SPECIFICATIONS FOR FLOPPY DISK DRIVES - Sharp MZ

SPECIFICATIONS FOR

FLOPPY DISK DRIVES


SMD 100 Normal Power 3 1/2 "


EPSON
EPSON-Floppy­
Laufwerk

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PAGE

1 • Scope ................................. .
5

2. General 5


General Specifications 6


.~ Detailed Specifications 9


4-1 Configuration 01 interface signals 9

4-1-1 9

. .Electrical specificationsof input signals

4-1-2 Function of' input signals 9


( 1 ) Drive select 0 J ·...... 9


(2) Hotor on ..... .. 10

..... 10

(J) Direction · ... .. 10

. .( ~ ) Step . . . . ·...... ·.... ....
....(5) H'rite gate ~ ......... ·...... 10
(6 ) Write data ... ............... .......... 10

(7 ) Side select ·........ ...........
11

(8 ) In use .......·......... ............ 11


4-1-4 Option functions 11

4-1-5
Electrical specifications of the output signals

4-1-6
Function of the output signals ·... 12

4-1-7 ( 1 ) Ready 12

(2 ) Track 00 ................ ·... 12

( J ) Index 13

13

(4) Read data 13

13

(5 ) \lri te enable 14


Timing

Track seek timing 14


Head start timing ........................ 14

Read data timing ......................... 15


2

( II ) \-Iri te start timing. 15
15

(5) Write data timing ....... 16
(6) Control data timing .................

4-2 Power supply inter~ace 17

4-2-1 Power supply specifications 17

4-2-2 Connectors 17

Power supply line ~. 1 7

Signal lines 18

4-2-) State of' wait 19

4-2-4 Connectors .. 19
19
4-3 Installation 20
5, 3.5 Flexible Disks 20
20
5-1 Appearance
5-2 Recomrnendable medium.

6. Outline Dimension Drawing .•............•.....•.....•• 21


7. Notes on Use oi' Drive 24
7-1 Power su?ply 24
7-2 Interface 24

"7-) Error rate 25
25
7-4 Caution 25
7-5 Installation of drive 25
7-6 Beat generation

8. Format ••••••••••••••• 0 •••••••••••••••••••••••••••••• 26

8-1 IBM Track Format . .. . . . . . .. . . . . . . . . . .. . . . . . . . . . . . . 26
8-2 ISO Disk Format ....... ...... . .. . .. ..... .. .... ... 26

3

1. Seope
This speeifieation applies, to SMD-l00 series (normal power consumption type)
disk drives for 3.5" flexible dlsks.

2. General
SHD-l00 series (normal power eonsumption) drives are flexible disk drives
designed to be used as external memories for personal computers, word
processors, ete. The features of the SHD-100 series drives are described
be 10Yl •
(,) Low power consumption: SMD-l00 series drives operate on only 2. lW

(wait) and 5.2W (read/write) power.
(2) Memory medium used i8 3.5 11 flexible di.sk encased in a hard cartridge er

equivalent.
(3) The disks used have a storage capacity of 500K bytes per aide (equiva­

lent to a eonventional single-sided, double-density 5.25" floppy di sk).

( 4 ) Hi gh t r ac k den si ty (1 35 TP I) (S tvt 0 - 1 4 0 . 1 3 0 )

(5) Use of oe brushless spindle drives assures long, trouble-free service

life.
(6) The head positioning meehanism employs a step motor and a steel band

enabling fast (3msee) access between tracks. (S M 0 - 1 4 0 , 1 3 0 )
(7) The interface employed is fully compatible with conventional disk qrives,

enabling easy replacement.
(8) The small aize and light weight (800g) of the SMD-l00 series drives make

thßm ideally suited to a wide variety of applications.

