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Summary of Contents for SA410

Page 1: ...SA41 0 460 96TPI Single Double sided Minifloppy Diskette Storage Drives Shugart uuu 3 i ...

Page 2: ... SHUGART 1981 ALL RIGHTS RESERVED ...

Page 3: ...A460 Only 5 3 6 Read Operation 5 3 7 Write Operation 8 3 8 Sequence of Events 8 4 0 Electrical Interface 10 4 1 Signal Interface 11 4 1 1 InputLines 11 4 1 1 1 Input Line Terminations 12 4 1 1 2 Drive Select 1 4 12 4 1 1 3 MotorOn 12 4 1 1 4 Direction Select 13 4 1 1 5 Step 13 4 1 1 6 Write Gate 13 4 1 1 7 Write Data 13 4 1 1 8 Side Select SA460 Only 14 4 1 1 9 In Use Option 14 4 1 2 Output Lines ...

Page 4: ...rack Layout 23 7 3 1 2 Hard Sectored Recording Format 23 8 0 Customer Installable Options 25 8 1 Drive Select 27 8 2 The Door Lock Solenoid fOption 28 8 3 Side Select 29 8 4 Drive Status 30 8 5 Write Protect 31 9 0 Operation Procedures 32 9 1 Minidiskette Loading 32 9 2 Minidiskette Handling 32 10 0 Installation of Packaging Materials 33 ...

Page 5: ...ex Sector Timing SA117 or SA167 Media 15 17 Read Data Timing FM 15 18 Interface Connectors Physical Locations 17 19 Jl Connector Dimensions 18 20 J2 Connector 18 21 Physical Dimensions 19 22 Recommended Mounting 20 23 Byte FM Encoding 21 24 Data Bytes 21 25 Recommended Soft Sector Single Density FM Even Boundaries 22 26 MFM Recommended Format 256 Bytes 16 Records Per Track IBM Type 22 27 Recommend...

Page 6: ...FIGURE 1 SA410 460 96 TPI MINIFLOPPYS IV ...

Page 7: ... PROTECT i u R W HEAD ASSM R WO DRIVE R W1 SELECT o DOOR CLOSE SWITCH CONTROL LOGIC STEP v DIRECTION SELECT TRACK 00 SENSOR INDEX SECTOR DETECTOR DRIVE SELECT MOTOR ON IN USE DOOR LOCK _ IN USE LED TRACKOO s hNDEX SECTOR r f DRIVE STATUS DRIVE y MOTOR JL i V T DOOR I OOK SA460 ONLY SOLENOID OPTION FIGURE 2 SA41 0 460 FUNCTIONAL DIAGRAM ...

Page 8: ... storage personal computer systems and other applications where low cost higher capacity random access data storage is required The SA410 460 offers the most cost effective data storage of any flexible media disk drive Key Features 96 Track per inch Precise HeliCam Actuator 0 5 1 MByte unformatted capacity SA400 450 I O compatibility Same compact size and weight as the SA400 450 similar to most ta...

Page 9: ...6 1 C 40 to 144 F 40 C to 62 C Relative Humidity 20 to 80 1 to 95 Maximum Wet Bulb 78 F 25 6 C no condensation Storage 8 Fto 117 F 22 C to 47 C 1 to 95 no condensation DC Voltage Requirements 12V 5 1 3A typical 2 2A MAX 5V 5 0 5A typical 0 7A MAX Mechanical Dimensions exclusive of front panel Width 5 75 in 146 1mm Height 3 25 in 82 6mm Depth 8 25 in 205mm Weight 3 lbs 3 ozs 1 44 Kg Nominal Power D...

Page 10: ...a ball follower which is attached to the head carriage assembly Precise track location is accomplished as the lead screw is rotated in discrete increments by a stepping motor 2 4 Read Write Head s The glass bonded ceramic and ferrite read write head s contain tunnel erase elements to provide erased areas bet ween data tracks Thus normal interchange tolerances between media and drives will not degr...

Page 11: ... to allow the motor to come up to speed before reading or writing can be accomplished The motor must be turned off by the host system by deactivating the MOTOR ON line This should be done if the drive has not received a new command within two 2 seconds 10 revolutions of diskette after completing the ex ecution of a command This will insure maximum motor and media life Note All motors in a daisy ch...

Page 12: ...n the side surface of the diskette A minus logic level selects the side 1 read write head When switching from one side to the other A 200 xs delay is required after SIDE SELECT changes state before a read or write operation can be initiated Side select should not change state for a minimum of 1 1 msec after write gate is terminated Figure 4 shows the use of SIDE SELECT prior to a read operation 3 ...

