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• Two USB ports
• One full-length PCI slots and two half-length PCI slots
• Daughter-board connector for the optional Sun Crypto Accelerator 500 board
• System management controller service processor for remote management (ALOM)
Figure 2-3 is a block-level diagram of the motherboard in the Netra 240 server and illustrates the components that
provide key functionality. The following sections discuss these key components.
UltraSPARC IIIi Processor
Based on Sun’s flagship UltraSPARC III processor, the UltraSPARC IIIi processor in the Netra 240 server combines
high performance with a full feature set. The highly-integrated UltraSPARC IIIi offers low power consumption,
making it ideal for small compact servers and high-density server environments. The UltraSPARC IIIi processor,
packaged in a 959-pin ceramic uPGA, is fabricated with a seven-layer 0.13 micron copper process that results in
less than 50 watts consumption at 1.28 GHz.
The Netra 240 server’s UltraSPARC IIIi processor runs at 1.28 GHz, incorporating on-chip memory management
and bus interfaces to facilitate easy and economical integration of cost-effective systems. The UltraSPARC IIIi
processor also provides the following features for smaller multiprocessor systems:
• The 64-bit, 4-way superscalar SPARC V9 pipeline provides high performance in a low-power consumption package.
• The Memory Controller/System Interface unit manages virtual to physical memory address mappings with
reduced memory latency and large memory support for up to 4 GB of memory per CPU.
• A 32-KB, 4-way associative instruction cache (I-cache) and a 64-KB, 4-way associative data cache (D-cache) help
ensure low-latency access to instructions and data.
• A 1-MB, 4-way associative on-chip L2 cache running at half the CPU core frequency provides increased reliability
and high throughput that scales with processor technology improvements.
• The 128-bit (152 MHz or 160 MHz) J-Bus system interface provides a simple, lightweight system interconnect
optimized for small multiprocessor systems.
Sun Microsystems, Inc.
System
Management
Controller
Dual
Gigabit
Ethernet
PCI slot
64-bit,
33/66 MHz
South Bridge
(General I/O)
PCI slot
64-bit, 33MHz
UltraSPARC IIIi
CPU
JIO
Hostbridge
PCI slot
64-bit, 33MHz
Serial
DIMMs DIMMs
ALOM
Serial
Power
Supply
Unit 0
Power
Supply
Unit 1
ALOM
Network
DVD-ROM
Ethernet 1Ethernet 0
Dual
Gigabit
Ethernet
UltraSPARC IIIi
CPU
JIO
Hostbridge
Ultra160
SCSI
Ethernet 3Ethernet 2
USB0 USB1
SCSI
SCA 500
Disk 0
Disk 1
PCI2a
PCI2b PCI1b
PCI1a
Interrupt
J-Bus (128-bit, 152-160 MHz)
Figure 2-3: Block diagram of the Netra 240 motherboard.
P8 Netra 240 Server Architecture