4

3. General Specifications

Model

Unformatted (Kbytes) FM

Memory HFM 1

ICapacity Formatted (Kbytes) ~'H 1
I (16 sectors/tracksl
I HFM I
Recording density (BPI) I FM
I HFHJ
Data transfer speed (Kbi1 /sec)
I FM I

I MFM I

Track density (TPI)

Average rotation wait time (rnsec)

Average
Settliinq time

He ad load ti.me

Total Number of tracks 160 80 80 40

Inner track radius (mm) Side 0 24.6875 24. 8 '7 5
Outer track radius (mm) side 1
Recording methods Side 0 23.1875{ 23.375
Side 1
39.50 39.50

38.00 38.00

FM/MFM

R/W head TUnnel erase type

No. of heads 22

Head positioning method Step motor

Type Direct drive
Start-up time (sec)
Spindle motor Rotation speed (rpm) 1 .0 1 .0

300 300

5

Model I I I I ISMD-140 SMD-130 SMD-120 SMD~11 0

Index detector I Noncontact detection method I

__Detector I~Tra_c_k__O_O__d_e_t_e_c_t_o__r ___________~I~N_o_n__c_o_n__t_a_c__t __d__e_t_e__c_t_i__o_n__m__e_t_h__o_d____~1

I Write enable detector I Contact detection method I
I Cartridge set detector I Contact detection method I

I IEnvironmental conditions Temperature 5 to 45°C I
1Humidity I 20 to 80% RH (non-condensinq) I
(Operating)

I Hax. we t bUl~ 29°C I
I Itempera ture I
I
I Vibration 15 to 60Hz, O.6G max.
I - IEnvironmental conditions Te mpe ra ture 2 0 t 0 65°C (- 4 0 t 0 65 ·C t r ans po r t )

(s torage and transport) Hurnidity I 95% RH max. (non-condensinq) I
Vibration I 5 to 60Hz, 3G max.
1

IPower supply +12V (+5~) Shock I SOG max.
Wait
I 60 mA (TYP)

I R/W 1 3 0 0 mA CTYP )

I Motor start 85 0 mA ( max • )

+5V (+5%) wait 280 mA (TYP)

R/W 320 mA (TYP)

420'mA (max.)

Power consumption Wai t.. 2. 1w (TYP)

Outline dimensions I R/W 5. 2 H (TYP)

Weight I 101.6mm
147.5mw
L " Width 40mm
I Designed orientations 800g
I Depth
Height Four arienta tions • .( See page 19 )
I Ins talla tion method
Screw holds on the side and lower
I panels of the disk drive are used.
I (See page 22 I Outline Dimension
Drawing. )
l 3.5 11 flexible disk. (For details, see
page 20.)
I Applicable disks
I

I

6

Model I I I ISMD-140 SMD-130 SMD-120 SMD-l10

I IRe liabi 1i ty MTBF 10, 000 POH

I I~__________~______--------~
I f MTTR
0.5h
I I~__________~______________~

I I Designed service life 5 years

I I~________~______________~

I I Sof tware error ra te Less than 1 bi t per 109

I J~__________~______________~

I I Hardware error rate Less than 1 bit per 10 '2

I _I~ _________~______________~

I I Seek error rate Less than 1 seek per 106 opera-

II tions

I I Disk service life 3 x 106 passes/track

II

Connector Power supp1y AMP 171822-4 or equivalent

Signals JAE PS-34SEo-04P1-1C/Oor equiva1ent

Front panel material ABS resin

Safety standard
(Black)


Conforms to UL standard.


7

4. Oetailed Specifications
4.1 Configuration of interface signals

Tha SMD-l00 series (low power consumption) flexible disk drives are
designed so that a maximum of 4 drives can be connected in a daisy chain
configuration. All signal input levels are ~TL compatible.
The power supply and interface require +SV and +12 V power.

4.1.1 Electrical specifications of input signals

... Low" :; TRO E VIN: OV to +O.4V
"High" FALSE I IN: 5mA ('l''iP)
VIN: +2.5V to +5.25V
IIN: OmA (open)

+sv
1
~ lk{l
D~~----------~I~[~
1438 5. 6 KO C-MOa

The terminating resistance array is set at the correct direction
(mark is inside) in the single line socket on the main unit: For the
daisy chain connection; resistance array can be only installed into
one of the (four) drives.

Tbe disk drive with the resistance array instal1ed must be charged
with current in order to operate any of the drives.

