Sun Microsystems 220R service manual ASICs, Scsi ID Selection

backplane card in support of the multi-host configuration. The following figure shows the functionality of the internal SCSi assembly.

C.1.11.5 SCSI ID Selection

The main logic board host adapter is assigned the SCSI identification of 7 for both ports. The two internal drives attached to the SCA-2 connectors have a SCSI identification of 0 and 1, while the CD-ROM has an identification of 6.

C.1.12 ASICs

The system unit achieves a high level of integration through application-specific intergrated circuits (ASICs). All ASICs are 1149.1 (JTAG) compliant. The following ASICs are highlighted and are described in the following subsections:

4XB9+

QSC

Functional Description 271