r5686 - trunk/gta02-core/docs/ecn

[werner at docs.openmoko.org]

Author: werner
Date: 2009-10-08 02:33:34 +0200 (Thu, 08 Oct 2009)
New Revision: 5686

Modified:
   trunk/gta02-core/docs/ecn/STATUS
   trunk/gta02-core/docs/ecn/ecn0036.txt
   trunk/gta02-core/docs/ecn/ecn0037.txt
Log:
- reviewed implementation of ECN0036 and moved ECN to "Done"
- reviewed implementation of ECN0037, corrected spelling error, added low 
  level voltage, and moved the ECN to "Done"



Modified: trunk/gta02-core/docs/ecn/STATUS
===================================================================
--- trunk/gta02-core/docs/ecn/STATUS	2009-10-08 00:13:54 UTC (rev 5685)
+++ trunk/gta02-core/docs/ecn/STATUS	2009-10-08 00:33:34 UTC (rev 5686)
@@ -35,8 +35,8 @@
 0033	Done	Replace coupling capacitors for input/output lines
 0034	Execute	Route additional SPI/GPIO pins to debug connector
 0035	Done    Kill WLAN unused RF components
-0036    Execute Removal of decoupling capacitor C3020
-0037    Execute Route ROUT1/LOUT1 back to LINE1/LINE2 input
+0036    Done	Removal of decoupling capacitor C3020
+0037    Done	Route ROUT1/LOUT1 back to LINE1/LINE2 input
 0038    Discuss Loudspeaker EMI filter
 0039	Discuss	Insert 0R resistors into SPI signals
 0040	Discuss	Remove backup battery (BAT1701)
@@ -57,8 +57,6 @@
 0030	MODEM
 0032    AUDIO
 0034	IO
-0036    AUDIO
-0037    AUDIO
 0038    AUDIO
 0039	CPU, LCM
 0040	PMU, MODEM

Modified: trunk/gta02-core/docs/ecn/ecn0036.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0036.txt	2009-10-08 00:13:54 UTC (rev 5685)
+++ trunk/gta02-core/docs/ecn/ecn0036.txt	2009-10-08 00:33:34 UTC (rev 5686)
@@ -7,4 +7,4 @@
 
 Author: Rene Harder <rehar at saweb.de>
 Commit: SVN 5606
-
+Review: Werner Almesberger <werner at openmoko.org>, SVN 5685

Modified: trunk/gta02-core/docs/ecn/ecn0037.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0037.txt	2009-10-08 00:13:54 UTC (rev 5685)
+++ trunk/gta02-core/docs/ecn/ecn0037.txt	2009-10-08 00:33:34 UTC (rev 5686)
@@ -8,7 +8,7 @@
 
 
 We need to connect the codec side of the coupling capacitors C4110 and C4411 
-trough a 1k series resistor (R3030/R3031) to the line input (LINE1 and LINE2)
+through a 1k series resistor (R3030/R3031) to the line input (LINE1 and LINE2)
 of the codec. To be within the standard of line compatible audio inputs we need
 to increase the input impedance to 10k Ohm for a low impedance input. Therefore
 we have to change R4416 and R4417 to at least 10k. 
@@ -20,6 +20,7 @@
 resistance R4402 and the pulldown resistor R4116. If we increase R4416 to 47k 
 Ohm the low level voltage would be around 1.2V, the codec maximum low level is
 at 0.8V so we would not be able to generate an interrupt during jack insert.
+With R4416 = 10k, the low level voltage is 0.55 V.
 
 Comments:
 To use this feature you would still need a special (probably self made) adapter
@@ -29,3 +30,4 @@
 
 Author: Rene Harder <rehar at saweb.de>
 Commit: SVN 5607
+Review: Werner Almesberger <werner at openmoko.org>, SVN 5685