參數(shù)資料
型號: EP1C4Q324I7ES
廠商: Altera Corporation
英文描述: Cyclone FPGA Family Data Sheet
中文描述: 氣旋的FPGA系列數(shù)據(jù)手冊
文件頁數(shù): 16/104頁
文件大?。?/td> 763K
代理商: EP1C4Q324I7ES
2–10
Preliminary
Altera Corporation
January 2007
Cyclone Device Handbook, Volume 1
Figure 2–7. LE in Dynamic Arithmetic Mode
Note to
Figure 2–7
:
(1)
The
addnsub
signal is tied to the carry input for the first LE of a carry chain only.
Carry-Select Chain
The carry-select chain provides a very fast carry-select function between
LEs in dynamic arithmetic mode. The carry-select chain uses the
redundant carry calculation to increase the speed of carry functions. The
LE is configured to calculate outputs for a possible carry-in of 0 and carry-
in of 1 in parallel. The
carry-in0
and
carry-in1
signals from a lower-
order bit feed forward into the higher-order bit via the parallel carry chain
and feed into both the LUT and the next portion of the carry chain. Carry-
select chains can begin in any LE within an LAB.
The speed advantage of the carry-select chain is in the parallel pre-
computation of carry chains. Since the LAB carry-in selects the
precomputed carry chain, not every LE is in the critical path. Only the
propagation delays between LAB carry-in generation (LE 5 and LE 10) are
now part of the critical path. This feature allows the Cyclone architecture
to implement high-speed counters, adders, multipliers, parity functions,
and comparators of arbitrary width.
data1
data2
data3
LUT
addnsub
(LAB Wide)
clock (LAB Wide)
ena (LAB Wide)
aclr (LAB Wide)
ALD/PRE
ADATA
CLRN
D
Q
ENA
Re
g
ister chain
connection
LUT
LUT
LUT
Carry-Out1
Carry-Out0
LAB Carry-In
Carry-In0
Carry-In1
(1)
sclear
(LAB Wide)
sload
(LAB Wide)
LUT chain
connection
Re
g
ister
chain output
Row, column, and
direct link routin
g
Row, column, and
direct link routin
g
Local routin
g
aload
(LAB Wide)
Reg
i
ster
F
eedbac
k
相關(guān)PDF資料
PDF描述
EP1C4Q324I8ES Cyclone FPGA Family Data Sheet
EP1C4T100C6ES Cyclone FPGA Family Data Sheet
EP1C4T100C7ES Cyclone FPGA Family Data Sheet
EP1C4T100C8ES Cyclone FPGA Family Data Sheet
EP1C4T100I6ES Cyclone FPGA Family Data Sheet
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EP1C6F256C6 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone I 598 LABs 185 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
EP1C6F256C6N 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone I 598 LABs 185 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
EP1C6F256C7 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone I 598 LABs 185 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
EP1C6F256C7N 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone I 598 LABs 185 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
EP1C6F256C8 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone I 598 LABs 185 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