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參數(shù)資料
| 型號： | CY7C451 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 512x9 Cascadable Clocked FIFOs with Programmable Flags(帶可編程標記的512x9可級聯(lián)定時的先進先出) |
| 中文描述： | 512x9級聯(lián)與時鐘FIFO的可編程標志（帶可編程標記的512x9可級聯(lián)定時的先進先出） |
| 文件頁數(shù)： | 21/23頁 |
| 文件大?。?/td> | 437K |
| 代理商： | CY7C451 |
CY7C451
CY7C453
CY7C454
21
PRELIMINARY
Table 4. Almost Full Flag Operation Example
[47]
Operation
Read
(ENR=0)
State
of FIFO
AF
AF
AF
AF
AF
AF
>HF
>HF
>HF
>HF
E/F
1
1
1
1
1
1
1
1
1
1
PAFE
0
0
0
0
0
1
1
1
1
0
HF
0
0
0
0
0
0
0
0
0
0
Number of
Words in
FIFO
CY7C451
496
495
495
494
494
494
494
495
495
496
Number of
Words in
FIFO
CY7C453
2032
2031
2031
2030
2030
2030
2030
2031
2031
2032
Number
of Words
in FIFO
CY7C454
4080
4079
4079
4078
4078
4078
4078
4079
4079
4080
Comments
Read
Current
Next
Current
Next
Current
Next
Current
Next
Current
Next
Read
(ENR=0)
Read
Write
(ENW=1)
Flag Update
Write
(ENW=0)
Write
Write
(ENW =0)
Write (Transition
from >HF to AF)
Table 5. Programmable Almost Full/Almost Empty Options - CY7C451/CY7C453/CY7C454
[48]
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
Completely Full and Empty.
0
0
0
0
0
1
16 or less locations from Empty/Full (default)
0
0
0
0
1
0
32 or less locations from Empty/Full
0
0
0
0
1
1
48 or less locations from Empty/Full
PAFE Active when CY7C451/453/454 is:
P
[49]
0
1
2
3
0
0
0
0
1
1
1
1
1
1
0
1
224 or less locations from Empty/Full
240 or less locations from Empty/Full
14
15
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1
1
1
1
1
1
1
1
1
1
0
1
992 or less locations from Empty/Full
1008 or less locations from Empty/Full
62
63
Table 6. Programmable Parity Options
D8
D7
0
X
1
0
1
0
1
1
1
1
D6
X
0
1
0
1
Condition
Parity disabled.
Generate even parity on PG output pin.
Generate odd parity on PG output pin.
Check for even parity. Indicate error on PE output pin.
Check for odd parity. Indicate error on PE output pin.
Notes:
47. Programmed so that Almost Full becomes active when the FIFO contains 16 or less empty locations.
48. D4 and D5 are don’t care for CY7C451.
49. Referenced in Table 1.
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| CY7C454 | 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) |
| CY7C466A | Asynchronous, Cascadable 64K x9 FIFOs(異步，可級聯(lián)的 64K x9 先進先出) |
| CY7C460A | Asynchronous, Cascadable 8K/16K/32K/64K x9 FIFOs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY7C451-14JC | 制造商:Cypress Semiconductor 功能描述:FIFO Mem Sync Dual Depth/Width Uni-Dir 512 x 9 32-Pin PLCC |
| CY7C451-30LMB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C453 WAF | 制造商:Cypress Semiconductor 功能描述: |
| CY7C453-14JI | 制造商:Cypress Semiconductor 功能描述: |
| CY7C453-20JC | 制造商:Cypress Semiconductor 功能描述:FIFO Mem Sync Dual Depth/Width Uni-Dir 2K x 9 32-Pin PLCC 制造商:Cypress Semiconductor 功能描述:FIFO, 2K x 9, Synchronous, 32 Pin, Plastic, PLCC |
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