[time-nuts] Of rubidium life and piggy-bank anemia....

[Bruce Griffiths]

Poul-Henning Kamp wrote:
> In message <4751D4F9.4020207 at xtra.co.nz>, Bruce Griffiths writes:
>   
>> Poul-Henning Kamp wrote:
>>     
>
>
>   
>> The point is that actually using latches in this way is considered poor
>> design practice when crossing clock domains.
>>     
>
> The latches do NOT span clock domains, they are in the same domain
> as the counter.
>
> The signals that make captures the counter value in the latch is
> synchronized to the global clock using 3 D flip-flops.
>
>   
You are missing, the point using latches latched by the output of a
synchroniser is considered bad design practice you should use gated D
flipflops instead.

Bruce