Digital PDFs

XX-XXXXX-XX

2000

2 pages

Original

1.0MB

Document:	Lost document 26465
Order Number:	XX-XXXXX-XX
Revision:	000
Pages:	2
Original Filename:	http://sup.xenya.si/sup/info/digital/Alpha/DP21264/Q_21264pb.pdf

OCR Text

♦

Alpha 21264 Microprocessor
Product Brief

Production June, 1998

♦

Description
The Alpha 21264 microprocessor, with benchmarks over
30 SPECint95 and 50 SPECfp95, and with spectacular
bandwidths over 4 GB/s for L2 cache and over 2 GB/s for
memory, enables the system designer to produce the
highest performance systems ranging from PC clients to
enterprise servers. The 21264 is the third-generation 64
bit Alpha Microprocessor. It includes the latest Alpha
architecture enhancements, such as motion-video
symbol photo
instructions and byte/word operations.
The 21264 completely controls its optional L2 cache and provides flexible bus timing to support a wide
range of L2 cache memory devices such as those listed here:
• Commodity 133MHz register-to register burst SRAMs (2+GB/s)
• 250MHz late-write SRAMs (4+GB/s)
• 333MHz dual-data clock-forwarded SRAMs (5+GB/s)

Applications
• Supports Windows NT - the world s fastest
growing operating system.
- Microsoft has chosen Alpha as the first
Windows NT 64-bit platform.
- Microsoft releases Windows NT applications
concurrently for Alpha and Intel systems.
• Runs Windows 95 and non-native Windows NT
applications using the Digital FX!32 binary
translator.

• Supports Open VMS, V x Works, and Linux.
• Optimizes visual computing (video and 3D
graphics) using its powerful floating point unit and
the new Alpha motion-video instructions (MVI).
- Real-time DVD authoring
(MPEG2 and AC-3)
• Simplifies development of a single or dual Alpha
21264-based system using the 21272 core logic
chipset (21272).

• Supports Digital UNIX - the first 64 bit UNIX
operating system.

Benefits
• System developers can deliver a 21264 solution
that:
- Will exceed end-user expectations in
performance and Windows NT compatibility.
- Provides investment protection by way of a
migration path to higher speed 21264s and
future generations of Alpha microprocessor.

22 January, 1998 - Preliminary -

• The 21264 will provide end users with a quantum
leap in performance that will:
- Enable real-time visual computing.
- Perform instant data mining .
- Implement internet commerce.
- Enhance medical imaging.
- Solve the most complex, large data-set problems
quickly.
- Aid research centers in developing solutions to
complex problems in disciplines such as medicine
and polymers.

Pipeline Operation Sequence
The 21264 is a four-way out-of-order-issue microprocessor that performs dynamic scheduling, register renaming,
and speculative execution. The 21264 pipeline contains four integer execution units. Two of the integer execution
units can perform memory address calculations for load and store operations. The 21264 pipeline also contains
two floating point execution units to perform add, divide, square root, and multiply functions.
0

ALU
Shifter

Branch
Predictor

Integer
Register
Rename
Map

Integer
Issue
Queue
(20)

ALU Shifter
Multiplier

Integer
Register
File

System
Bus
(64 Bits)

ALU

Address
ALU

Instruction
Cache
(64KB)
(2 set)

Four
Instructions
Floating
Point
Register
Rename
Map

Floating
Point
Issue
Queue
(15)

Floating-Point
Add,Divide,
and Square Root

Floating
Point
Register
File

64KB

Bus

Data

Interface

Cache

Unit

Floating-Point
Multiply

Cache
Bus
(128 Bits)

Physical
Address
(44 Bits)

For More Information

The 21264 pipeline stages perform the following operations:
Cycle 0 - Instruction fetch using branch prediction
Cycle 1 - Instruction data is transferred to the register rename map hardware
Cycle 2 - Rename (map) instruction register
Cycle 3 - Issue instructions from the queues
Cycle 4 - Read register file
Cycle 5 - Execute integer or floating-point instruction
Cycle 6 - Write integer results or access cache

Quant-X Service & Consulting Ges.m.b.H.
A-9300 St. Veit / Glan
Austria / Europe
Tel.: +43 4212 6004 - 0
Fax: +43 4212 6004 - 20
Mail: office@quant-x.com
http://www.quant-x.com
While Samsung Electronics Co.,Ltd. and Quant-X Service & C
onsulting GmbH. believe the information in this publication is co
rrect as of the date of publication, it is subject to change without
notice.

Characteristics
Electrical

Power supply

Vss=0.0V, Vdd=2.0 V

Operating temperature

Tj=100 C maximum

Storage Temperature range

-55 ºC to + 125 ºC (-67 ºF to 257 ºF )

Power dissipation @ 500MHz

60W (estimated)

Package
Transistor count
Process
Die Size

588-pin IPGA
15.2 million
0.35 micron CMOS six-layer metal
Approximately 3.1

22 January, 1998 - Preliminary -

To learn more about the availability of the
Samsung 21164 (466MHz through 600MHz)
Alpha Microprocessor, contact

5%,

All rights reserved.
IEEE is a registered trademark of The Institute of Electrical and
Electronics Engineers, Inc. Windows NT is a trademark of
Microsoft Corporation.
All other trademarks and registered trademarks are the
property of their respective owners.

Your local dealer