4.1.2 Function of input signals
(1) Drive select 0" 3 (080 ,... OS)}
A ll\axilnum of four S1-10-100 sel."'ies (low power consumption) disk drives
can be connected in a daisy chain configuration. Selection of the drive
numbers is performed by SSl of the DIe connector on the main PCB. When
this switch is operated, only the signals from the selected drives will
be input.

At the position MX, drive is selected no matter ~hat state of
drive select sigIlai.

8

(2) Motor ON (MON)
The spindle drive is operated when this signal is low. However, read and
write operations are only performed when the read (ROY) signal is low.
(If the dlsk cartridqe is not set in the drive, the spindle drive will
not operate.) The RDY signal goe5 low within one second after the MON
signal 15 input when a disk cartridge has been set.

(3) Direction (DRTN)
This signal determines the direction of the movement of the step motor
which controls the movement of the read/write heads. When this signal i9
low, the read/write head will move toward the . center of the disk and when
it 1s high, toward the edge of the dlsk.

(4) Step (STP)
The low pulse of this s~gnal causes the ·s t e p motor to move in the
direction indicated by the DRTN signal. The response step cycle (Ts min.)
15 3ms/track for models 140/130 and 6ms/track for models 120/110. When
the write gate signal 1s low, step 1s internally inhibited.
Wben the s'eek direction i5 reversed, the reverse step pulse must be sent
after the last pulse (Ts min + 6ettlinq :tlwe).

A: Jms(mil)
B ""6ms(mn)

I m.dmn\

A.
1 3 0)
1 1 0 )

B (SMD-120,
(5) Wri te ga te fWTG)

This signal selects between read and write data. When th1s signal 1s low,


write data 1s enabled and when high, read data 1s enabled.


Write operations to a cartridge to which a write enable cover has not

be~o affixed are internally inhibited by the disk drive.


After the WTO signal goes high, there is a 1.3ms eraae timing. Fo'r this

reason the see~ or read operation will not begin immediately.

(6) Write data (WTO)

This signal transanits the write data that is beiog written to the disk.
The fall of th1s signal from high to low causes the ~rite current flowing

through the read/write head to reverse polarity. '!his signa"l is operable

only when the write gate signal is low.

9

FM recordin9

-"+--r" O. 2511&(mh)
2. IlIs( max)

(7) Side select (SSL)
This signal selects whether the upper or lower read/write head will be
used.

(upper head)

11 HIGH" 1: Side 0 (lower head)
NOTE; This signal is used only ~ith models SMD-l'O/SMD-120.

(8) In use (IUL)
This signal is used to turn the LED on the front panel of the disk drive
on and of f. When this signal 1s low, the LED turns on and when i t i5
high, the LED turns of f •
This LED is controlled by the drive select signal as the factory-set
condi tion.

"4.1.4 Option functians
By operating the switches on the PeB of the SMD-l00 series disk.drive it is
possible to select the signal that will contral the illumination of the LED
on the front panel of the drive.

10

(1) When pin No. 1 (lU) is shorted

The tED 1s controlled by the in use signal (pin No. J2-4).


(2) When pin No. 2 (10) is shorted

The LED i5 controlled by the drive select signal.


(l) When pin No. 3 are sharted.

The LED illuminates only when the in use signal,the drive select
si,nal and motor on signal are all active.


(10 1s shorted as the factory-set condition.)


4.1.5 Electrical specifications of the output signals

SN7438(TI) or equivalent 1s used as the output drive for SHD-l00 series
disk drives.

SN " 414 '(7 "J

or .qulvalenl

HOlt Iv,tem ':" -;;: SMO-l00 leri8, dl.k drIve

dlsk drive

"Low" ;:; TRUE VIN~ +0 to +O.4V
"High" ::; FALSE I IN: 4 Qn 1\ (M AX)
VIN: +2.5 to +5.25V
I IN: OmA (open)

4.1.6 Funct10n of the output signals.

( 1) Ready (RDY)
This signal goes low to indicate that the disk cartridge has been
correctly set in the drive and 15 rotating normally. In the SMD-l00, a
detector is provided to detect the presence of the disk cartridge and to
control the ready signal.

11

(2) Track 00 (TKOO)
This signal goe.s low when the read/wri te head is in the outermost posi­
tion on the disk.