Page 13: ...IN 1_ i i 2 s MAX 200 MS MAX 21 MS MIN ff r f f U Tf juuuuir 1 1 MS MIN 1 1 MSEC MIN ITU FIGURE 4 READ INITIATE TIMING READ DATA 4 0 iS NOM 4 0 tS NOM LTU U A LEADING EDGE OF BIT MAY BE 800 ns FROM ITS NOMINAL POSITION B LEADING EDGE OF BIT MAY BE 400 ns FROM ITS NOMINAL POSITION FIGURE 5 READ DATA TIMING FM ...

Page 14: ...MS P BIT CELLS 1 1 1 1 1 C C CD n n n_n__ 8 00 s JDDD D CC D mfm i p n n n n_n n_ FIGURE 6 FM AND MFM CODE COMPARISONS MOTOR ON DRIVE SELECT STEP WRITE GATE WRITE DATA SIDE SELECT 500 NS MIN 8 00 s MAX uu u irLi 8 00 s MAX iy h 1 1 MS MIN FIGURE 7 WRITE INITIATE TIMING ...

Page 15: ...The timing relationships required to initiate a Write Data sequence are shown in Figure 7 These timing specifica tions are required in order to guarantee that the read write head s position has stabilized prior to writing Drive select or side select SA460 may not change nor a step command be issued for a minimum of 1 1 msec after write gate is returned to an inactive state refer to paragraph 4 1 1...

Page 16: ...SIDE SELECT SA460ONLY 200 MS MIN if 500 ns MIN 500 ns MAX 1 1 MS MIN A t 200 MS MAX 500 ns MAX M 19 6 MS MIN VsMIN Vs MIN 21 MS MIN Vs MIN 1f 5 5 MS MIN 500 ns MIN 200 MS MIN 200Ms MIN 21 MS MIN 21 MS MIN 8 s MAX W innr 9 ITU 2 iS MAX 200 MS MAX 200 xS MIN f uL 11 MS MIN 1 1 MS MIN LTLT 1 1 MS MIN FIGURE 9 GENERAL CONTROL AND DATA TIMING REQUIREMENTS ...

Page 17: ...STEM DRIVE DOOR LOCK OPTION 2 J1 1 i3 I 5 i 7 i 9 i 11 i 13 i 15 17 19 21 23 25 i 27 i 29 I 31 i 33 FLAT RIBBON OR TWISTED PAIR TWISTED PAIR IN USE 4 DRIVE SELECT 4 6 INDEX SECTOR 8 DRIVE SELECT 1 10 DRIVE SELECT 2 12 DRIVE SELECT 3 14 MOTOR ON 16 DIRECTION SELECT 18 STEP 20 WRITE DATA _ 22 WRITE GATE 24 _ TRACK 00 26 WRITE PROTECT 28 READ DATA 30 SIDE SELECT SA460 ONLY w 32 _ DRIVE STATUS 34 5VDC...

Page 18: ...those signals which are not multiplexed and affect all the drives in a daisy chain system The input signals to be multiplexed are 1 DIRECTION SELECT 2 STEP 3 WRITE DATA 4 WRITE GATE 5 SIDE SELECT SA460 only The input signals which are intended to do the multiplexing are 1 DRIVE SELECT 1 2 DRIVE SELECT 2 3 DRIVE SELECT 3 4 DRIVE SELECT 4 The signals which are not multiplexed are IN USE and MOTOR ON...

Page 19: ...TEM MX shorting plug installed With the MS shorting plug installed DRIVE SELECT when activated to a logical zero level will turn the motor on With MX shorted the I O lines are always enabled MULTIPLE DRIVE SYSTEM MX shorting plug not installed Four separate input lines DRIVE SELECT 1 DRIVE SELECT 2 DRIVE SELECT 3 and DRIVE SELECT 4 are provided so that up to four drives in a multiplexed system may...

Page 20: ... for 5 5 ms minimum between adjacent pulses Each subsequent pulse must be delayed by 6 ms minimum from the preceeding pulse The access motion is initiated on each logical zero to logical one transition or the trailing edge of the signal pulse Any change in the DIRECTION SELECT line must be made at least lfis before the trailing edge of the STEP pulse the DIRECTION SELECT logic level must be mainta...

