Voyager 3000 User Guide

Table 3-1 EMU Switch Settings

Switch

Signal Name

Description

Default Setting

SW1

ID2

Address Bit 2

Setting is

SW2

ID1

Address Bit 1

position

SW3

ID0

Address Bit 0

dependent

SW4

Sync

Spindle Sync

Off

SW5

DLYSEN

Drive Spinup Enable

On

SW6

DLYSON

Drive Spinup Delay

Off

SW7

Term Pwr 1

Termination Power

On

 

 

Enable Bus One

 

SW8

Term Pwr 1

Termination Power

On

 

 

Enable Bus Two

 

SW1àSW3 are used to set the I2C bus ID. A device with address 0 is designated as the master. Any other ID caused the EMU to appear as a slave device. Table 3-2 lists the ID setting for the EMU.

Table 3-2 ID settings for the EMU

SW1

SW2

SW3

EMU ID

Off

Off

Off

0 (Master)

Off

Off

On

1

Off

On

Off

2

Off

On

On

3

On

Off

Off

4

On

Off

On

5

On

On

Off

6

On

On

On

7

SW4 is used to enable drive spindle synchronization.

SW5 and SW6 are used to control drive spinup sequencing.

If SW6 is set off then SW5 will control drive sequencing. If SW5 is off then power up sequencing is disabled. If SW5 is set to on then power up sequencing will be enabled if only one PSU is available10 otherwise no power sequencing will occur.

If SW6 is on then delayed power sequencing will always occur regardless of the setting of SW5. Table 3-3 summarizes these signals

10This situation may occur if a PSU has failed or the system has been set up with only one PSU configured.

3-4

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First Virtual Communications 3000 user manual EMU Switch Settings, ID settings for the EMU