參數(shù)資料
型號(hào): 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(cè)6月1日
文件頁數(shù): 32/166頁
文件大?。?/td> 1145K
代理商: ARM966E-S
2-12
Signal Descriptions
Rev. A
Copyright 1999-2001 by LSI Logic Corporation. All rights reserved.
DENABLE2
Word-Based Data Chip Enable
The ARM966E-S asserts this output HIGH to indicate the
Data RAM data bus is enabled.
Output
DRDATA2[31:0]
Data RAM Read Data
This 32-bit bus contains data read from the Data RAM.
Input
DWDATA2[31:0]
Data RAM Write Data
This 32-bit bus provides write data to the Data RAM.
Output
DWE2[3:0]
Byte Based Data Write Enable
The ARM966E-S asserts these outputs HIGH to enable
writes to the Data RAM.
Output
2.5 DMA Signals
DMAA[25:0]
DMA Address
This 26-bit address contains the byte address for DMA
transfers. Tie all unused address bits LOW.
Input
DMAD[31:0]
DMA Write Data
This 32-bit bus contains the DMA write data to the Data
RAM.
Input
DMAENABLE DMA Port Enable
DMAENABLE must be asserted HIGH for a DMA transfer
to proceed. Asserting DMAENABLE LOW can be used to
save power when the DMA interface is not being used.
Tie DMAENABLE LOW if the DMA Interface is not used
in the implementation.
Input
DWE2 Bit
Function
DWE3
DWE2
DWE1
DWE0
Write enable for DWDATA[31:24]
Write enable for DWDATA[23:16]
Write enable for DWDATA[15:8]
Write enable for DWDATA[7:0]
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