Page 21: ...and the stepper is locked on track This signal is at a logical one level or inactive state when the drive s read write heads are not at track zero When the drive s read write heads are at track zero and an additional step out pulse is issued to the drive a mechanical stop will keep the read write heads at track zero 4 1 2 2 Index Sector This interface signal is provided by the drive each time an i...

Page 22: ...M 4 0 s NOM 4 0 S NOM LI u LI U I u B B A LEADING EDGE OF BIT MAY BE 800 ns FROM ITS NOMINAL POSITION B LEADING EDGE OF BIT MAY BE 400 ns FROM ITS NOMINAL POSITION FIGURE 17 READ DATA TIMING FM 4 1 2 4 Write Protect This interface signal is provided by the drive to give the user an indication when a Write Protected Diskette is install ed The signal is logical zero level when it is protected with l...

Page 23: ...ystems the current requirements are a multiple of the maximum current times the number of drives in the system P2PIN DC VOLTAGE TOLERANCE MAX RIPPLE p to p 1 12VDC 0 6VDC 2 20 A MAX 1 3 A TYP 1 00 mV max allowable 2 12 Return 3 5 Return 4 5VDC 0 25 70A MAX 50A TYP TYPICAL CURRENT REQUIREMENT AMPS POWER ON MOTOR START MOTOR RUNNING DOOR LOCK STEP WRITE STAND BY 12 VOLTS f 5 VOLTS TABLE 1 DC POWER R...

Page 24: ...83717 5 AMP P N 641737 1 P2 CONNECTOR AMP P N 1 480424 0 FRAME GROUND AMP P N 61664 1 FIGURE 18 INTERFACE CONNECTORS PHYSICAL LOCATIONS 5 1 Jl Pl Connector Connection to J 1 is through a 34 pin PCB edge connector The dimensions for this connector are shown in Figure 19 The pins are numbered 1 through 34 with the even numbered pins on the component side of the PCB and the odd numbered pins on the n...

Page 25: ...e of the PCB Wire used should be 18 AWG Figure 20 illustrates J2 connector as seen on PCB from the rear of the drive FIGURE 20 J2 CONNECTOR 5 3 Frame Grounding The drive must be frame grounded to the host system to insure proper operation If the frame of the drive is not fastened directly to the frame of the host system with a good AC ground a wire from the system AC frame ground must be connected...

Page 26: ...MINI PCB 834 050 4X 2 12 13 Mounting Holes 4 on bottom 2 on each side 6 32 x 25 DP MIN 8X 63 FIGURE 21 PHYSICAL DIMENSIONS 19 ...

Page 27: ...e 21 for dimensions of the SA410 460 6 2 Mounting As shipped from the factory the drive is capable of being mounted in one of the following positions 1 Top Loading mounted upright 2 Front Loading mounted vertical with door opening left or right mounted horizontal with PCB up DO NOT HORIZONTAL MOUNT WITH PCB DOWN RECOMMENDED NOT RECOMMENDED FIGURE 22 RECOMMENDED MOUNTING 20 ...

Page 28: ...ast Correspondingly the most significant byte of data is transferred to the disk first and the least significant byte is transferred last When data is being read back from the drive bit cell of each byte will be transferred first with bit cell 7 last As with reading the most significant byte will be transferred first from the drive to the user Figure 23 illustrates the relationship of the bits wit...

Page 29: ...FEED LU GAP 2 SYNC I AM DATA FIELD i I WG DATA I CRC I OFF FF 00 s USER DATA 128 256 512 1024 2048 m FF GAP 3 FF 26 19 70 499 J GAP 4 FF 101 69 54 5 1032 NOTES 1 Track Number Head Number Sector Number Sector Length 2 IBM or Equivalent CRC Generator 3 FB for Data or F8 for Deleted Data FIGURE 25 RECOMMENDED SOFT SECTOR SINGLE DENSITY FM EVEN BOUNDARIES n NUMBER OF BYTES HEX BYTE UPDATE WRITE GAP 1 ...

Page 30: ... an update write Data Field Sync is a fixed number of bytes for Separator synchroniztion prior to the AM Includes a minimum of two bytes plus worst case separator sync up requirements Pre Data Address Mark MFM Three bytes of Al with unique clock bits not written per the encode rules Data Address Mark FM is a unique byte to identify the Data Field and it is not written per the encode rules Data Add...

