參數(shù)資料
型號: LH543611
廠商: Sharp Corporation
英文描述: 512 x 36 x 2 / 1024 x 36 x 2 Synchronous Bidirectional FIFO
中文描述: 512 × 36 x一千○二十四分之二× 36 × 2同步雙向先進(jìn)先出
文件頁數(shù): 31/57頁
文件大?。?/td> 475K
代理商: LH543611
543611-44
CK
A
(CK
B
)
R/W
A
(R/W
B
)
R/W
B
(R/W
A
)
EN
B
(EN
A
)
t
RWS
t
ES
t
EH
t
RQS
t
RQH
t
EF
t
RWS
t
RWH
t
ES
t
EH
t
RQS
t
RQH
t
EF
t
SKEW2
(4)
t
RWH
REQ
B
(REQ
A
)
EN
A
(EN
B
)
REQ
A
(REQ
B
)
CK
B
(CK
A
)
EF
2
(EF
1
)
NOTES:
1. A
2A
, A
1A
, and A
0A
all are held HIGH for FIFO access at Port A.
A
0B
is held HIGH for FIFO access at Port B.
2. Parameters without parentheses apply to FIFO #2 operation.
Parameters with parentheses apply to FIFO #1 operation.
3. Assertion of the Empty Flags is controlled by rising clock
edges; whereas, internal deassertion of the Empty Flags
is controlled by falling clock edges, and their external deassertion
is controlled by rising clock edges.
4. t
SKEW2
is the minimum time between a falling CK
B
(CK
A
) edge
and a rising CK
A
(CK
B
) edge for EF to change predictably during
the current clock cycle. If the time between the falling edge of
CK
B
(CK
A
) and the rising edge of CK
A
(CK
B
) is less than t
SKEW2
,
then it is not guaranteed that EF will change state until the next
following CK
A
(CK
B
) edge.
Figure 19. Empty Flag Timing, When Synchronous
TIMING DIAGRAMS (cont’d)
512 x 36 x 2/1024 x 36 x 2 BiFIFOs
LH543611/21
31
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