Functional Description; System Unit/Server Overview - Sun Microsystems Ultra 2 series Service Manual

C
A P P E N D I X

Functional Description

This section provides a functional description of the system unit or server
electronics.
Section C.1 "System Unit/Server Overview" on page C-1
Section C.2 "Power Supply" on page C-26
Section C.3 "Power Management" on page C-28
Section C.4 "Motherboard" on page C-28
Section C.5 "Jumper Description" on page C-29
Section C.6 "Enclosure" on page C-33
Section C.7 "Environmental Compliance" on page C-34
Section C.8 "Agency Compliance" on page C-34
C.1

System Unit/Server Overview

The processor-to-memory interconnection is provided by the UPA mechanism
(
FIGURE C-1
system I/O (SYSIO) ASIC reside on the UPA. A slave UPA port is provided for
graphic device communications between the UPA graphic(s), the BMX and CBT
ASICs, and the SYSIO ASIC. All UPA interactions are controlled by the
multi-processing system controller (SC-MP) ASIC.
The I/O sub-system connects to the processor-to-memory subsystem through the
SYSIO ASIC. The SYSIO ASIC provides connectivity to four SBus slots, the fast
Ethernet parallel port SCSI (FEPS) ASIC, the audio (APC) ASIC, and the Slavio
ASIC.
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). The output of the UltraSPARC processor(s) and the output of the
C-1