Page 31: ...S 128 36 10 RECORDS 256 25 MFM FF OB m s HEX BYTE AA AA NUMBER OF BYTES 16 6 1 4 2 16 RECORDS 256 101 10 RECORDS 512 79 UPDATE WRITE NOTES 1 Track Number Head Number Record Number Record Length 2 User Data 3 Generated by CRC Generator IBM or Equivalent FIGURE 27 RECOMMENDED HARD SECTOR FM AND MFM FORMATS 24 ...

Page 32: ... from IN USE or DRIVE SELECT 3 SIDE SELECT using DIRECTION SELECT 4 DRIVE STATUS 5 WRITE PROTECT TRACE DESIGNATOR DESCRIPTION SHIPPED FROM FACTORY OPEN SHORT U3 Terminations for Multiplexed Standard Inputs plugged DS1 DRIVE SELECT 1 input line plugged DS2 3 4 DRIVE SELECT 2 3 4 input lines X MX DRIVE SELECT Enabled Single Drive System X MS MOTOR ON From DRIVE SELECT X SS Standard SIDE SELECT plugg...

Page 33: ...FIGURE 28 COMPONENT LOCATIONS 26 ...

Page 34: ...ipped is in position DS1 The SA410 460 is configured to operate alone in a single drive system It can be easily modified to operate with other drives in a daisy chained multiplexed multiple drive system This is done by selecting specific drive address and jumpering the appropriate DRIVE SELECT line The MX option is used for single drive systems By shorting MX the I O lines are always enabled The M...

Page 35: ...FROM IN USE OR DRIVE SELECT 8 2 The Door Lock Solenoid Option The Door Lock Solenoid can be activated by the interface line provided on PIN 2 The DA option allows the Door Lock Solenoid to be activated when the IN USE or DRIVE SELECT Signal has been asserted to a logic zero 28 ...

Page 36: ...IDE SELECT function can be controlled via the DIRECTION SELECT line if desired With this option the DIRECTION SELECT line controls the direction of head motion during stepping operations and controls side head selection during read write operations To implement this option simply move jumper SS to location SD 29 ...

Page 37: ...en sensed since the previous conditions were met If the DRIVE STATUS signal is inactive the user may deselect and then select the drive to test DRIVE STATUS again if the door had previously been disturbed condition b was not met but is now closed DRIVE STATUS WILL ACTIVATE upon sensing an INDEX SECTOR pulse Condition b may optionally be eliminated by cutting trace DD and shorting trace DO Conditio...

Page 38: ... Protected Diskette is install ed The signal is logical zero level when it is protected with label over notch Under normal operation the drive will inhibit writing with a protected diskette installed in addition to notifying the interface If the WP trace is cut writing to the diskette is inhibited unless a label is installed over the notch 31 ...

Page 39: ...netic tape apply These precautionary procedures are as follows 1 Return the diskette to its storage envelope whenever it is removed from drive 2 Do not bend or fold the diskette 3 Store diskettes not for immediate use in their box 4 Keep diskettes away from magnetic fields and from ferromagnetic materials which might become magnetiz ed Strong magnetic fields can distort recorded data on the disk 5...

Page 40: ...riage stop should be removed and retained They must be reinstalled prior to any further shipment of the drive To prepare a drive for shipment A Locate the head carriage at Track 00 B Insert the carriage stop as you would a diskette with the tab under the head carriage see Figure 34 C Install the door retainer by sliding the center section with the tabs nearest the PCB into the door pin slots and b...

Page 41: ...FIGURE 35 DOOR RETAINER 34 ...

Page 42: ...CAUTION SHEET FOAM PAD PCB LID CONTAINER BASE CONTAINER FIGURE 36 DRIVE CONTAINER 35 ...

Page 43: ...DRIVE CONTAINER SIDE PAD CARD BOARD CONTAINER FIGURE 37 SHIPPING CONTAINER 36 ...

Page 44: ...39024 0 1 Product SA410 460 Pub Date 9 80 6 81 Pub Type OEM Subject J2 pin designations Figure 20 page 20 P N 39024 0 and page 18 P N 39024 1 shows pin numbers in reverse order Make ink corrections to the figures as follows Page 20 P N 39024 0 INCORRECT 12 VDC CORRECT 5VDC Page 18 P N 39024 1 INCORRECT 12VDC CORRECT D 5VDC ...

Page 45: ... Shugart Copyright 1977 475 Oakmead Parkway Sunnyvale California 94086 Telephone 408 733 0100 TWX 910 339 9355 SHUGART SUVL P N 39024 1 6 81 PRINTED IN US A ...

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