6 Oct
2009
6 Oct
'09
3:03 p.m.
On Tue, 6 Oct 2009, Philip Pemberton wrote:
According to the Catweasel IV+ documentation, there is a 56Mhz clock
available. Not sure if that's new for that version or not.
Steve
--
I had been
wondering this weekend if a Catweasel had high enough timer
resolution for a ST-412 era data stream.
I did some back-of-the-envelope calculations a while ago --
An ST412 will allow a maximum of 5e6 flux transitions per second.
1/5e6 = 200 nanoseconds between two flux transitions (worst case)
The Catweasel's clock oscillator is switchable between:
- 7.080MHz
- 14.161MHz
- 28.332MHz (Mk3 and Mk4 only)
Which gives a timing resolution of:
- 7.080MHz -- 141.2429 nanoseconds
- 14.161MHz -- 70.6165 nanoseconds
- 28.332MHz -- 35.2958 nanoseconds