參數(shù)資料
型號(hào): IDT72T54252
廠商: Integrated Device Technology, Inc.
英文描述: 2.5V QUAD/DUAL TeraSync⑩ DDR/SDR FIFO x10 QUAD FIFO or x10/x20 DUAL FIFO CONFIGURATIONS
中文描述: 2.5V的四/雙TeraSync⑩復(fù)員/特別提款權(quán)先進(jìn)先出× 10的四雙FIFO或x10/x20先進(jìn)先出配置
文件頁數(shù): 54/56頁
文件大小: 555K
代理商: IDT72T54252
54
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T54242/72T54252/72T54262 2.5V QUAD/DUAL TeraSync
DDR/SDR FIFO
32K x 10 x 4/16K x 20 x 2, 64K x 10 x 4/32K x 20 x 2 and 128K x 10 x 4/64K x 20 x 2
MARCH 22, 2005
WCLK0
WEN
0
PAF
0
D - (m0 + 1) words
in FIFO
RCLK0
t
PAFA
REN
0
6158 drw38
D - m0 words
in FIFO
D - (m0 + 1) words in FIFO
t
ENS
t
PAFA
t
ENH
t
ENS
t
CLKL
t
CLKH
WCLK0
WEN
0
PAE
0
n0 words in FIFO
(3)
,
n0 + 1 words in FIFO
(4)
RCLK0
REN
0
6158 drw39
t
PAEA
n0 + 1 words in FIFO
(3)
,
n 0+ 2 words in FIFO
(4)
t
PAEA
t
ENS
t
ENS
t
ENH
t
CLKL
t
CLKH
n0 words in FIFO
(3)
,
n0 + 1 words in FIFO
(4)
NOTES:
1. The timng diagramshown is for FIFO0. FIFO1-3 exhibit the same behavior.
2. m0 =
PAF
0 offset.
3. D = maximumFIFO depth. For density of FIFO with bus-matching, refer to the bus-matching section on page 19.
4.
PAF
0 is asserted to LOW on WCLK0 transition and reset to HIGH on RCLK0 transition.
5.
RCS
0 = LOW, and
WCS
0 = LOW.
6.
MD
IW
OW
WDDR
RDDR
PFM
1
D/C
D/C
0
0
0
Figure 33. Asynchronous Programmable Almost-Full Flag Timing (Quad mode, IDT Standard and FWFT mode, SDR to SDR)
NOTES:
1. The timng diagramshown is for FIFO0. FIFO1-3 exhibit the same behavior.
2. n0 =
PAE
0
offset.
3. For IDT Standard Mode.
4. For FWFT Mode.
5.
PAE
0 is asserted LOW on RCLK0 transition and reset to HIGH on WCLK0 transition.
6.
RCS
0 = LOW, and
WCS
0 = LOW.
7.
MD
IW
OW
WDDR
1
D/C
D/C
0
RDDR
0
PFM
0
Figure 34. Asynchronous Programmable Almost-Empty Flag Timing (Quad mode, IDT Standard and FWFT mode, SDR to SDR)
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IDT72T54252L5BB 2.5V QUAD/DUAL TeraSync⑩ DDR/SDR FIFO x10 QUAD FIFO or x10/x20 DUAL FIFO CONFIGURATIONS
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