Jeff King wrote:

  Hi:

  My PIC will be doing other things, so I'd like it to be off
  board. Overlay (i.e. being able to insert text into a pre-
  existing video signal) is a requirement.

  The 'chips' I am refering to are in many (most) TV's today...
  the type that can overlay closed captioning or various TV
  functions (like your volume setting and channel). All
  the various functions (sync seperation etc) are already
  done for you. Generally you talk to them via a IC2 line.

  What I am asking is if anyone has used any of these with
  PIC's and what there experince's were. As this is not
  a specific PIC question, I might be best asking this on
  sci.electronics. But since my target processor is a PIC,
  I thought I'd start here :-)

  Thanks!

  Regards,

  ------------------------------------
  | Jeff King      Aero Data Systems |
  | jeff@mich.com  P.O. Box 510895   |
  | (810)471-1787  Livonia, MI 48151 |
  |F(810)471-0279  United States     |
  ------------------------------------

 Take a look at the uPD6450 family from NEC. They have a simple 3-wire
interface, very easy to handle in SW. Sync separation has to be made
separately though. LM1881 is the basic choice.
Goeran Moerk
gm@sysinno.se