r5192 - trunk/gta02-core/docs/ecn

werner at docs.openmoko.org werner at docs.openmoko.org
Mon Jun 22 13:59:39 CEST 2009


Author: werner
Date: 2009-06-22 13:59:39 +0200 (Mon, 22 Jun 2009)
New Revision: 5192

Added:
   trunk/gta02-core/docs/ecn/ecn0006.txt
Modified:
   trunk/gta02-core/docs/ecn/STATUS
Log:
One more ECN:

0006  Either remove or populate R1701 (PMU.ADAPTSNS pull-down)



Modified: trunk/gta02-core/docs/ecn/STATUS
===================================================================
--- trunk/gta02-core/docs/ecn/STATUS	2009-06-22 11:48:46 UTC (rev 5191)
+++ trunk/gta02-core/docs/ecn/STATUS	2009-06-22 11:59:39 UTC (rev 5192)
@@ -5,3 +5,4 @@
 0003	Editing	Remove SHUTDOWN net and connect PMU.SHUTDOWN directly to GND
 0004	Editing	Remove R1767 and R1768 and connect all PMU.EXTONx to R1766
 0005	Editing	Simplify/remove BAT_ID/BATTEMP circuit (R1769)
+0006	Editing	Either remove or populate R1701 (PMU.ADAPTSNS pull-down)

Added: trunk/gta02-core/docs/ecn/ecn0006.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0006.txt	                        (rev 0)
+++ trunk/gta02-core/docs/ecn/ecn0006.txt	2009-06-22 11:59:39 UTC (rev 5192)
@@ -0,0 +1,11 @@
+Either remove or populate R1701 (PMU.ADAPTSNS pull-down)
+
+
+ADAPTSNS is an input without internal pull-up or pull-down resistor.
+We should therefore not let it float. However, it's also debounced,
+so letting it float may have no detrimental effect.
+
+GTA02 provides a footprint for a pull-down resistor (R1701) but
+doesn't populate it. So there are no known issues in GTA02 with
+letting ADAPTSNS float and we could therefore remove the R1701
+footprint.




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