Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
You can create a clock within TimeQuest. Constraints->Create Clock.
If the clock is the reference to a PLL, it is automatically recognized .
Include "derive_pll_clocks -create_base_clocks" command in your sdc file to define pll outputs as clocks.
Frequencies of PLL output signals are calculated...
Seems to me that it is related to touching the metal box rather than knocking. Does the same thing happen when you knock the box with a dielectric material?
regards
As far as I know, stencils are not usually given by the PCB manufacturer.
When you go to a assembly facility, they charge you some cost which includes stencils, configuring machines etc.
Anyway, with fine pitch packages and manual soldering, stencils are useless. You usually don't have solder...
You don't need anything special to handle the packages you mention.
Just use solder cream and liquid flux. Do not use the solder too much. Use flux genereously. It prevents solder bridges. Heat 1 one 2 pads at a time using a suitable soldering iron. Remove any solder bridges with a solder brite...
epm7064 projects
As far as I know, placement of most BGA packages are easier than those of fine pitch QFP Packages. The reason is, during the reflow phase, when the balls start to melt, the package self alignes itself compansating for small missaligments, due to surface tension created by...
Perform synthesis and placement/routing steps (Foundation/Alliance or Quartus), replace your top level design file in your rtl workbench with the one generated by your implementation tool (Foundation/Alliance or quartus). You may need to do some changes especially for initialization.
regards
Is REFIN clean? Chip may be working properly but you may have a problem at the digital interface. You should wait until busy is low. Usage of RD and A0 inputs are confusing. It also requires a CMOS compatible clock. Not TTL. You may also check power decopling and routing of power signals.
regards
What features do you plan to put? You may need at least a 4-6 layer pcb, depending on the speed you need. If you plan to design a PCI board you can use a PCI bridge from PLX, unless your aim is not to develop PCI code. You can do the assembly yourself if you use a tqfp chip.
regards
You may get problems even with machine mounted bga chips, especially with fine pitch ones. I have seen a lot! I think XRAY equipment is a must for post manufacturing inspection of bga chips.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
