Shugart SA810 Specifikace Strana 1

Mechanical Dimensions Width = 8.55 in (217 mm) Height = 2.31 in (59 mm) Depth = 12.00 in (305 mm) Weight = 7lbs (3 kg) Mounting Top loading Diskette

1.3.2 Drive Mechanism The Head Positioning Actuator moves the read/write head{s} to the desired track on the diskette. The head{s} is loaded onto the

READ DATA -SEP DATA (FM) READ WRITE LOGIC f.--. PROTECT SEP CLOCK (FM) ASSM ~ DRIVE SIDE SELECT SELECT DISKETTE WRITE DATA .. . WRITE GATE -WRITE WRIT

In the standard configuration, the host system turns off the motor by deactivating the DRIVE SELECT line. This should be done if the drive has not re

DC POWER I ~ --------------~l~l---------------DRIVE SELECT I DIRECTION SELECT ___ 1 ___ _ ~ --1~1:1 .s r----I ------_ ... ' ----OUT ~-------

1.4.8 Read Operation Reading data from the SA810/860 drive is accomplished by: a. Activating DRIVE SELECT line. b. Selecting head (SA860 only). c.

In both of these encoding schemes, clock bits are written at the start of their respective bit cells and data bits at the center of their bit cells.

1.4.10 Sequence Of Events The timing diagram shown in figure 1-9 illustrates the necessary sequence of events with associated timing restric-tions fo

SECTION II ELECTRICAL INTERFACE 2.1 INTRODUCTION The interface of the SA810/860 Diskette Drive can be divided into two categories: a. Signal b. Power

HOST ~ DC -~.fT. GND -=-FRAME GND MAX FEET 10 FT FLAT RIBBON OR 20 FT TWISTED PAIR EXTERNAL WRITE CURRENT SWITCHING' TRUE READY' TWO SIDED&

TABLE OF CONTENTS Page TABLEOFCONTENTS ... i LIST OF FIGURES ...

The input circuit lines have the following electrical specifications. See figure 2-2 for the recommended circuit. True = Logical zero = Vin ± 0.0

2.2.5 Direction Select This interface line is a control signal which defines the direction of motion the read/write heads will take when the STEP line

2.2.12 Output Lines There are nine standard output lines from the SA810/860 with two optional output lines and two alternate outputs available. The ou

If a single sided diskette is installed, READY will be active (logical zero) when SIDE a is selected, but false (logical-one) when SIDE 1 is sele

2.4 FRAME GROUNDING The drive must be frame grounded to the host system to ensure proper operation. If the frame of the drive is not fastened directl

3.1 INTRODUCTION SECTION III PHYSICAL INTERFACE The electrical interface between the SA810 or SA860 and the host system is via two connectors. The fir

TABLE 3·1. RECOMMENDED J1 CONNECTORS TYPE OF CABLE MANUFACTURER CONNECTOR PIN CONTACT PIN TWISTED PAIR, #18 AMP (CRIMP OR SOLDER) TWISTED PAIR, #1

SECTION IV DRIVE PHYSICAL SPECIFICATIONS 4.1 INTRODUCTION This section describes the mechanical dimensions and mounting recommendations for the SA810

0.47 ± 0.03 f (11.94 ± 0.76 mm) --. ...--I 0.33 ± 0.01 - I (8.38 :!: 0.25 mm) LI I \ ~I Q o 101 0 2.31 ± 0.03 ... -_-:_-_-___ I_-_-__ LJ

TABLE OF CONTENTS (CONT.) 2.3 Power Interface ... 2-6 2.4 Frame Grounding ...

5.1 WRITE ERRORS SECTION V ERROR RECOVERY If an error occurs during a write operation, it will be detected on the next revolution by doing a read ope

SECTION VI RECORDING FORMAT 6.1 RECORDING FORMAT (SINGLE DENSITY) The format of the data recorded on the diskette is totally a function of the host co

6.1.2 Byte A byte, when referring to serial data (being written onto or read from the disk drive), is defined as eight consecutive bit cells. The most

6.3 RULES OF ENCODING 6.3.1 FM Encoding: a. Writes data bits at the center of the bit cell. b. Writes clock bits at the leading edge of the bit c

BIT 0 0 0 CELLS 0 I I I 12F I D D D 1F D D FM -1::01-4p,sec " " ~ " " ~ / / " / ~ ~ / ~ / " I BIT. I I I o I ~ 1 1 1 0

~ _____ I_ND_E_X ________________________________________________________________ _ MFM 10416 BYTES ----------------... REPEAT FOR EACH RECORD ----

Data Field -Sync is a fixed number of bytes for separator synchronization prior to the address mark. In-cludes a minimum of two bytes plus worst c