(3) Index (IDX)
One low pulse of thls signal is genera ted fQr each rotation of the disk.
The trailing edge of this pulse shows the beginning of the track.

ZOOms (nom)

0.5,....,Gms

(4) Read data (ROD)
ROD outputs the bit stream of read data fram the read circuit. This
signal i3 normally high and goes low in response to a change in the
polarity of tqe data on the disk.

4.us (0001) Bjls(nom)

--t---. . .r-1.us ± O. 35.us

(5) Write enable (WE)
This signal goes low and i3 sent to the host computer when a disk

cartridge with a wri~e enable notch is set in the disk drive.

12

4 • 1 • 7 Ti mi n9
(1) Track seek timinq

WRITE GATE
DRIVE SELECT

OIRECTlON

... 1 1- 'Jls (min) , JA:S (m ,l u) IJls (mn)
l.usernn) ......- .....--.41 I "'. (m I Il)
A 18m'(mlll)
, ß ~: 21m I (Pl 1 Il)

STEP

Ips( mh) --.J--t--' ms( mtl)

• 1 I .. A : 3 m I (ill I D)

l.9PlI(mll1 B : 6ms(mln)

A (SMD-140. 1 3 0 )
B (SMD-l 20, 1 1 0 )

(2) Read start timing

DRIVE SELECTi ~'Jls(min)
l}Js( mill)
STEP
1j.1S (m in)
WRITE GATE
VALID 1 ', ami (m l A)

AEAD DATA

--I~ A 18m. (1ll1 A)
B 21 I:q, (m 1 n)

I}J S ( IIIr1 )

A (SMD-140, 3 0 )

B (SMD-l 20, o)

13

(3) Read da ta timing

For FM ß,us(nom)
.f}As(nom) ...--~
l,us±O.35}AS
For MFM

4,us(nom) r---......-t -+-~I,us±O.JS,us
6}As(nom)
8,us(nom)
(4) Write start timing

DRIVE SELf.CT

STEP 'I)_
~--ro_ BA :: 21 81 ms (CmD, I)
WAlTE GATE inS

WAlTE OATA l}Js

(mln)

_ o f -........- 8}lS(max)


I}lS (roo)

A: tSMD-l 4 O. 1 3 0 )

(5) write data timing B : (SMD-l 2 O. 10)

For FM

8}1s:t 40n5

For MFM

±4J,lS 20ns .---~ O.25,us(mw-.)
6J,ls ± JOns --+--+-0 Z.I}l$( mal)

8J,lS ±.eOns

14

(6) Con trol da ta timi ng
When the disk cartridge has been set and the initial track position 1s

00.

-11

POWEA ON

MOTOR ON 1\

DRIVE SELECT t\ - - - - - - - - - ­
READY Il'o(m••)


., .0500


(max) ,

VALID ~)
TRACK 00

VALID 200ms(nom)

~I~s(min)~INDEX
Ic

lsec(max) I

---i-I­DIAECTION -+---~I\l
~r---r-

STEP I V• n A: 2ms(max)
WRITE GATE ~ 8: 5ms(max)
i 2 ' 11'(m )
WRITE OATA
--11'.1.,,",, \

~
I . ~t;:: ::::y
'-" s( m1n)

"' J

Bj4s(mu)

l~s(mil)

U1;L

SIDE SELECT 1IOO}J$(mln) • I ~_ 1. ~ m. (m l a)
SMD·140/120 on1v 1 ---~

)1­

VALIO !!Ul~."iI (mi
READ DATA
Ijls(mln)

A (SMD - l 4 O. 3 0 )
B (SMD-l 2 O. 1 1 0 )


15

4.2 Power supply interface
4.2.1 Power supply specifications (main PCB connector Jl)

Voltage Ripple voltage
250 mV p-p max.
+12V±5~ 100 mV p-p max.

+ 5V±57.

NOTE: Power supply voltage is that at power supply connector Jl of the main
PCB.

4.2.2 Connectors
SMO-l00 series (normal power conswnption) disk drives are connected the host

~ystem using two different connectors.

Power is supplied by apower line connected to connectors Pl and Jl.

Signal communication is performed by connectors Pl and J2.


