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| 型號(hào)： | EPF10K100EQC208-1DX |
| 英文描述： | ASIC |
| 中文描述： | 專用集成電路 |
| 文件頁(yè)數(shù)： | 34/120頁(yè) |
| 文件大?。?/td> | 1901K |
| 代理商： | EPF10K100EQC208-1DX |
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20
Altera Corporation
FLEX 10KE Embedded Programmable Logic Family Data Sheet
Cascade Chain
With the cascade chain, the FLEX 10KE architecture can implement
functions that have a very wide fan-in. Adjacent LUTs can be used to
compute portions of the function in parallel; the cascade chain serially
connects the intermediate values. The cascade chain can use a logical AND
or logical OR (via De Morgan’s inversion) to connect the outputs of
adjacent LEs. An a delay as low as 0.6 ns per LE, each additional LE
provides four more inputs to the effective width of a function. Cascade
chain logic can be created automatically by the MAX+PLUS II Compiler
during design processing, or manually by the designer during design
entry.
Cascade chains longer than eight bits are implemented automatically by
linking several LABs together. For easier routing, a long cascade chain
skips every other LAB in a row. A cascade chain longer than one LAB
skips either from even-numbered LAB to even-numbered LAB, or from
odd-numbered LAB to odd-numbered LAB (e.g., the last LE of the first
LAB in a row cascades to the first LE of the third LAB). The cascade chain
does not cross the center of the row (e.g., in the EPF10K50E device, the
cascade chain stops at the eighteenth LAB and a new one begins at the
nineteenth LAB). This break is due to the EAB’s placement in the middle
of the row.
Figure 10 shows how the cascade function can connect adjacent LEs to
form functions with a wide fan-in. These examples show functions of
4n variables implemented with n LEs. The LE delay is 0.9 ns; the cascade
chain delay is 0.6 ns. With the cascade chain, 2.7 ns are needed to decode
a 16-bit address.
Figure 10. FLEX 10KE Cascade Chain Operation
LE1
LUT
LE2
LUT
d[3..0]
d[7..4]
d[(4
n – 1)..(4n – 4)]
d[3..0]
d[7..4]
LE
n
LE1
LE2
LE
n
LUT
AND Cascade Chain
OR Cascade Chain
d[(4
n – 1)..(4n – 4)]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EPF10K100EQC208-1X | Field Programmable Gate Array (FPGA) |
| EPF10K100EQC208-2 | Field Programmable Gate Array (FPGA) |
| EPF10K100EQC208-2DX | ASIC |
| EPF10K100EQC208-2X | Field Programmable Gate Array (FPGA) |
| EPF10K100EQC208-3 | Field Programmable Gate Array (FPGA) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EPF10K100EQC208-1N | 功能描述:FPGA - 現(xiàn)場(chǎng)可編程門陣列 FPGA - Flex 10K 624 LABs 147 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256 |
| EPF10K100EQC208-1X | 功能描述:FPGA - 現(xiàn)場(chǎng)可編程門陣列 FPGA - Flex 10K 624 LABs 147 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256 |
| EPF10K100EQC208-2 | 功能描述:FPGA - 現(xiàn)場(chǎng)可編程門陣列 FPGA - Flex 10K 624 LABs 147 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256 |
| EPF10K100EQC208-2DX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ASIC |
| EPF10K100EQC208-2N | 功能描述:FPGA - 現(xiàn)場(chǎng)可編程門陣列 FPGA - Flex 10K 624 LABs 147 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256 |
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