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Tandon TM848-1E Specification And User Manual

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PRODUCT SPE /IFICATION AND USER'S MANUAL

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Summary of Contents for Tandon TM848-1E

  • Page 1 TN84%5 48-2E FLEXISLK 9I8g j%)RIVES M J' 4 i l PRODUCT SPE /IFICATION AND USER'S MANUAL...
  • Page 2 , w i t h out t h e p r ior w r i t t e n a pproval of Tandon Corporation.
  • Page 3 T HIN L I N E ™ FL E X I B L E D ISK DR I V E 48 TRACKS PER INCH PRODUCT SPECIFICATION AND USER'S MANUAL lclll d D I 1 CORPORATION 20320 PRAIRIE STREET CHATSWORTH, CALIFORNIA 91311 o COPYRIGHT 1983 TANDON CORPORATION...

  • Page 4: Table Of Contents

    CONTENTS Page Section Number Number Title SECTION 1 G E N E R A L D E S C R IPTION Introduction Scope Of The Document ..... . . Purpose Of The Drive Major Features Microprocessor Control...
  • Page 5 Section Page Number Title Number 3-14 Diskettes 3-14 Loading The Diskette 3-14 Write Protect Yab . Diskette Handling and Storage 3-17 ILLUSTRATIONS FIGURES Figure Page Number Title Number Disk Drive Disk Drive Outline Drawing +24 Volt D. C. Current, Configuration 1 + 24 Volt D.

  • Page 6: Introduction

    They m a y b e i n s t a l led i n o ne-half th e s pace norm all y r e q u i red fo r a n The TM848-1E and T M 8 48-2E drives featur e eight-inch drive. They are compact data stor- age devices that use an IBM -f ormatt ed, indus- an onboard microprocessor.

  • Page 7: Internal Trim Erase

    INTERNAL TRIM ERASE n ormal o p erati on. E ac h d r i v e c o n sists o f a direct drive, spindle system, a head positioning system, and a read/write system. The drive provides the control signals neces- T he T M 8 4 8-1E i s a s i n g l e-sided d r i ve.

  • Page 8: Power On Self- Tests

    light source and a phototransistor, posi- O pening an d c l o s in g t h e d i s k e tt e l e v e r i s t ioned to g en erate a s i g na l w h e n a n required to repeat a t est t ha t ha s f a i l ed.
  • Page 9 ~>GURp y.y OISK Qp]yp...

  • Page 10: Product Specifications

    PRODUCT SPECIFICATIONS INTRODUCTION This section contains the mechanical, electrical, reliabili ty, and environmental specifications for the TM848-1E and TM848-2E drives. 2.1 M E C HANICAL SPECIFICATIONS Figure 2-1 contains the physical dimensions of the drive. 2.2 ELECTRICAL AND O P E R ATIONAL SPECIFICATIONS The electrical and operational specifications are located in Table 2-1.

  • Page 11: Disk Drive Outline Drawing

    6-32 THD THRU 4 PLCS (2 EACH SIDE) / 0.149 DIA TOP X 1 2.00 0.156 DIA BOTTOM ' (304.8 MM) X 0.430 DEEP 4 PLCS 8.00 (203.2 MM) • 3.50 (88.9 MM) 1.20 (30.5 MM) 0.75 ~ 1.650 (19.0 MM) (25.4 MM) (41.5 MM) 1.60...

  • Page 12: Electrical And Operational Specifications

    Media Life (for reference only) 3 x 10 passes per track Tracks Per Inch 48 TPI, both drives Tracks Per Drive TM848-1E 77 tracks per drive TM848-2E 154 tracks per drive, 77 per side 0.529 millimeter, 20.8 milinches Track Spacing...
  • Page 13 4 00 mi l l i a m p e r e s 130 milliamperes Electronics Power Dissipation 20 watts, typical Shipment When prepared for shipment by Tandon, the drive meets the requirements of NSTA preshipment test procedure Project 1A. 1 7904 9 - 0 0 1 REV. A...

  • Page 14: Volt D. C. Current, Configuration

    Configured for stepper motor enabled during motor start, 2.25 amps typical surge. TiME IN MiLLISECONDS FIGURE 2-2 +24 VOLT D. C. CURRENT, CONFIGURATION 1 Configured for stepper motor disabled until motor comes up to speed, 1.8 amps typical surge. STEPPER MOTOR ENABLED TIME IN MILLISECONDS FIGURE 2-3...

  • Page 15: Reliability Specifications

    TABLE 2-2 RELIABILITY SPECIFICATIONS Error Rates, maximum, exclusive of external sources, e.g.: electronics, defective and contaminated diskettes Soft Errors (Recoverable) O ne in 10 bi t s Hard Errors (Nonrecoverable) O ne in 10 b i t s Seek Errors One in 10 seeks Mean Time Between Failures 10,000 power-on hours...

  • Page 16: Operation

    , i n s t a ll , a n d o p er at e t h e TM848-1E and TM848-2E drives. 5. E n sure that the circuit board is secure. 6 . E n sure t ha t t h e connectors are fi r m l y 3.1 U N PACKING THE DRIVE...

  • Page 17: Dust Cover

    DUST COVER A ll i n t e r f ac e s i g n al s a r e T T L c o m p a t i b l e . Logic true (low) is + 0 . 4 volt m a x i m um . Logic f alse (high) is + 2.4 volts mini m u m .

  • Page 18: Drive Interface Lines And Pin Assignments

    T ABLE 3 - 1 D RIVE INTERFAC E L INES A N D P I N A S S I G N M E N T S Ground Signal Write Current Switch Motor On Control 1 3 5 7 Motor On Control 2 True Ready, (Motor On Control 3, Optional) Two Sided (Strappable) (TM848-2E only)
  • Page 19 ~ 0.1 percent. The Side Select int er f ace line, available only on Tandon's TM848-2E, defines which side of Host controllers may implement write precom- a two-sided di skett e i s u s e d f o r r e a d in g o r w riting.

