參數(shù)資料
型號: intel386 DX
廠商: Intel Corp.
英文描述: 32-Bit CHMOS Microprocessor With Integrated Memory Management(32位CHMOS 微處理器帶集成存儲管理)
中文描述: 32位CHMOS微處理器集成內(nèi)存管理(32位CHMOS微處理器帶集成存儲管理)
文件頁數(shù): 80/139頁
文件大?。?/td> 1587K
代理商: INTEL386 DX
Intel386
TM
DX MICROPROCESSOR
Key: Dn
e
physical data pin n
dn
e
logical data bit n
231630–19
Figure 5-15. Asserting BS16
Y
(one wait state, non-pipelined address)
generated for the two 16-bit bus cycles are closely
related to each other. The addresses are the same
except BE0
Y
and BE1
Y
are always negated for the
second cycle. This is because data on D0–D15 was
already transferred during the first 16-bit cycle.
Figures 5-14 and 5-15 show cases where assertion
of BS16
Y
requires a second 16-bit cycle for com-
plete operand transfer. Figure 5-14 illustrates cycles
without wait states. Figure 5-15 illustrates cycles
with one wait state. In Figure 5-15 cycle 1, the bus
cycle during which BS16
Y
is asserted, note that
NA
Y
must be negated in the T2 state(s) prior to the
last T2 state. This is to allow the recognition of
BS16
Y
asserted in the final T2 state. Also note that
during this state BS16
Y
must be stable (defined by
t17 and t18, BS16
Y
setup and hold timings), in order
to prevent potential data corruption during split cycle
reads. The logic state of BS16
Y
during this time is
not important. The relation of NA
Y
and BS16
Y
is
given fully in
5.4.3.4 Pipelined Address
, but Figure
5-15 illustrates these precautions you need to know
when using BS16
Y
with non-pipelined address.
80
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