r5677 - trunk/gta02-core/docs/ecn

[werner at docs.openmoko.org]

Author: werner
Date: 2009-10-07 02:42:42 +0200 (Wed, 07 Oct 2009)
New Revision: 5677

Modified:
   trunk/gta02-core/docs/ecn/STATUS
   trunk/gta02-core/docs/ecn/ecn0015.txt
Log:
- Minor cleanup on ECN0015
- Moved ECN0015 to "Done".



Modified: trunk/gta02-core/docs/ecn/STATUS
===================================================================
--- trunk/gta02-core/docs/ecn/STATUS	2009-10-07 00:29:22 UTC (rev 5676)
+++ trunk/gta02-core/docs/ecn/STATUS	2009-10-07 00:42:42 UTC (rev 5677)
@@ -14,7 +14,7 @@
 0012	Defer	Add fuse to USB_VBUS
 0013	Defer	Increase rated current of B4902
 0014	Defer	Limit non-ESD overvoltage on USB_VBUS (U4905)
-0015	Execute	Remove Calypso serial interface on headset (U4401)
+0015	Done	Remove Calypso serial interface on headset (U4401)
 0016	Done	Remove upper acceleration sensor (U7801)
 0017	Edit	Move Bluetooth module (U2) to main PCB
 0018	Cancel	Add beads/filters to audio signals leaving/entering can
@@ -51,7 +51,6 @@
 0008	GPS
 0010	AUDIO
 0011	USB
-0015	AUDIO
 0017	BT
 0019	AUDIO
 0024	GPS

Modified: trunk/gta02-core/docs/ecn/ecn0015.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0015.txt	2009-10-07 00:29:22 UTC (rev 5676)
+++ trunk/gta02-core/docs/ecn/ecn0015.txt	2009-10-07 00:42:42 UTC (rev 5677)
@@ -1,18 +1,21 @@
 Remove Calypso serial interface on headset (U4401)
 
 
-The Calypso serial interface on the headset port caused many problem. 
+The Calypso serial interface on the headset port caused many problems. 
 
 Changes:
 - removed U4401
-- changed R4407 and R4405 from 33 Ohm to 0 Ohm. These resistors probably kept
-  the input signal from shorting through the amplifier, so there is no need
-  for them anymore. (Remove them completely ?)
+- remove R4405 and R4407 (33 Ohm). These resistors probably kept the input
+  signal from shorting through the amplifier, so there is no need for them
+  anymore.
 - removed TP4405/4406
 - removed R4403, pulldown resistor for U4401 enable lines 
 - remove R4411 and TP4402/4401 as well
 
+Note: with ECN0030, the whole Calypso subsystem gets replaced, so this is
+just one first step in the right direction.
 
+
 Author: Rene Harder <rehar at saweb.de>
 Commit: SVN 5201
 Review: Werner Almesberger <werner at openmoko.org>, SVN 5490