×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

high speed shift registers
2

high speed shift registers

high speed shift registers

(OP)
i need to convert an 8 bit parallel word to serial.  the problem is i have to do it very quickly approximatly 120MHZ.  i have looked at several shift registers available but i need a bit of inspiration.  has anyone tackled this sort of problem before?

RE: high speed shift registers

Hi best done with a programmable pld. Xilinc xc9536 or lattice m4a5-32/32 or isplsi2032e-225, would be good choices.

RE: high speed shift registers

Usually, the high-speed serial protocol buses have both serializers and deserializers that run upwards of 1 GHz.  I'd look at:
FireWire (IEEE1394)
USB
HotLink
other fiberoptic buses

TTFN

RE: high speed shift registers

It depends on what you are doing with the serial stream when you've got it and what control you have on the design of the receiving circuits.

cbarn24050's advice is ideal if you want maximum flexibility of the encoding technique and have no control on the receiver.

irstuff's solution is ideal if you are sending the data over long distance or are designing the receive circuit too.

Cypress semiconductor's hotlink device (CY7C923/33)is simple to use although designed for 160MHz upwards (It automatically pads the stream if the parallel rate is  slower). There's some good apps notes on Cypress website too.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources