Intel SLWBR Product Specification - Page 17

Intel© LB440GX 2U Rack Server Chassis TPS Rev 1.0 7.4 Functional Description This section defines the architecture of the Intel® LB440GX Hot-swap SCSI Backplane, including descriptions of functional blocks and how they operate. The following figure shows the functional blocks of the Hot-swap SCSI Backplane. An overview of each block follows. 68P SCSI Connector ID SELECT SW DIP2 DIP1 OFF OFF OFF ON ON OFF ON ON SLOT0 SLOT1 1 0 3 2 5 4 9 8 EPLD Drive Power Control ID Config Presence SCA-2 Connector 0 (Upper Slot) Presence LVD/SE Multimode TERMINATOR SCA-2 Connector 1 (Lower Slot) Terminator Enable Jumper(JP2) Short : Enable Open : Disable Figure 7. Hot Swap SCSI Backplane Block Diagram 7.4.1 68 pin LVD high density Hot-Swap Connectors The Intel® LB440GX contains two hot swap backplane boards with two high-density LVD connectors on each backplane. The connectors provide power and SCSI signals using a single connector. Each SCSI drive attaches to the backplane using one of these connectors. 7.4.2 SCSI Interface The SCSI interface on the Intel® LB440GX Hot-swap SCSI Backplane provides the required circuitry between the SCSI bus and the Adaptec controller, which contains the intelligence for the backplane. The interface consists of an Altera EPLD. After powering on, the Altera EPLD detects the presence of disks in the slots and powers them on. The SCSI ID configuration of the disks is configured on the backplanes by using two DIP-switches located on the boards. See section 7.3.1 for the SCSI ID configuration options. 12