
P H D - 1 0 0 0   P O R T A B L E    WESTERN DIGITAL
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3"/SUPERSLIMLINE      Cylinders        | 2100|     |
Capacity form/unform  1083/      MB        Heads           4|   16|     |
Seek time   / track  14.0/ 4.0 ms          Sector/track     |   63|     |
Controller           PCMIDE 50-PIN         Precompensation
Cache/Buffer           128 KB DRAM         Landing Zone
Data transfer rate    4.000 MB/S int       Bytes/Sector      512
                     16.600 MB/S ext PIO4
Recording method     GCR8/9PRML                     operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 60
Power: sleep          0.1 W     Humidity     %         8 85    |      5 95
       standby        0.2 W     Altitude    km    -0.300  3.000| -0.300 12.000
       idle           0.9 W     Shock        g       100       |    300
       seek           3.0 W     Rotation   RPM      4536
       read/write     3.0 W     Acoustic   dBA        43
       spin-up        5.0 W     ECC        Bit   REED SOLOMON,SMART
                                MTBF         h     300000
                                Warranty Month        36
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC950,ISO9001,TUV...

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WESTERN  PHD1000  TECHNICAL REFERENCE GUIDE 2/12/96  79-860022-000

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  |                                                         1  26
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       Drive Connector
       +--------------------------------------------------1--+
       |25* * * * * * * * * * * * * * * * * * * * * * * * *  |
       ++ * * * * * * * * * * * * * * * * * * * * * * * * * ++
        +50-----------------------------------------------26+

 24 = VCC1 5V
 49 = VCC2 5V
 41 = CSEL (Cable Select)
 23 = DASP- (Drive Active/Slave Present



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WESTERN  PHD1000  TECHNICAL REFERENCE MANUAL 79-860022-000  2/12/96

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

 Drive Configuration
 -------------------
 All configurations of the WD Portfolio drive use CSEL line to
 dictate the master or slave drive identify.

 The drive address is 0 (Master or Single) if CSEL is low, or 1
 (Slave) if CSEL is high.

 NOTE
 The WD Portfolio drive autodetects whether it is a master or slave
 when CSEL is driven low.



 Drive Active/Slave Present
 --------------------------
 Pin 23
 This open collector output is a time-multiplexed signal indicating
 drive active or slave present. At reset, this signal is an output
 from the slave drive and an input to the master drive, showing that
 a slave drive is present. For all times other than reset, DASP- is
 asserted by the master and slave drives during command execution.



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WESTERN  PHD1000  TECHNICAL REFERENCE GUIDE 2/12/97 79-860022-000

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


 Connectors
 -----------
 Mating connector:   AMP P/N 146375-1 or equivalent.


 Host Connector Pin Lengths
 --------------------------
 The following are recommended pin lengths for the host connector.

 - Long (0.197 inch / 5.0 mm)

 - Medium (0.167 inch 4.25 mm)

 - Short (0.138 inch / 3.5 mm)

 Long pins are used for power and ground pins. Medium pins are used
 for all of the standard IDE interface pins. Short pins are used for
 Device Enable, Insert-, and Lock-.



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WESTERN  PHD1000  TECHNICAL REFERENCE MANUAL 79-860022-000 2/12/96


 General Description
 -------------------
 The WD Portfolio Enhanced IDE hard drive provides 1.0 GB of formatted
 storage in a revolutionary low-profile (10.5 mm high) 3-inch form
 factor. It is a versatile, low-cost storage solution - ideal for use
 in full-size and slimline notebooks.

 The WD Portfolio hard drive redefines the concept of upgradable
 storage. Unlike other hard drives, all of the WD Portfolio's
 electronics are encased in a sealed system, which means you no
 longer have to worry about damage caused by electro-static discharge
 (ESD).


