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| 型號： | 23710 |
| 英文描述： | Understanding Burst Mode Flash Memory Devices |
| 中文描述： | 理解突發(fā)模式閃存設(shè)備 |
| 文件頁數(shù)： | 5/5頁 |
| 文件大?。?/td> | 78K |
| 代理商： | 23710 |
4
Understanding Burst Mode Flash Memory Devices
What Are The Requirements On A System
Using A Burst Mode Flash
The system must provide the three extra control pins:
LBA#, BAA#, and IND#, as well as a clock to synchro-
nize the burst reads. The system must also recognize
how long the burst sequences are. For the
Am29BL162C, the burst sequence is 32 words long
and is used to support microprocessors that implement
an instruction pre-fetch queue, and to support large
data transfers during system configuration. The AMD
burst mode devices are designed to work easily with
processors that support burst mode data. Examples of
burst-compatible processors inclde:
I
Motorola PowerPC family (example: MPC555)
I
Motorola 68000 series (example: Excalibur)
I
Siemens Tri-Core Architecture
I
Hitachi SH-4
SUMMARY
burst mode memory devices have been developed to
increase performance of flash memories. By reducing
to groups of sequential words, a burst mode memory
device can significantly increase system performance.
Using a burst mode memory device can improve per-
formance while holding or reducing cost. But, the de-
gree of performance improvement will depend on
system software taking advantage of the burst address
boundaries. This is done by locating code branches
and data sequences at the beginning of the burst group
boundaries, so that as many words as possible can be
read in burst mode.
Trademarks
Copyright 2000 Advanced Micro Devices, Inc. All rights reserved.
AMD, the AMD logo, and combinations thereof are registered trademarks of Advanced Micro Devices, Inc.
Expressflash is a trademark of Advanced Micro Devices, Inc.
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