is
low.
SYNC
byte
not
detected
when
VFO
SYNC
is
high.
S
J!'IRX
In
Input
to
aDign
the
floppy
disk
controller
type.
As the external SYNC field
J!'IRX-Low
...
MB887S.
8877
correction
circuit
is
provided
with
FSHA
..
High ...
",.0785
the MZ-5600.
it
is
used
with
a high
state
of
"FSHA.
7
M4R
In
One-shot
multivibrator
M4
resistor and capacitor connection
pin
8
M4C
In
One-shot
multivibrator
M4
capacitor connection
pin
9
GND
In
GND
(OV)
for
all
blocks except
for
the
VCO
block
10
M2R
In
One-shot
multivibrator
M2
resistor and capacitor connection
pin
11
M2C
In
One-shot
multivibrator
M2
capacitor connection
pin
12
MFM
In
Input
line
to
aDign
two
choices
of
the
FM
and
MFM
modes
(high
for
the
FM
mode and
low
for
the
MFM
mode)
13
RD
DATA
In
Raw data
from
the
floppy
disk
C~'''';'"''
Includes
two
signal components
of
(1)
clock
signal and (2) data
signal.
14
TP1
In
IC
test
pin
When
"IRS
is
high.
loop
change
circuit
output
is
monitored.
When
"IRS
is
low.
VFO
SYNC
circuit
output
is
monitored.
15
VCC
In
5V
supply
for
all
circuit
except
the
VCO
block
16
M1R In
One-shot
multivibrator
M1 resistor and capacitor connection pin
17
M1C
In
One-shot
multivibrator
M1
capacitor connection
pin
18
TFiS
In
IC test
pin_
"iR"Shigh
when
in
connection
"~Iow
during
the
IC
test
19
j5""[j"[
Out
Charge
pump
down
output
for
low
gain
(DATA
loop)
20
P5H
Out
Charage
down
output
for
high gain (SYNC loop)
21
PUL
Out
Charge
pump
down
output
for
low
gain
(DATA
loop)
22
PUH
Out
Cherage
down
output
for
high gain (SYNC loop)
23
GLNR
In
VCO
block
GND
24
CEX1
In
VCO capacitor connection
pin
25
CEX2
In
VCO capacitor connection
pin
26
VIN
In
VCO oscillation frequency
control
voltage
input
27
VLNR
In VCO
block
supply voltage
(5V)
28
"ifTiiiiCH
In
1.
Input
to
indicate the data read source;
8"
FDD
or
5"
FDD
(I RS=high).
8
INCH=Low
... 8
INCH
FDD
8 INCH=High ... 5
INCH
FDD
-48-
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