<Power supply line> SMD·100 5erles (normal power
comumption) di5k drive
Host sYiicem
JI

+ 12\1 "nl'I<fn O. 01 u
+ 12'1
1.7

16

<Signal lines)

H<lst. 'Y118m SMO·l00 '8,iel (normal 'power
consumplion' disk drive'
L
IM USE ( IUU LI
*
4 3 1-

DRIVE SELECT 3 (OS 3 ) 6

5

INDEX (IDX) 8

1

OAiVE SELECT 0 (050 ) 10

9

DRIVE SELECT 1 (OS I ) 12

II

DRIVE SELEOT 2 (OS 2 ) 14

13

MOTOR ON (MON) 16

15

DIREOTION (DRTN) 18

11

STEP (STP) 20

19

WAlTE OATA (WTD) 22

21

WRITE GATE (WTG) 24

23

TRACK 00 (TK 00 ) 26

25

WRITE PAOTEOT (WPT) 28

27

REAO DATA (ROD) JO

29

SIOE SELECT ( SSL) J2

JI

READY (ADY) )4

33

* SMO-140/120only

17

4.2.3 Stat~ of ~ait
SED-lOO series (nornal power consumpution) is switched to power-save

mode(state of wai t) by Moter-ON si gnal (J2).

4.2. 4 Connectors
For connectors, we recommend the following:

Power supply connector Pl. RECEPTACLE AMP 171822-4 (Closed ti pe)
CONTACT PIH AHP (Oaisy ti pe)
170262-1
Signal connector P2 PS-34SEO-D4 Pl-1C

PS-34SEO-D4PI-ID

4.3 InstaUa tion

Horizontal installation Button-side Button.:.side

(the peB eide must be up) down installation up installation

lllclinod Inatallatlon

(0""30°)

18

5. 3.5 11 Flexible Disks

5.1 Appea.ra.nce

Auto 3.3(.129) 0/ /';1-]----. . "",,10

----0Ihuttor l- l
.,..- - . t-" '\
(
~' ......
\
~ \
\
,,,II \,

I :, 94 (3.10) \ Met.a) hub
.1
Wr 1 t D

L ab e 1 \.. " 1are& I ~ onablo
\

\ I h0 , 0
I
\ I ,,\

,,, ,, \ '".,

" _----_......'.... ....

...............
......-._--0 ;; ..."

/


90(3.54)

Top vlew Side Vlew Bottom vlew

.5·2 Rec·om·mend·a·ble med um .
5 . 2 •1 S 0 N Y - - - - - 0 M- 0 4 4 4 0 (ci 0 U b 1 e - s
OM-D3440 (single-s d e d)
d e d)

19

6.outline oLnension urawing r---------------~--------------

If fFill~~I-~lf -

I 1"'------3§T ~ Ii[-------.--l@1

I ~

2-N~- 3Z/JNC -4-.---+1­ / -E9- e-r-'­
I
d1,; Z - t'D i -$­
DE;rn;..6 I
I

)[

- 1 - - - - - - - - - : -1 - - ­ \­
-

lOS .~· o.Z 1

( 4. / 3" )

[l

20 N~'""'
...:~
""0
~__- - - -____- -____________________L_Jv

r.,b~-O) CS9 on

01
ZP

2'O~ 'Pb­

l

~.",
+--. .-., c::c ....
U.!
:--­ :-eu
~-
"J

"~
'-'

~', i~ -e­
.~..;JIQ,... UJ t)
-rW:\
0. a \.J't h-
~
~ ~
........ N
'-- N

-------~- I 9-H.Ld20
n.l-p 'U)
o t
NnZE-'1~-p

9-f{.l'i3o

J./-l "W

?NnZ'i-~N-Z

o

(" /.,5-/ )

7. Notes on Use of Drivos
7-1 Powor supply
7-1-1 Two power sources of' 12V and SV are required.

'fhe sequence, however, is not specified.

7-1-2 The rise timo of power supply affects the power on

or reset operation of the internal circuit. Tharafore,

tha 90% rise time of' thc SV power souree must ba

100015 or less.
The diskette is protected at power on and power
of'f'. but the write gate signal should not be
allowed to beeome active.

