r5289 - trunk/gta02-core/docs/ecn
werner at docs.openmoko.org
werner at docs.openmoko.org
Sun Jul 5 00:56:24 CEST 2009
Author: werner
Date: 2009-07-05 00:56:21 +0200 (Sun, 05 Jul 2009)
New Revision: 5289
Added:
trunk/gta02-core/docs/ecn/ecn0025.txt
Modified:
trunk/gta02-core/docs/ecn/STATUS
Log:
Added ECN0025: Connect CLKOUT1 to UEXTCLK (U1501)
Modified: trunk/gta02-core/docs/ecn/STATUS
===================================================================
--- trunk/gta02-core/docs/ecn/STATUS 2009-07-04 14:07:42 UTC (rev 5288)
+++ trunk/gta02-core/docs/ecn/STATUS 2009-07-04 22:56:21 UTC (rev 5289)
@@ -24,3 +24,4 @@
0022 Discuss Apply bass fix
0023 Edit Fix #1024 (C1009)
0024 Edit Improve GPS ground and PCB layout
+0025 Discuss Connect CLKOUT1 to UEXTCLK (U1501)
Added: trunk/gta02-core/docs/ecn/ecn0025.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0025.txt (rev 0)
+++ trunk/gta02-core/docs/ecn/ecn0025.txt 2009-07-04 22:56:21 UTC (rev 5289)
@@ -0,0 +1,12 @@
+Connect CLKOUT1 to UEXTCLK (U1501)
+
+
+Routing CLOCKOUT1 to UEXTCLK would allow the serial ports to use the USB
+clock as input to the clock dividers. This would come in handy when using
+frequency scaling, because we can't usually avoid glitching any of the
+internally available clock sources on frequency changes. Suggested by Cesar
+Eduardo Barros here:
+https://lists.openmoko.org/pipermail/hardware/2008-August/000461.html
+
+
+Author: Rask Ingemann Lambertsen <ccc94453 at vip.cybercity.dk>
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