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M Z-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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