HP Integrity rx7620 Server - User Service Guide, Sixth Edition

Figure 1-2 HP Integrity rx7620 Server (without front bezel)
System Backplane
The system backplane comprises the system clock generation logic, the system reset generation
logic, DC-to-DC converters, power monitor logic, and two Local Bus Adapter (LBA) link-to-PCI
converter ASICs. It also includes connectors for attaching the cell boards, the PCI-X backplane,
MP/SCSI core I/O boards, SCSI cables, bulk power, chassis fans, the front panel display, intrusion
switches, and the system scan card. Unlike Superdome or the rp8400, there are no Crossbar Chips
(XBC) on the system backplane. The “crossbar-less” back-to-back CC connection increases
performance and reduces costs.
Only half of the MP/SCSI core I/O board set connects to the system backplane. The MP/SCSI
boards plug into the backplane, while the LAN/SCSI boards plug into the PCI-X backplane.
18 Introduction