  • Page 20: Output Control Lines

    Ready is false (high) if side one is selected on which is nominally four mi l l i seconds. t he TM848-1E. When a t w o -sided diskette i s installed, Ready is active when either side of the diskette is selected on the TM848-2E.

  • Page 21: Typical Interface Characteristics

    NOTE TYPICAL INTERFACE CHARACTERISTICS T his i s a st r a p p a bl e f e a t u r e w ith th e M o tor Control 3 i n p u t signal line. Lines between the controller and the drive have the following characteristics: DISK CHANGE...

  • Page 22: Control And Data Timing Requirements

    D. C. POWER 90 MILLISECONDS MINIMUM VALID CONTROL OUTPUT SIGNALS 500 NIINOSECO N D S MAX IMUM DRIVE SELECT SIDE SELECT (TM848-2E ONLY) 100 MICROSECONDS MAXIMUM DIRECTION 1 MICROSECO N D SELECT 1 MICROSECOND MINIMUM MINIMUM 1 MICROSECON D 1 MICROSECOND MINIMUM MINIMUM 13 MILLISECOND STEP...

  • Page 23: Drive Address And Option Strapping

    supplied, i s A M P P a r t N u m b e r 1 - 4 8 0270-0, time. Drive Select is implemented by shorting using AM P c o n t ac t P ar t N u m b e r 6 0 6 1 91-1. o ne of the f our connections, using a shorti n g Pin assignments are found in Table 3-2.

  • Page 24: Option Patching

    TABLE 3-3 OPTION PATCHING As Shipped Trace Option Designator Installed Installed Drive Select DS1 — DS4 DS2 — DS4 S1 — S3 Head Select S1, S3 1B — 4B Head Select Using Drive Select Power Save Stepper Power From Head Load Line Spindle Motor Control Ml, M3, M4 M1, M3...

  • Page 25: Stepper Motor Power (Ps, Ps*, Ds, Hl)

    HEAD SELECT USING DIRECTION SELECT During a Read or Write operation, the state of the Direction Select line is undefined. Hence, it may be used to select the desired head. A high enables Head 0. A low enables Head 1. To incorporate this o ption, etch cut S2 and install Sl .

  • Page 26: Lsi Circuit Board Assembly

    M C2 MOTOR CONTROL Motor Control signals are low (true) active. Motor Control signals are high (true) active. Motor Control selected via J1-4. Motor Control selected via J1-6. Motor Control selected via J1-8. Motor Control selected via J1-24. 4S Ooo DS4 3S OOO DS 3 2S Ooo DS2 I S oOO DS I...

  • Page 27: Non-Lsi Circuit Board Assembly

    4 B 0 0 0 D S4 3 B 0 0 0 D S 3 2 B 00 0 D S 2 I B 00 0 D S I 0 0 S 3 0 MOH 0 MDL 0 0 2 S 0 0 M C 4 0 0 M C 3 M C 2...

  • Page 28: Ready And True Ready (R And Tr)

    READY AND TRUE READY (R AND TR) DISK CHANGE (DC) T his outpu t i s u s e d t o i n d i c at e t o t h e c o n - When th e R j u m p e r i s i n s t a l l ed, th e R eady troller that a disk change has been made.

  • Page 29: Write Current Switch (Xc And Ic)

    T o implement th e I C o p t i on, r emove the X C jumper, then install a jumper at IC. The TM848-1E and T M 8 4 8-2E dr i ves use an I BM-compatible, e i g h t - i nc h d i s k e t te . D i s k -...
  • Page 30 TABLE 3-4 DIAGNOSTIC MODE OF OPERATION Test Description of Test Seek to Track 0, and turn on spindle motor. This t e st seeks the carriage to Tr ack 0, and tu rn s on the spindle motor. It may be used to check the Track 0 status. Seek to Track 1, and turn on spindle motor.
  • Page 31 TABLE 3-4 (CONTINUED) DIAGNOSTIC MODE OF OPERATION Test Description of Test 10/A Monitor the write protect sensor. T his test c hecks t h e write protect sensor. The front panel L.E.D. should tur n on and off by moving a disk, which has the write protect notch covered, in and out of th e d r i ve.

  • Page 32: Diskette Handling And Storage

    S.O INCH SEALED PROTECTIVE JACKET INDEX HOLE OXIDE COATED SPINDLE MYLAR DISK ACCESS HOLE LINER HEAD APERTURE WRITE PROTECT NOTCH FIGURE 3-5 RECORDING MEDIA W hen th e s l o t i s c o v ered w i t h a n o p t i c a l l y and to enhance the service life of the diskette, o paque, self-adhesive tab, the diskette is writ e the following handling procedure should be...

  • Page 33: Diskette Care And Handling

    RETURN THE DISKETTE DO NOT WRITE ON THE TO AVOID DA MAG E TO D O NOT TOU C H P R EC I - THE DISKETTE AND TO TO ITS J ACKET WHEN JACKET WITH PEN OR S ION S U RFACE W I T H YOUR DRIVE, I NSERT NOT IN USE.
  • Page 34 CORPORATE OFFICES 20320 PRAIRIE STREET CHATSWORTH, CA 91311 TELEPHONE NO.: (213) 993-6644 TELEX NO.: 194794 TWX NO.: 910-494-1721 PRINTED IN U.S.A. P/N 179049.001A (T5007A 5-83)

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Tm848-2e

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