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CT60 and related things BBS
| Re: A cool module for the CT60 |
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Posted by: Didier Méquignon
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Jan,23.2005-17:41
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Well, it's not easy, inside the chip there are just one PLL (here a programmable Phase Locked Loop), 2 programmables divider 4 to 127, a divider by 2 and a divider by 3.
The internal PLL frequency works between 100 and 400 MHz with 250 KHz steps. So if I use a divider by 2, I can create a programmable output for the CT60 between 50 MHz and 200 MHz (limited à 105 by software) with steps of 125 KHz.
If I want another output with lower frequency like Videl or DSP. I can just divide the orignial PLL frequency by 3, 4, 5... Here the CT60 frequency is the PLL frequency / 2.
So at 105 Hz I can get for others outputs 70 MHz, 52.5 MHz and 42 MHz.
At 72 MHz I can get for others outputs 48 MHz, 36 MHz and 28,8 MHz.
The CPX is ready now :-)
Didier.
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