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參數(shù)資料
| 型號： | CY7C43666AV-7AC |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | FIFO |
| 英文描述： | 3.3V 1K 4K 16K x 36 x 18 x 2 Tri Bus FIFO |
| 中文描述： | 4K X 36 BI-DIRECTIONAL FIFO, 6 ns, PQFP128 |
| 封裝： | 14 X 20 MM, 1.40 MM HEIGHT, PLASTIC, TQFP-128 |
| 文件頁數(shù)： | 14/40頁 |
| 文件大小： | 644K |
| 代理商： | CY7C43666AV-7AC |
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CY7C43646AV
CY7C43666AV
CY7C43686AV
Document #: 38-06026 Rev. *C
Page 14 of 40
Table 5. FIFO1 Flag Operation (CY Standard and FWFT modes)
Number of Words in FIFO Memory
[61, 3, 4, 5, 6]
Synchronized to CLKB
Synchronized to CLKA
CY7C43646AV
CY7C43666AV
CY7C43686AV
EFB/ORB
AEB
AFA
FFA/IRA
0
0
0
L
L
H
H
1
–
X1
1
–
X1
1
–
X1
H
L
H
H
(X1 + 1) to [1024
–
(Y1
–
1)]
(X1 + 1) to [4096
–
(Y1 + 1)]
(X1 + 1) to [16384
–
(Y1 + 1)]
H
H
H
H
(1024
–
Y1) to
1023
(4096
–
Y1) to
4095
(16384
–
Y1) to
16383
H
H
L
H
1024
4096
16384
H
H
L
L
Table 6. FIFO2 Flag Operation (CY Standard and FWFT modes)
Number of Words in FIFO Memory
[61, 4, 5, 7, 8]
CY7C43646AV
CY7C43666AV
0
0
1
–
X2
1
–
X2
(X2 + 1) to [1024
–
(Y2 + 1)]
(Y2 + 1)]
(1024
–
Y2) to 1023
(4096
–
Y2) to 4095
Synchronized to CLKA
EFA/ORA
L
H
H
Synchronized to CLKC
AFC
H
H
H
CY7C43686AV
0
1
–
X2
(X2 + 1) to [16384
–
(Y2 + 1)]
(16384
–
Y2) to
16383
16384
AEA
L
L
H
FFC/IRC
H
H
H
(X2 + 1) to [4096
–
H
H
L
H
1024
4096
H
H
L
L
Table 7. Data Size Table for Word Writes to FIFO2
Size Mode
[9]
SIZE
BE
L
H
Write No.
Data Written to FIFO2
C
9
–
17
A
C
C
A
Data Read From FIFO2
A
18
–
26
B
C
0
–
8
B
D
D
B
A
27
–
35
A
A
9
–
17
C
A
0
–
8
D
1
2
1
2
L
L
A
B
C
D
Notes:
3.
X1 is the almost-empty offset for FIFO1 used by AEB. Y1 is the almost-full offset for FIFO1 used by AFA. Both X1 and Y1 are selected during a FIFO1 reset
or port A programming.
When a word loaded to an empty FIFO is shifted to the output register, its previous FIFO memory location is free.
Data in the output register does not count as a
“
word in FIFO memory
”
. Since in FWFT Mode, the first word written to an empty FIFO goes unrequested to the
output register (no Read operation necessary), it is not included in the FIFO memory count.
The ORB and IRA functions are active during FWFT mode; the EFB and FFA functions are active in CY Standard mode.
X2 is the almost-empty offset for FIFO2 used by AEA. Y2 is the almost-full offset for FIFO2 used by AFC. Both X2 and Y2 are selected during a FIFO2 reset
or port A programming.
The ORA and IRC functions are active during FWFT mode; the EFA and FFC functions are active in CY Standard mode.
BE is selected at Master Reset. SIZEC must be static throughout device operation.
4.
5.
6.
7.
8.
9.
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