參數(shù)資料
型號: ARM966E-S
英文描述: ARM966E-S Microprocessor Core preliminary technical manual 6/01
中文描述: ARM966E - ?微處理器核的初步技術(shù)手冊6月1日
文件頁數(shù): 97/166頁
文件大?。?/td> 1145K
代理商: ARM966E-S
ARM966E-S Microprocessor Core Technical Manual
Rev. A
Copyright 1999-2001 by LSI Logic Corporation. All rights reserved.
8-1
Chapter 8
Tightly Coupled RAM
This chapter describes the Instruction and Data RAMs within the
ARM966E-S design. It contains the following sections:
Section 8.1, “Tightly Coupled Memory (TCM) Overview”
Section 8.2, “ARM966E-S SRAM Requirements”
Section 8.3, “Enabling the SRAM”
Section 8.4, “ARM966E-S SRAM Wrapper”
Section 8.5, “Example SRAM Interfaces”
8.1 Tightly Coupled Memory (TCM) Overview
The ARM966E-S supports synchronous SRAM for the tightly coupled
RAM. The TCM interfaces are zero wait state, and data must be returned
in a single clock cycle. The Instruction and Data RAMs can be of any
size up to 512 Kbytes. The Instruction RAM and Data RAM are
independent and thus can be different sizes.
8.2 ARM966E-S SRAM Requirements
The tightly-coupled SRAM is built from blocks of ASIC library compiled
SRAM. The Instruction SRAM (I-SRAM) and Data SRAM (D-SRAM) can
each be any size from 0 bytes to 512 KBytes; the size must be an integer
power of two. The I-SRAM and D-SRAM can have different sizes.
To allow the I-SRAM to be initialized and for access to literal tables
during execution, the data interface of the ARM966E-S must be able to
access the I-SRAM. Thus the instruction and data addresses must be
multiplexed before entering the I-SRAM, and the instruction data is
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