
M K - 2 7 2 0 F C    TOSHIBA
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders    2920|     |     |
Capacity form/unform  1296/      MB        Heads          10|     |     |
Seek time   / track  13.0/ 3.0 ms          Sector/track     |     |     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer           128 KB READ-AHEAD   Landing Zone
Data transfer rate    5.000 MB/S int       Bytes/Sector      512
                     16.600 MB/S ext PIO1
Recording method     PRML 8/9                       operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -20 60
Power: sleep          0.2 W     Humidity     %         8 80    |      8 80
       standby        0.4 W     Altitude    km    -0.300  3.000| -0.400 15.000
       idle           1.8 W     Shock        g                 |
       seek           4.5 W     Rotation   RPM      4200
       read/write     3.4 W     Acoustic   dBA        36
       spin-up        7.5 W     ECC        Bit   168BIT,ON THE FLY
                                MTBF         h     300000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,TUV,UL1950               

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                        L   A   Y   O   U   T
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TOSHIBA  MK2720FC  PRODUCT SPECIFICATION 71Y102821  20/07/1995








                                                    +-J2 MASTER/SLAVE
      43--------------------------------------------+1+-+
      |* * * * * * * * * * * * * * * * * * * * * * *|*|*|
   ---+* * * * * * * * * * * *   * * * * * * * * * *|*|*+-----
      44-----------------------+--------------------+2+-J1 RESERVED
                               |                    +-+
                        Polarity Key







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                      J   U   M   P   E   R   S
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TOSHIBA  MK2720FC  PRODUCT SPECIFICATION 71Y102821  20/07/95

 Jumper Setting
 ==============

 Master/Slave Configuration
 --------------------------
 By using the CSEL pin (PIN 28) and the optional jumper J2 beside the
 interface connector, two units can be connected on a cable in a daisy
 chain.

 When J2 is open, the drive runs as master drive. When J2 is closed,
 it acts as slave drive. In

 In case of two drive connection, one should be a master and another
 should be a slave. In case of single drive connection, it should be
 defined as master.

 Both master and slave drive are allocated onto same I/O area and
 identified by Drive bit in DRVH register. Host system writes into
 register on both drives but reads register only from a selected
 drive.

 Only the selected drive can execute the command except Diagnose
 command. Diagnose is executed on both drives and the result of slave
 drive is transferred to master drive through PDIAG line. Master
 drive reports both results to host system.


 Interface Pin 28 -CSEL
 ----------------------
 Same function as Option Jumper J2 is provided onto this line.
 Definition of Master/Slave should be done either by this pin or J2.
 If J2 is plugged for Master, this line does not affect to the
 definition. This selection is done by Toshiba Specific command.



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                      I   N   S   T   A   L   L
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TOSHIBA  MK2720FC  PRODUCT SPECIFICATION 71Y102821  20/07/1995

 Notes On Installation
 =====================

 Installation
 ------------
 The drive should be mounted carefully on the surface of 0.1 mm
 flatness or less to avoid excessive distortion. It is recommended
 the space greater than 1 mm is kept under the PCB and it is important
 to check enough for safe design to prevent short- circuit under any
 circumstances. Enough room to avoid any mechanical interference
 when receiving shock or vibration is required especially around the
 convex portion in the HDA. The temperature of the top cover and the
 base must be kept under 60*C at any moment to maintain the desired
 reliability.

 The M3 mounting screw holes are tapped directly on the aluminium
 portion of HDA for electrical ground. The other are tapped on the
 plastic portion for electrical insulation. Screw holes for mounting
 can be determined by the evaluation results of the electromagnetic
 noise emitted from the host system to drive. The breathing hole
 should be kept open after mounting. A maximum force of 2N should be
 allowed on the top cover to avoid the drive damage.


 Screwing
 --------
 Four screws should be tightened equally with 0.3N.m (3 kgf.cm)
 torque. The depth should be 3.0 mm min. 3.5mm maximum.


 Cable Connection
 ----------------
 +------------------------+---------------------------------------+
 |Interface Connector     |                                       |
 |Drive side connector    |   Yamaichi GAP050K11617               |
 +------------------------+---------------------------------------+


 Cable
 Twisted pair type cable is recommended as follows:
 Standard diameter           0.32mm (28 AWG)
 Characteristic impedance    100-132

 Cable length and capacitance
 0.46 MAX. 35pF MAX.


 Grounding
 ---------
 HDA (Head Disk Assembly) and DC ground (ground pins on interface)
 are electrically connected each other.



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                      F   E   A   T   U   R   E  S
**********************************************************************
TOSHIBA  MK-2720FC  PRODUCT SPECIFICATION 71Y102821  20/07/1995

 General Description
 -------------------
 The MK2720FC comprises a series of intelligent disk drives,
 hereinafter referred to as the MK2720FC or simply as the drive.

 The drive features an ATA-2 interface embedded controller that
 requires a simplified adapter board for interfacing to an AT or AT
 compatible bus. The drives employ Winchester technology and a cloosed
 loop servo control system to realize recording density of 711kbit/
 mm  (459 Mbit/inch ) and average access time of 13 msec with highest
 reliability of 300,000 hours for MTTF (Mean Time to Failure).

 It features smallest and lightest drive with 19mm height half foot-
 print of market standard 3.5" type micro FDD and 220 grams of weight.

 The MK2720FC consists of an HDA (Head Disk Assembly) and a printed
 circuit board. The HDA is a sealed module and contains a disk
 spindle assembly, a head actuator assembly and an air filtration
 system. Reliability is enhanced through the use of Winchester
 technology. The actuator is a rotary voice coil motor and provides
 high-speed access.

 The disk is driven directly by a DC spindle motor. Air filtration is
 provided by means of a high performance air filtration system using
 both breather and circulation filters.

 The drive provides a carriage lock mechanism which is activated
 automatically upon power is down, thus preventing head/media damage
 during non-operating or transportation conditions.

 The printed circuit board is located externally to the HDA and
 contains all the electric circuitry necessary to operate the drive
 except the head drivers. This board contains the power supply and
 interface signal connectors. Only the head control IC's are located
 within the HDA. The circuitry perform the following functions:

 Read/Write, Task File Control, Spindle Motor Control, Seek and Head
 Positioning Servo Control, Abnormal Condition Detection and Shock
 Sensor Control.


 Some Key Features
 -----------------
 - Quick spin up of Spindle Motor 5sec.

 - Average access time of 13 msec realized by optimized balance of a
   heead actuator assembly and an efficiently designed magnet of
   Rotary VCM.

 - Read ahead cache and write cache enhancing system throughput.

 - Fail-safe power down return heads to landing zone with automatic
   carriage lock realized high immunity to operating shock 2,000 m/s .


