參數(shù)資料
型號: AMD-K5
廠商: Advanced Micro Devices, Inc.
英文描述: 32-Bit Superior Price/Performance Value Microprocessor(32位高性/價(jià)比微處理器)
中文描述: 32位卓越的價(jià)格/性能值微處理器(32位高性/價(jià)比微處理器)
文件頁數(shù): 50/100頁
文件大?。?/td> 2533K
代理商: AMD-K5
40
AMD-K5 Processor Data Sheet
18522F/0—Jan1997
PRELIMINARY INFORMATION
the external memory system is ready to receive data adds addi-
tional wait states, if they are needed. The processor ceases
driving the current data element upon receiving the BRDY sig-
nal. (See Figure 33 on page 76.)
Figure 6. Burst Write (One Wait State)
The external signal KEN is ignored for burst write cycles since
these are previously cached lines. Writebacks can occur as a
result of the following:
I
Replacement of a data cache entry that is modified
An inquire cycle that hits in a modified line
Assertion of the WBINVD instruction
Assertion of the external signal FLUSH
I
I
I
Only one line is sent for inquire or replacement accesses.
Assertion of FLUSH or execution of WBINVD results in the
modified lines in the entire cache being written back as a
series of single line writes. An inquire or replacement access
results in a writeback of only one line.
BOFF or AHOLD/
HOLD/HLDA During
Burst Transfers
BOFF or AHOLD can be asserted during a burst transfer. The
processor will abort a cycle if BOFF is asserted in the middle of
the cycle. When BOFF is negated, the cycle is restarted from
the beginning.
If AHOLD is asserted, the processor responds by floating the
address pins in the next clock cycle. The system can then drive
the address and assert EADS to generate an inquire cycle
CLK
ADS
BRDY
W/R
CACHE
Data
Add/
Control
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