Fujitsu M2652S/M2654S:Switch Settings

PCA Layout   All configurations marked "*" are default settings

Terminal CN3

Set SCSI ID
        5-6     3-4     1-2    ID
        OPEN*	OPEN*	OPEN*	0
        OPEN	OPEN	SHORT	1
        OPEN	SHORT	OPEN	2
        OPEN	SHORT	SHORT	3
        SHORT	OPEN	OPEN	4
        SHORT	OPEN	SHORT	5
        SHORT	SHORT	OPEN	6
        SHORT	SHORT	SHORT	7
NOTE :The drive is shipped from the factory with the SCSI ID set to 0. but
the links are offset, this is done intentionally as it will enable the user
to configure the drive with enough shorting straps for any ID.  It must be
remembered though that the host adapter normally takes ID 7 with all
peripheral devices using IDs 0 through to 6

        7-8     SHORT*  SCSI PORT Enabled
                OPEN	SCSI PORT Disabled
        9-10	OPEN	Reserved
        11      N/C     KEY
        13-14	OPEN*	External LED connection
        15-16	SHORT*  Write protection disabled
                OPEN	Write protection enabled
        17-18	SHORT*  Normal operational mode
                OPEN	Self-diagnostic mode
        19-20	OPEN*	Drive reset.
                This can be useful for debug purposes.  Under normal
                conditions this should not be shorted; a momentary switch
                mounted on an external panel would be more suitable.

Connector CN5

        Factory use only.

Connector CN6

        Spindle synchronisation connection

Connector CNH1

LED display requirement
        1-2     SHORT*  LED active when drive connected to bus
                OPEN	LED active when drive READY
SCSI level
        3-4     SHORT*  SCSI-2
                OPEN	SCSI-1 (Common Command Set)
Synchronous Data Transfer Mode
        5-6     SHORT*  Initiation from drive (TARG)
                OPEN	Initiation from host (INIT)
RESELECTION phase and ACK signal wait time monitoring
        7-8     SHORT*  Executed
                OPEN	Not executed
SCSI time monitoring
        9-10	11-12	ACK signal wait time	RESELECTION monitoring
                                                and number of retries
        SHORT*  SHORT*  Unlimited               250ms, 128 retries
        SHORT   OPEN    30 - 60 seconds         250ms, 10 retries
        OPEN    SHORT   30 - 60 seconds         250ms, unlimited retries
        OPEN	OPEN     1 -  2 seconds	        1ms, 10 reties
SCSI data bus parity check
        13-14	SHORT*  Executed by IDD
                OPEN	Not executed by IDD
        15-16	SHORT*	RESERVED

Terminal CNH2

UNIT ATTENTION response
        1-2     SHORT*  CHECK CONDITION posted
                OPEN	CHECK CONDITION not posted
Spindle Synchronisation
        3-4     5-6     7-8
        OPEN    ANY     ANY     Disabled
        SHORT   OPEN    OPEN    Inhibited
        SHORT   SHORT	OPEN    Slave mode (mode 1)
        SHORT   OPEN    SHORT   Master mode (mode 2)
        SHORT*  SHORT*	SHORT*  Determined by MODE SELECT Page 4 (mode 3)
Motor start timing
        9-10	SHORT*  Motor start on power up
                OPEN	Motor start via START/STOP UNIT command
Auto spin-up delay
        11-12	SHORT*  Immediate
                OPEN	SCSI ID dependent
                        When the auto spin-up delay is used in conjuntion
                        with the motor start mode setting (CNH2 9-10),
                        a delay can be implemented to sequence spin motors
                        in a multiple drive configuration.  The delay is 30
                        seconds from power on between each SCSI ID address.
                        ID 7 sequences first, followed by each address in
                        descending order.  To calculate the delay, use the
                        following formula :
                        delay in seconds = ( 7 - scsi_id ) * 30
Write/Read RAM
        13-14	SHORT*  Reports CHECK CONDITION
                OPEN	No error reported
        15-16	SHORT*	RESERVED

Terminal CNH3

        There are no user changeable settings on this terminal.

Terminal CNH4

SCSI Terminating Power
        1-2	3-4     Function
        SHORT*	SHORT*	Power is supplied to the terminating resistor from the
                        IDD and TERMPWR pin. Power is also supplied to the
                        TERMPWR pin from the IDD. (Pin 26 of the interface)
        OPEN	SHORT	The TERMPWR pin is not used. Power is supplied to
                        the IDD terminating resistor only from the IDD
        SHORT	OPEN	Power is not supplied to the terminating resistor
                        from the IDD, only from the TERMPWR pin.

Terminal CNH6

        Pin     Signal
        01      Spindle Synchronisation
        02      1K /1.5K
        03      No connection
        04      No connection

Terminal CNH7

        Factory use only.

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