r5193 - trunk/gta02-core/docs/ecn

werner at docs.openmoko.org werner at docs.openmoko.org
Mon Jun 22 14:45:02 CEST 2009


Author: werner
Date: 2009-06-22 14:45:02 +0200 (Mon, 22 Jun 2009)
New Revision: 5193

Added:
   trunk/gta02-core/docs/ecn/ecn0007.txt
Modified:
   trunk/gta02-core/docs/ecn/STATUS
   trunk/gta02-core/docs/ecn/ecn0003.txt
   trunk/gta02-core/docs/ecn/ecn0005.txt
   trunk/gta02-core/docs/ecn/ecn0006.txt
Log:
Completed ECNs 0003, 0005, and 0006. Added ECN0007:

0007  Remove KEEPACT net and connect PMU.KEEPACT directly to IO_3V3



Modified: trunk/gta02-core/docs/ecn/STATUS
===================================================================
--- trunk/gta02-core/docs/ecn/STATUS	2009-06-22 11:59:39 UTC (rev 5192)
+++ trunk/gta02-core/docs/ecn/STATUS	2009-06-22 12:45:02 UTC (rev 5193)
@@ -2,7 +2,8 @@
 -------	-------	---------------------------------------------------------------
 0001	Editing	Remove Glamo (U1801)
 0002	Editing	Remove NOR (U2501)
-0003	Editing	Remove SHUTDOWN net and connect PMU.SHUTDOWN directly to GND
+0003	Review	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)
+0005	Review	Simplify/remove BAT_ID/BATTEMP circuit (R1769)
+0006	Review	Either remove or populate R1701 (PMU.ADAPTSNS pull-down)
+0007	Review	Remove KEEPACT net and connect PMU.KEEPACT directly to IO_3V3

Modified: trunk/gta02-core/docs/ecn/ecn0003.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0003.txt	2009-06-22 11:59:39 UTC (rev 5192)
+++ trunk/gta02-core/docs/ecn/ecn0003.txt	2009-06-22 12:45:02 UTC (rev 5193)
@@ -1 +1,9 @@
 Remove SHUTDOWN net and connect PMU.SHUTDOWN directly to GND
+
+
+The PMU's SHUTDOWN input is not used in GTA02. We could therefore
+remove R1545 (NC) and replace the 10 kOhm pull-down R1765 with a
+direct connection to ground.
+
+
+Author: Werner Almesberger <werner at openmoko.org>

Modified: trunk/gta02-core/docs/ecn/ecn0005.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0005.txt	2009-06-22 11:59:39 UTC (rev 5192)
+++ trunk/gta02-core/docs/ecn/ecn0005.txt	2009-06-22 12:45:02 UTC (rev 5193)
@@ -3,4 +3,11 @@
 
 Since BAT_ID is used for HDQ in GTA02, the analog battery temperature
 monitor is no longer used. We can therefore remove R1769, which is NC.
-Perhaps we can also remove R1705, which is a unique component.
+
+Perhaps we can also remove R1705, which is a unique component. Neither
+Qi, u-boot, nor the kernel set MBCC7.battempena, so no attempt is made
+to measure the battery temperature or let it affect the charger state.
+It should therefore be safe to remove R1705 as well.
+
+
+Author: Werner Almesberger <werner at openmoko.org>

Modified: trunk/gta02-core/docs/ecn/ecn0006.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0006.txt	2009-06-22 11:59:39 UTC (rev 5192)
+++ trunk/gta02-core/docs/ecn/ecn0006.txt	2009-06-22 12:45:02 UTC (rev 5193)
@@ -6,6 +6,9 @@
 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.
+doesn't populate it and ADAPTSNS therefore floats. There are no known
+issues in GTA02 with letting ADAPTSNS float and we could therefore
+remove the R1701 footprint.
+
+
+Author: Werner Almesberger <werner at openmoko.org>

Added: trunk/gta02-core/docs/ecn/ecn0007.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0007.txt	                        (rev 0)
+++ trunk/gta02-core/docs/ecn/ecn0007.txt	2009-06-22 12:45:02 UTC (rev 5193)
@@ -0,0 +1,9 @@
+Remove KEEPACT net and connect PMU.KEEPACT directly to IO_3V3
+
+
+The PMU's KEEPACT input is not used in GTA02. We could therefore
+remove R1546 (NC) and replace the 33 kOhm pull-up R1710 with a
+direct connection to IO_3V3.
+
+
+Author: Werner Almesberger <werner at openmoko.org>




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