Message: 3
Date: Sat, 26 Feb 2011 16:35:36 +1030
From: "Daniel O'Connor" <[email protected]>
Subject: [Fx2lib-devel] Change sync delay macro
To: fx2lib developer mailing list <[email protected]>
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
Hi,
I modified SYNCDELAY to match the Cypress version - this is useful because GPIF
designer generates code which calls it and it's a pain to re-edit the file each
time you change your design.
---> Hi Daniel, sync delay is used in more places that just GPIF
implemenations. Various registers are gated by different clock domains. When
the CPU writes to these specific registers the contents may not be updated
if the sync delay is not executed. The amount of delay is dependent on the two
main clock domains. All the details of sync delay can be reviewed in the
Cypress TRM. This one originally had me scratching my head for several
days...
Hope this helps :) <---
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