gtaylor@cs.strath.ac.uk (George M Taylor IE87) (11/30/89)
I'm trying to build some sort of Teletext capture and decode circuit on a MultiBus board for use with our UNIX network. However I'm having problems finding any ICs that will simplify the job. Does anyone know anything about the signetics chips: SAA5020, SAA5030, SAA5040, They've been discontinued but I know a supplier who has them. Anyone know if they provide some means of processor interface? Are they IIC controlled? I know Plessey do a chip set. Has anyone used it before - any comments welcome.. Finally, how do you talk to an IIC interface? Are there any chips for providing a processor interface to this. Any advice, comments, data would be very welcome. E-Mail me at : gtaylor@cs.strath.ac.uk Thanks.
michael@fe2o3.UUCP (Michael Katzmann) (12/04/89)
In article <943@baird.cs.strath.ac.uk> gtaylor@cs.strath.ac.uk (George M Taylor IE87) writes: > >I'm trying to build some sort of Teletext capture and decode circuit on a >MultiBus board for use with our UNIX network. > >However I'm having problems finding any ICs that will simplify the job. > >Does anyone know anything about the signetics chips: >SAA5020, SAA5030, SAA5040, I think these "2nd Generation" chips are still available but they are quite old and are much less flexible than the later generation "CCT" (computer controlled teletext) chips. The SAA numbers I can't remember but they are in the similar range (SAA5...). They have I2C bus interfaces and are ideal for your application. They also have the ghost row capabilities and multi page capture. From what I've seen of the other chips from Plessey, TI, and GI the Mullard/Signetics/Philips chips are streets ahead. There is an evaluation board available from philips which is worth getting hold of if your serious. --------------------------------------------------------------------- email to UUCP: uunet!mimsy!{arinc,fe203}!vk2bea!michael _ _ _ _ Amateur | VK2BEA (Australia) ' ) ) ) / // Radio | G4NYV (United Kingdom) / / / o _. /_ __. _ // Stations| NV3Z (United States) / ' (_<_(__/ /_(_/|_</_</_ Michael Katzmann Broadcast Sports Technology. 2135 Espey Ct. #4 Crofton Md. 21114 USA Ph: +1 301 721 5151