Fred said:
I had assumed it was the core 8051 which did all the control and interfacing
with the display hardware. The only digital interface is through I2C and
you have control over a number of PWM outputs and a few more I/O. I felt
the fact the core was a 8051 was of little consequence to the user/designer.
I wish to decode CVBS to RGB teletext video information.
That's what the SAA5264 does, for the most part. It obviously was
designed to go inside the TV and not outside, although I'm sure that
it can be put outside with a little extra effort.
Writing software for the 8051 core may not be
so easy... there certainly aren't enough details in Phillip's online
datasheet to do anything useful.
If this is a one-off decoder, and/or it's not going into a TV, my gut
feeling is that it'd be easier to find one of the PC video cards that
has teletext decoding features. I'll grant you that for those,
the programming interface doesn't seem very clear either. It's starting
to look a small FPGA designed from scratch would be the least opaque solution.
Tim.