參數(shù)資料
型號(hào): LH540235
廠商: Sharp Corporation
英文描述: 2048 x 18 / 4096 x 18 Synchronous FIFOs
中文描述: 2048 ×四千零九十六分之十八× 18同步FIFO的
文件頁(yè)數(shù): 12/46頁(yè)
文件大?。?/td> 369K
代理商: LH540235
Table 4. Status Flags
NUMBER OF UNREAD DATA WORDS PRESENT WITHIN FIFO
1, 2
FULL
FLAG
MIDDLE FLAGS
EMPTY
FLAG
2048
×
18 FIFO
4096
×
18 FIFO
FF
PAF
HF
PAE
EF
0
0
H
H
H
H
H
L
H
H
H
H
L
L
H
H
H
L
L
L
L
L
H
H
H
H
L
H
H
H
H
H
1 to q
1 to q
(q + 1) to 1024
1025 to (2048 – (p + 1))
(2048 – p) to 2047
2048
(q + 1) to 2048
2049 to (4096 – (p + 1))
(4096 – p) to 4095
4096
NOTES:
1.
q = Programmable-Almost-Empty Offset value. (Default value: q = 127.)
2.
p = Programmable-Almost-Full Offset value. (Default value: p = 127.)
3.
Only 11 (2048
×
18), or all 12 (4096
×
18), of the 12 offset-value-register bits should be programmed. The unneeded most-significant-end
2048
×
18 bit should be LOW (zero).
4.
The flag output is delayed by one full clock cycle in Enhanced Operating Mode, when synchronous operation is specified for intermediate flags.
BOLD ITALIC = Enhanced Operating Mode
LH540235/45
2048 x 18/4096 x 18 Synchronous FIFOs
12
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