Filter
Top Products
APPENDIX C
Functional Description
This appendix provides a functional description for the following:
Section C.1 “System Unit” on page 249
Section C.1.14 “Power Supply” on page 274
Section C.1.17 “Main Logic Board” on page 277
The following items are not supported on the Sun Enterprise 220R server:
Graphics and imaging card
Diskette drive
Audio card
C.1 System Unit
The system unit is an UltraSPARC port architecture (UPA)-based multiprocessor
machine that uses peripheral component interconnect (PCI) as the I/O bus. The CPU
modules, U2P ASIC (UPA-to-PCI bridge), and UPA graphics cards communicate with
each other using the UPA protocol. The CPU modules and the U2P ASIC are UPA
master-slave devices. The UPA graphics cards are UPA slave-only devices. The QSC
ASIC routes UPA request packets through the UPA address bus and controls the flow
of data using the XB9+ ASIC. For further information, see the following items:
Section C.1.1 “UPA” on page 252
Section C.1.2 “PCI Bus” on page 253
Section C.1.3 “UltraSPARC II Processor” on page 254
Section C.1.4 “Memory System” on page 255
Section C.1.5 “Graphics and Imaging” on page 259
249