View Full Version : STi5500 vs STi5505
01-21-2002, 03:03 PM
OK, here's something I haven't quite figured out yet...
Several searches on STMicroelectronic's website and you will find that the STi5500 is designed to meet DTV standards. You'll also find that the STi5505 is designed for DVD playback...
So, why is it that the D'TiVo (the DSR6k, specifically. I don't know about the Sony) contains a STi5505 instead of a STi5500???
anyone? anyone? BubbaJ?
01-22-2002, 10:14 AM
The 5500 is simply an older version of the same chip, without the integrated transport layer. 'DTV Standards' means that it can be hooked up to the appropriate transport layer, and decrypt the video.
The 5505 is quite well suited to a large number of tasks, My Apex DVD player uses it, some newer DSS receivers use it, some DD stereo systems use it, most HDTV reveicers use it, my DTV (OTA not Dave) tv tuner uses it. .. the list goes on. A big reason for its proliferation is that ST Guarantees that if you use their build package (including compiler) that you'll be able to move your code to the next generation chip when it becomes available.
The document I've been using to identify configuration registers/etc.. is 4556.pdf, it's title is ST20-TP2
01-22-2002, 10:26 AM
Ahh, ok that makes sense...
So, what is the difference in the ST20-TP2 and the ST20-C2?
the datasheet for the STi5500 specifically states that it has an integrated ST20-C2 CPU... is the TP2 just a C2 with added transport layer?
01-22-2002, 10:39 AM
sounds right.. (the 2 refers to the code revision, 4 has more opcodes than 2, which has more opcodes than 1) .. your instruction manual should be OK.. it's the same one I have.. :D
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