Electronic Components Datasheet Search
English 中文版
Manufacturer Upload
Part Name:
 
Description:
J107F1BS1524VDC  J107F1BS1512VDC  J107F1AS155VDC  J104C2C6VDC  J107F1AS156VDC  IXFN520N075T2  J107F1CS1518VDC  J107F1CS156VDC  J107F1BS1518VDC  J1051A24VDC  
CLK15_6P Cyclone III Device Handbook
Prototype PCB
Part No.:   CLK15_6P
Download: Download   Right selection Save Target As
View Datasheet (Html)   No need to install PDF reader software
Description:   Cyclone III Device Handbook
File Size :   7302 K    
Page : 274 Pages
Logo:   
Maker   ALTERA [ ALTERA CORPORATION ]http://www.altera.com
Buy Now :   
  CLK15_6P Datasheet PDF page 135 CLK15_6P Datasheet PDF page 136 CLK15_6P Datasheet PDF page 137 CLK15_6P Datasheet PDF page 138 CLK15_6P Datasheet PDF page 140 CLK15_6P Datasheet PDF page 141 CLK15_6P Datasheet PDF page 142 CLK15_6P Datasheet PDF page 143  
100%
Chapter 7: High-Speed Differential Interfaces in the Cyclone III Device Family
Design Guidelines
7–17
shows the Cyclone III device family high-speed I/O timing budget.
Figure 7–16. Cyclone III Device Family High-Speed I/O Timing Budget
Internal Clock Period
0.5
×
TCCS
RSKM
SW
RSKM
0.5
×
TCCS
Note to
(1) The equation for the high-speed I/O timing budget is:
eriod
=
0.5
TCCS
+
RSKM
+
SW
+
RSKM
+
0.5
TCCS
f
For more information, refer to the
and
chapters in volume 2 of the
Cyclone III Device Handbook.
Design Guidelines
This section provides guidelines for designing with the Cyclone III device family.
Differential Pad Placement Guidelines
To maintain an acceptable noise level on the V
CCIO
supply, you must observe some
restrictions on the placement of single-ended I/O pins in relation to differential pads.
Altera recommends that you create a Quartus II design, enter your device I/O
assignments, and compile your design to validate your pin placement. The Quartus II
software checks your pin connections with respect to the I/O assignment and
placement rules to ensure proper device operation.
f
For more information about how the Quartus II software checks I/O restrictions, refer
to the
chapter in volume 2 of the
Quartus II Handbook.
Board Design Considerations
This section explains how to achieve the optimal performance from the Cyclone III
device family I/O interface and ensure first-time success in implementing a
functional design with optimal signal quality. You must consider the critical issues of
controlled impedance of traces and connectors, differential routing, and termination
techniques to get the best performance from the Cyclone III device family.
Use the following general guidelines for improved signal quality:
Base board designs on controlled differential impedance. Calculate and compare
all parameters, such as trace width, trace thickness, and the distance between two
differential traces.
Maintain equal distance between traces in differential I/O standard pairs as much
as possible. Routing the pair of traces close to each other maximizes the
common-mode rejection ratio (CMRR).
December 2011
Altera Corporation
Cyclone III Device Handbook
Volume 1
Home - IC Supply - Link
Copyright© 2001 - 2014 ICPDF All Rights Reserved ICPDF.COM

粤公网安备 44030402000629号


粤ICP备13051289号-7