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): 33/172頁
文件大?。?/td> 1142K
代理商: LR4500
System Configuration
3-9
SR0
Scratchpad RAM Mode Set-0
This bit enables and disables scratchpad RAM mode for
Set-0 of the D-cache. Setting the bit to 1 enables
scratchpad mode and clearing it to 0 disables scratchpad
mode.
4
SR1
Scratchpad RAM Mode Set-1
This bit enables and disables scratchpad RAM mode for
Set-1 of the D-cache. Setting the bit to 1 enables
scratchpad mode and clearing it to 0 disables scratchpad
mode.
3
IsC
Isolate Cache
This bit enables isolate cache mode. This means that
stores to the cache are not propagated to external
memory. Setting the bit to 1 enables the mode and
clearing the bit to 0 disables the mode.
2
TAG
Tag Test Mode
This bit enables and disables tag test mode, which is
used for cache maintenance. Setting the bit to 1 enables
the mode, which means that load and store operations
access the Tag RAMs and sample the tag bits Tag Data,
Hit, Write Back (D-cache only), and Valid. Clearing the bit
to 0 disables tag test mode. This bit is used when
IsC = 1.
1
INV
Invalidate Cache Mode
This bit enables and disables invalidate cache mode,
which is used for cache maintenance. Setting the bit to 1
enables the mode. Clearing the bit to 0 disables
invalidate cache mode. This bit is used with IsC = 1.
0
3.3.2 Lbus Controller Registers
The Lbus controller has three 32-bit registers that store information about
SCbus errors and interrupts. They are the SCbus Error Status Register,
the SCbus Error Address Register, and the External Vectored Interrupt
Register. You must access these registers through kseg1 Access to an
unused address causes an SCbus timeout error.
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