7-1-3 When the motor on signal becomas semi-aetive,

the standby mode is switched on and the operation

of' the R/W circuit is stopped.
7-1-4 With a nonnal type, the power supply capaeity "bocomes

maximum at the spindie motor start with 12V system and

at the maximum write action with the SV system.

7-2 Interf'ace

7-2-1 The signal system is interchangeable with the

conventional 5.25 11 system.

'rhe canne c tor. hO\-Jever. i 5 in compl iance in

des i gn l.J i t h S ONY I 5 J. 5" d r i v e •

7-2-2 Daisy chain
Up to .tour daisy chain connection is possible.
The terminating resistancc array is set :for all the
drivos at the shipment .from tho factary. Hemove
all the arrays on tho samo cablo except f'ar the one
on tho end drive.
Seleetion for each drivo, which is dane by
a short plug. should be mado caref'ully without
repetition.

22

7-2-3 Specification change

The lighting condition of the IN USE LED can be changed
by means of a short plug. Use it in a desired setting
position.

7-3 Error ratt;

The error rateof the specifications is the value with the
must be subjected to the error rate

:fa u 1 t 1 e s s dis le e t t e .

Well chosen diskettes
test.


7-4 Cauti.on

Tha drive design has taken into consideration the external

noise oi' CHT, etc. Bowever, do not use it too close to

the CRT \~ithout perfect shielding; otherwise, the Read/

Write capability of' the drive will be doteriorated.

7-5 Installation of' drive

7-5-1 Install the drive securely, usine the four screw
holes (M3, PO.5, 6 DEEP) on the drive side or the
four screw holes (M3, ~O.5. 6 DEEP) on the drive

bottom.

7-5-2 Sincc the tolüranc e of the intervals of the instal­

lation screw holes i5 ~O.2mm, ample care must bo
exercised in ensurine the positional accuracy and
bore accuracy.

7-6 Heat generation

Relative positions must be designed with such care that
th~ ambient temperature of the drive hecomes the operating
temperature of the specifications. The upper limit tem­
perature must be strictly observed particularly about the
diskette.

23

8. Format
The rEH f'ormat or the ISO f'ormat is rccommended.

8-1 ...IBM Track Forma t
~Oetce ted
n
rL
Last Sector
Sector 01 Sector 02­
'I
1--10 F;eld -1 1­ - iOata Field
) CH' IC~1l C~p SyoC IC;P )

14 0 Gap S,oc AMI 10 CRC CIP SIOC AM2 oala CRC Gap Syoc
I 1
2

lode. 10 Uall
Hark /1-&1or
Addrt,>s
Oeleled
Mark
Oah
rack
Har~
128 27 44 16
Byte 40 6 I 26 6 1 4 2 11 b r-­ 9
00 5
(Dccimal) FC' FF 00 1 2~b "2 '12 73
Single r--
512 SB 37
Density
f-

Oata Ff FW
~omaI, fC 'l '1 FF 00 or
FH' (Oala, ' J FF Fr

256 54 152 16
9
Byte J I 4 2 22 12 I­ 5

Double (Decimal) 80 12 J 1 50 12 3 I ' )12 2 84 182
r--

Densrty 1024 116 94

Data 4E 00 C2' FC 'IE 00 AI' FE '2 ,) 4E 00 AI fß (Oal.) , ) 4E 4E

[H~rm.,,) or

fB

• ThlS data byte rncludes mlsslng clock .

• -2 10 "eid
. ) CRC chech. byte

8-2 ISO Disk Format

Index ~L--_-------------------------------41r----f1-

1------ - - - - - - ­ Sector 1 Sector 2­
- ­t---ID Freld
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I DO'lble 12 12 I Data 11 4E
Deusity II
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Preamble

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• 1 : This data byte IOcludes ~ß"Density 121:l l{j 6 1R8 27 101 16
misSlng elock. 130 9
I Dovl.lle ?~6- 1"1 J)I 42
• '2 : lOaddress OClIS,ly. si"2 -16 603­ 58 ~ --5­

• ):CRC : X'~+xlJ +X' +-1 --rr-256- I)""? 372 - - I~ 266 16
~2 (i58 . ­ 84 296 Y
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Oala J <I Track

24