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