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UltraSPARC-I 167MHz
General Info
Designer	Sun Microsystems
Manufacturer	Texas Instruments
Model Number	UltraSPARC-I 167MHz
Part Number	STP103OBGA-167
Market	Server, Workstation
Introduction	October 2, 1995 (announced) October 2, 1995 (launched)
Release Price	$1,395
General Specs
Family	UltraSPARC
Series	UltraSPARC-I
Frequency	167 MHz
Microarchitecture
ISA	SPARC V9 (SPARC)
Microarchitecture	UltraSPARC-I
Process	0.5 µm
Transistors	5,200,000
Technology	CMOS
Die	310 mm²
Word Size	64 bit
Cores	1
Threads	1
Electrical
Power dissipation (average)	28 W
Vcore	3.3 V
Packaging
Package BGA-521 (BGA) Pins 521

UltraSPARC-I 167MHz was a 64-bit SPARC microprocessor designed and introduced by Sun Microsystems in late 1995. This processor operates at 167 MHz and typically dissipates 28 W.

Cache

Main article: UltraSPARC-I § Cache

In addition to the on-chip cache, this chip also required an external cache that is either 512 KiB, 1 MiB, 2 MiB, or 4 MiB with a line size of 64 bytes.

[Edit/Modify Cache Info]

Cache Organization Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory. The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC. Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies. Note: All units are in kibibytes and mebibytes.

L1$ 32 KiB 32,768 B 0.0313 MiB L1I$ 16 KiB 16,384 B 0.0156 MiB 1x16 KiB 2-way set associative   L1D$ 16 KiB 16,384 B 0.0156 MiB 1x16 KiB 16-way set associative write-through

Documents

Datasheets

• UltraSPARC-I High-Performance, 167 & 200 MHz, 64-bit RISC Processor Datasheet, October 1996