EP2C5Q208I7 参数 Datasheet PDF下载

Contents

DDR Input Registers ......................................................................................................................

DDR Output Registers ...................................................................................................................

Bidirectional DDR Registers .........................................................................................................

Conclusion ............................................................................................................................................

Document Revision History ...............................................................................................................

9–18

9–21

9–22

9–24

9–25

Section IV. I/O Standards

Revision History .................................................................................................................................... 9–1

Chapter 10. Selectable I/O Standards in Cyclone II Devices

Introduction .......................................................................................................................................... 10–1

Supported I/O Standards ................................................................................................................... 10–1

3.3-V LVTTL (EIA/JEDEC Standard JESD8-B) .......................................................................... 10–3

3.3-V LVCMOS (EIA/JEDEC Standard JESD8-B) ..................................................................... 10–4

3.3-V (PCI Special Interest Group [SIG] PCI Local Bus Specification Revision 3.0) ............. 10–4

3.3-V PCI-X ...................................................................................................................................... 10–6

Easy-to-Use, Low-Cost PCI Express Solution ............................................................................ 10–6

2.5-V LVTTL (EIA/JEDEC Standard EIA/JESD8-5) ................................................................. 10–7

2.5-V LVCMOS (EIA/JEDEC Standard EIA/JESD8-5) ............................................................ 10–7

SSTL-2 Class I & II (EIA/JEDEC Standard JESD8-9A) ............................................................. 10–7

Pseudo-Differential SSTL-2 ........................................................................................................... 10–8

1.8-V LVTTL (EIA/JEDEC Standard EIA/JESD8-7) ................................................................. 10–9

1.8-V LVCMOS (EIA/JEDEC Standard EIA/JESD8-7) .......................................................... 10–10

SSTL-18 Class I & II ...................................................................................................................... 10–10

1.8-V HSTL Class I & II ................................................................................................................ 10–11

Pseudo-Differential SSTL-18 Class I & Differential SSTL-18 Class II ................................... 10–12

1.8-V Pseudo-Differential HSTL Class I & II ............................................................................ 10–13

1.5-V LVCMOS (EIA/JEDEC Standard JESD8-11) .................................................................. 10–14

1.5-V HSTL Class I & II ................................................................................................................ 10–14

1.5-V Pseudo-Differential HSTL Class I & II ............................................................................ 10–15

LVDS, RSDS & mini-LVDS ......................................................................................................... 10–16

Differential LVPECL .................................................................................................................... 10–17

Cyclone II I/O Banks ........................................................................................................................ 10–18

Programmable Current Drive Strength .......................................................................................... 10–24

Voltage-Referenced I/O Standard Termination ...................................................................... 10–26

Differential I/O Standard Termination .................................................................................... 10–26

I/O Driver Impedance Matching (R

Pad Placement & DC Guidelines ..................................................................................................... 10–27

Differential Pad Placement Guidelines ..................................................................................... 10–28

V

REF

Pad Placement Guidelines ................................................................................................. 10–28

DC Guidelines ............................................................................................................................... 10–32

5.0-V Device Compatibility .............................................................................................................. 10–34

Conclusion .......................................................................................................................................... 10–36

More Information .............................................................................................................................. 10–37

References ........................................................................................................................................... 10–37

Altera Corporation

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