8 Sep
2013
8 Sep
'13
11:23 a.m.
On 9/8/13 10:47 AM, Chuck Guzis wrote:
I'm with Tony on this one, however. There's a
"mystery" aspect to using an MCU for this sort of thing (i.e., code,
programming). Index can be isolated from sector pulses with a simple one-shot (as is
done on old 8" drives with separate sector and index lines). The rest is a simple
PLL setup with a divider. Robust, contemporaneous with no mystery at all. It could just
as well have been designed
and implemented in 1972 as today.
example patent
3898690_Pertec
under pertec/patents