參數(shù)資料
型號(hào): LH540215
廠商: Sharp Corporation
英文描述: 512 x 18 / 1024 x 18 Synchronous FIFO
中文描述: 512 ×一千〇二十四分之一十八× 18同步FIFO
文件頁(yè)數(shù): 32/48頁(yè)
文件大?。?/td> 423K
代理商: LH540215
540215-24
Q
0
- Q
17
REN
RCLK
PAF
OE
WEN
D
0
- D
17
WCLK
DATA WRITE
DATA WRITE
DATA READ
LOW
DATA IN
OUTPUT REGISTER
NEXT
DATA READ
NO WRITE
t
SKEW1(1)
t
DS
t
DS
t
SKEW1(1)
t
PAFS
t
PAFS
t
PAFS
t
ENS
t
ENH
t
ENS
t
ENH
t
A
t
A
NO WRITE
NOTES:
1. t
is the minimum time between a rising RCLK edge and a
rising WCLK edge for PAF to change predictably during the current
clock cycle. If the time between the rising edge of RCLK and the
rising edge of WCLK is less than t
, then it is not guaranteed
that PAF will change state until the next following WCLK edge.
2. PAF offset = p. Number of data words written into FIFO already = 511 - p
for the LH540215 and 1023 - p for the LH540225.
3. The internal state of the FIFO:
At A
At B
At , again, 511 - p words in FIFO for LH540215 and 1023 - p words in FIFO for LH540225.
C
Enhanced Operating Mode Timing Diagram
A
C
B
Figure 17. Programmable-Almost-Full-Flag Timing,
When Synchronous (Enhanced Operating Mode)
TIMING DIAGRAMS (cont’d)
LH540215/25
512 x 18/1024 x 18 Synchronous FIFO
32
相關(guān)PDF資料
PDF描述
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