CMD TECHNOLOGY, INC.
====================

   CRD-5300-001, CRD-5300-002, CRD-5300-003

   Card Type           Hard drive controller card                 
   Processor           RISC                                       
   Maximum Onboard     128MB DRAM                                 
   Memory              
   Hard Drives         Fourteen Fast SCSI devices (5300-001)      
   supported                                                      
                       Fourteen Fast/Wide SCSI devices (5300-002) 
                                                                  
                       Fourteen Fast/Wide SCSI devices (5300-003) 
   Floppy drives       None                                       
   supported           
   Data Bus            Fast/Wide SCSI (5300-001)                  
                                                                  
                       Fast/Wide SCSI (5300-002)                  
                                                                  
                       Fast/Wide/Differential SCSI (5300-003)     
   Form-factor         3.5 inch                                   
   RAID levels         0, 1, 0+1, 4 and 5, JBOD                   
   supported           

<gopher://bitreich.org/I/th99/c/C-D/21488-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | Proprietary SCSI/serial/power connector to back |   CN1    |
   | plane                                           |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DRAM CONFIGURATION                      |
   |------------------------------------------------------------|
   |           Size            |              DRAM              |
   |---------------------------+--------------------------------|
   |            4MB            |           (1) 1 x 36           |
   |---------------------------+--------------------------------|
   |            8MB            |           (1) 2 x 36           |
   |---------------------------+--------------------------------|
   |           16MB            |           (1) 4 x 36           |
   |---------------------------+--------------------------------|
   |           32MB            |           (1) 8 x 36           |
   |---------------------------+--------------------------------|
   |           64MB            |          (1) 16 x 36           |
   |---------------------------+--------------------------------|
   |           128MB           |          (1) 32 x 36           |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/C-D/21488-2.png>
   

   Back plane

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Location  |  Function   | Location  |
   |----------------------+-----------+-------------+-----------|
   | Front panel          |    CN1    | Power       |    CN6    |
   | connector - future   |           | connector - |           |
   | use                  |           | battery     |           |
   |----------------------+-----------+-------------+-----------|
   | 68-pin SCSI          |    CN2    | Termination |   TPWR    |
   | connector - host in  |           | power       |           |
   |----------------------+-----------+-------------+-----------|
   | 68-pin SCSI          |    CN3    | Main power  |   MPWR    |
   | connector - host out |           |             |           |
   |----------------------+-----------+-------------+-----------|
   | 50/68-pin SCSI       |    CN4    | 3-pin       |   UART    |
   | connector - channel  |           | connector - |           |
   | 1                    |           | UART        |           |
   |----------------------+-----------+-------------+-----------|
   | 50/68-pin SCSI       |    CN5    |             |           |
   | connector - channel  |           |             |           |
   | 0                    |           |             |           |
   |------------------------------------------------------------|
   |      Note: Connectors CN4 and CN5 differ on each model     |
   |      (see header). Controller plugs into back of back      |
   |      plane.                                                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                USER CONFIGURABLE SETTINGS                  |
   |------------------------------------------------------------|
   |                Function                 | Label | Position |
   |-----------------------------------------+-------+----------|
   |>> | Factory configured - do not alter   |  TST  |   N/A    |
   |   | (manufacturer's test)               |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Battery connected to battery        |  W1   |   Open   |
   |   | connector (CN6)                     |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Battery connector (CN6) disabled    |  W1   |  Closed  |
   |---+-------------------------------------+-------+----------|
   |>> | Factory configured - do not alter   |  W2   |   Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |        J11 PIN-OUT (ENVIRONMENTAL CONTROL SYSTEM)          |
   |------------------------------------------------------------|
   |    Pin    |   Description    |    Pin    |   Description   |
   |-----------+------------------+-----------+-----------------|
   |     1     |      Ground      |     3     |       VCC       |
   |-----------+------------------+-----------+-----------------|
   |     2     |       Data       |     4     |       CLK       |
   |------------------------------------------------------------|
   | Note: This connector will be implemented in future         |
   | firmware releases.                                         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |        J12 PIN-OUT (UNINTERRUPTIBLE POWER SOURCE)          |
   |------------------------------------------------------------|
   |  Pin   |       Description       |  Pin   |  Description   |
   |--------+-------------------------+--------+----------------|
   |   1    |    Loss of AC power     |   3    |     Ground     |
   |--------+-------------------------+--------+----------------|
   |   2    |   Low battery warning   |        |                |
   |------------------------------------------------------------|
   | Note: This connector allows signals from an                |
   | uninterruptible power source to be sent to CRD-5300.       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         J13 PIN-OUT (EXTERNAL TEMPERATURE SENSOR)          |
   |------------------------------------------------------------|
   |    Pin    |    Description    |   Pin    |   Description   |
   |-----------+-------------------+----------+-----------------|
   |     1     |       Power       |    3     |     Ground      |
   |-----------+-------------------+----------+-----------------|
   |     2     |     External      |          |                 |
   |------------------------------------------------------------|
   | Note: This connector allows an external temperature sensor |
   | to replace Q1 on the back panel.                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | The CRD-5300 will not operate without an attached battery  |
   | back-up or an uninterruptible power supply. Also,          |
   | terminating drive buses by installing on-board resistors   |
   | is not recommended because the end drive on the bus cannot |
   | be removed during a "hot swap" without leaving the bus     |
   | unterminated.                                              |
   +------------------------------------------------------------+