C D D D D D D C BIT ~ELL I BIT ~ELL I BIT ~ELL BIT ~ELL I BIT ~ELL I BIT ~ELL I BIT iELL ~-----------------------INDEXADDRESSMARK----------------~---

D D C C D Jl n n n rL BIT CELL BIT CELL BIT ~ELL I BIT ~ELL I BIT ~ELL I BIT ~ELL I BIT ~ELL I BIT CELL 0 1 7 PRE ADDRESS MARK BINARY HEXADECIMAL

Figure Number Title LIST OF FIGURES Page 1-1 SA810/860 Half-Height Floppy Disk Drive ... 1-0 1-2 SA810/860 Functional Di

D D D D D D D BIT ~ELL I BIT ~ELL I BIT ~ELL I BIT iELL I BIT ~ELL I BIT ~ELL I BIT ~ELL I BIT ?ELL I"'~ __ -----------DATA ADDRESS MARK --

SECTION VII CUSTOMER INSTALLABLE OPTIONS 7.1 INTRODUCTION The SA810/860 Can be modified by the user to function differently than the standard method o

TABLE 7·1. CUSTOMER CUT/ADD TRACE OPTIONS TRACE SHIPPED FROM FACTORY DESIGNATOR DESCRIPTION OPEN SHORT U9 TERMINATIONS FOR MULTIPLEXED INPUTS PLUGGED

.. / R84 0 .. ~rn [}grn [}grn R~Il:;; ~ ~~ . <To Cl3 R,I RSZ CZ4 ~==============~----------------~ .o:mt---_-----4II}1111111I111~1(J~ C54 RI7 RI5 -

Rl8-c=J-~ iO fI= lJ =~ i==t RlO =t==i= ( , RS9 -B-D / CRI7 .. @I ... . FIGURE 7·2. PCB COMPONENT LOCATIONS (PIN 25249) 7-4

7.2 EXTERNAL WRITE CURRENT SWITCH This option permits write current switching via the optional WRITE CURRENT SWITCHING interface line (pin 2). When t

+ 5V o a Q D--------t 12 C h..-__ --II..-... _--*_ -DISK CHG -READY -DRVSEL~----------------~------------~~>--------~ 39216·23 FIGURE 7·5. DISK C

+5V 1 -DRIVE 18 SELECT 2 28 3 38 DRIVE SELECTINT 4 48 S3 FIGURE 7·7. SIDE SELECTION USING DRIVE SELECT 7.7 IN USE ALTERNATE INPUT -SIDE 0 CT -SIDE 1

-DHIVE SELECT 4 --*)(------3-2----~r~--1 -DRIVE SELECT 3 --*)f------3-0-----~~1t---li -DRIVE SELECT 2 --l)~( ----:-:------I~+-I----+r---ll. -DRIVE SEL

LIST OF TABLES Table Number Title Page 2-1 DC Power Requirements ... 2-7 3-1 Recommended Jl Connectors .

-DRIVE SELECT 4 x 32 -DRIVE SELECT 3 )( 30 -DRIVE SELECT 2 )( 28 -DRIVE SELECT 1 OPTIONAL SIDE SELECT FROM DRIVE SELECT ALTERNATEJ 1/0 PINS ~ -MOTOR

+5V RR + DRIVE SELECT 2:...--•• ."./'}.II~--*"-...,--"-~~"""""" R 22 D----------------1~/~/~.~---

8.1 INTRODUCTION SECTION VIII OPERATION PROCEDURES The SA810/860 was designed for ease of operator use to facilitate a wide range of operator oriented

When removed from the drive, the diskette is stored in an envelope. To protect the diskette, the same care and handling procedures specified for co

SECTION IX PACKAGING It is suggested that packing material be kept in case the unit must be returned to Shugart for repair. Regardless, the unit must

42 UNITS/PALLET 39216·34 FIGURE 9·2. PALLET LOADING 9-2

APPENDIX A MACHINE LEVEL CODE INFORMATION Table A-I identifies distinct features or exceptions to the general description of the SA810/860 in this man

APPENDIX B ORDERING INFORMATION Table B-1 can be used to construct a part number for a unique drive configuration. AB 68 AB 69 PRODUCT LINE 810 PR

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Shugart 475 Oakmead Parkway Sunnyvale, CA 94086 Technical Publications Suggestion Form We would appreciate your comments and suggestions for improving

FIGURE 1.1. SA810/860 HALF·HEIGHT FLOPPY DISK DRIVE 1·0

1.1 GENERAL DESCRIPTION SECTION I INTRODUCTION The compact SA810 single-sided and SA860 double-sided half-height 8-inch floppy disk drives offer a rel

IBM Format (128 byte sectors) Per Disk Per Surface Per Track Transfer Rate Latency (average) Access Time Track to Track Settle Time One Track Seek &a