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參數(shù)資料
| 型號： | CY7C454 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 4Kx9 Cascadable Clocked FIFOs with Programmable Flags(帶可編程標記的4Kx9可級聯(lián)定時的先進先出) |
| 中文描述： | 4Kx9級聯(lián)與時鐘FIFO的可編程標志（帶可編程標記的4Kx9可級聯(lián)定時的先進先出） |
| 文件頁數(shù)： | 7/23頁 |
| 文件大?。?/td> | 437K |
| 代理商： | CY7C454 |
CY7C451
CY7C453
CY7C454
7
PRELIMINARY
Switching Waveforms
Notes:
17. To only perform reset (no programming), the following criteria must be met: ENW or CKW must be inactive while MR is LOW.
18. To only perform reset (no programming), the following criteria must be met: ENR or CKR must be inactive while MR is LOW.
19. All data outputs (Q
0 – 8
) go LOW as a result of the rising edge of MR after t
.
20. In this example, Q
will remain valid until t
OHMR
if either the first read shown did not occur or if the read occurred soon enough such that the valid
data was caused by it.
Write Clock TimingDiagram
Read Clock Timing Diagram
t
CKW
C451-6
C451-7
t
CKH
t
CKL
t
HD
t
SD
ENABLED WRITE
DISABLED WRITE
VALID DATA IN
t
SEN
t
HEN
t
SEN
t
HEN
ENABLED READ
DISABLED READ
PREVIOUS WORD
t
CKR
t
CKH
t
CKL
t
OH
t
SEN
t
HEN
t
SEN
t
HEN
NEW WORD
t
A
Master Reset (Default with Free-Running Clocks) Timing Diagram
t
PMR
t
MRR
t
SCMR
t
MRR
t
OHMR
VALID DATA
t
AMR
t
MRF
ALL DATA
OUTPUTS LOW
t
SCMR
t
MRF
CKW
MR
ENW
CKR
ENR
Q
0– 8
E/F,PAFE
HF
FIRST
t
FH
t
FH
t
FD
t
FD
t
FH
t
FD
t
FD
t
FH
CKR
Q
0– 8
ENR
E/F,PAFE
CKW
D
0– 8
ENW
E/F,PAFE,HF
[17,18,19,20]
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|---|---|
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