參數(shù)資料
型號(hào): LR4500
廠商: LSI Corporation
英文描述: Superscalar Microprocessor(超標(biāo)量微處理器)
中文描述: 超標(biāo)量微處理器(超標(biāo)量微處理器)
文件頁數(shù): 30/172頁
文件大?。?/td> 1142K
代理商: LR4500
3-6
Programming Model
4-deep write buffer. Clearing the bit to 0 gives a higher
priority to a data read request if the read address does
not match the write address in the write buffer. Setting the
bit to 1 gives higher priority to data write transactions.
SDB
Scan Debug
This bit is reserved. It must be set to 0.
27
IR1
I-cache Scratchpad RAM
Setting this bit to 1 enables scratchpad RAM mode in
Set-1 of the I-cache. Clearing it to 0 disables scratchpad
RAM mode.
26
EVI
External Vectored Interrupt
This bit enables and disables external vectored interrupt.
Setting the bit to 1 enables the interrupt and clearing it
to 0 disables the interrupt.
25
CMP
R3000 Compatibility
This bit enables and disables R3000 compatibility mode.
Setting the bit to 1 enables the mode and clearing it to 0
disables the mode.
24
IIE
I-cache Invalidate Enable
This bit enables and disables the I-cache invalidate
request. Setting the bit to 1 enables the request and
clearing it to 0 disables the request.
23
DIE
D-cache Invalidate Enable
This bit enables and disables the D-cache invalidate
request. Setting the bit to 1 enables the request and
clearing the bit to 0 disables the request.
22
MUL
Multiplier
This bit enables and disables the hardware multiplier.
Setting the bit to 1 enables the multiplier and clearing the
bit to 0 disables the multiplier.
21
MAD
Multiply Accumulate
This bit allows the multiplier to support accumulate
extensions. Setting the bit to 1 enables the feature and
clearing the bit disables the feature. When this bit is set,
MUL must also be set.
20
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