參數(shù)資料
型號: EPF8482A
英文描述: Programmable Logic
中文描述: 可編程邏輯
文件頁數(shù): 27/61頁
文件大?。?/td> 979K
代理商: EPF8482A
Altera Corporation
33
FLEX 8000 Programmable Logic Device Family Data Sheet
FLEX
8000
3
Table 9. FLEX 8000 LE Timing Parameters
Symbol
Parameter
tLUT
LUT delay for data-in
tCLUT
LUT delay for carry-in
tRLUT
LUT delay for LE register feedback
tGATE
Cascade gate delay
tCASC
Cascade chain routing delay
tCICO
Carry-in to carry-out delay
tCGEN
Data-in to carry-out delay
tCGENR
LE register feedback to carry-out delay
tC
LE register control signal delay
tCH
LE register clock high time
tCL
LE register clock low time
tCO
LE register clock-to-output delay
tCOMB
Combinatorial delay
tSU
LE register setup time before clock; LE register recovery time after asynchronous preset, clear, or load
tH
LE register hold time after clock
tPRE
LE register preset delay
tCLR
LE register clear delay
Table 10. FLEX 8000 Interconnect Timing Parameters
Symbol
Parameter
tLABCASC
Cascade delay between LEs in different LABs
tLABCARRY
Carry delay between LEs in different LABs
tLOCAL
LAB local interconnect delay
tROW
Row interconnect routing delay,
tCOL
Column interconnect routing delay
tDIN_C
Dedicated input to LE control delay
tDIN_D
Dedicated input to LE data delay,
tDIN_IO
Dedicated input to IOE control delay
Table 11. FLEX 8000 External Reference Timing Characteristics
Symbol
Parameter
tDRR
Register-to-register delay via 4 LEs, 3 row interconnects, and 4 local interconnects,
tODH
Output data hold time after clock,
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