r5690 - in trunk/gta02-core: . docs/ecn

[werner at docs.openmoko.org]

Author: werner
Date: 2009-10-14 08:54:50 +0200 (Wed, 14 Oct 2009)
New Revision: 5690

Modified:
   trunk/gta02-core/docs/ecn/STATUS
   trunk/gta02-core/docs/ecn/ecn0008.txt
   trunk/gta02-core/gps.sch
Log:
- gps.sch and ECN0008: added value for C7601
- ECN0008: added some more components removals (already implemented)
- moved ECN0008 to "Execute"



Modified: trunk/gta02-core/docs/ecn/STATUS
===================================================================
--- trunk/gta02-core/docs/ecn/STATUS	2009-10-13 04:49:10 UTC (rev 5689)
+++ trunk/gta02-core/docs/ecn/STATUS	2009-10-14 06:54:50 UTC (rev 5690)
@@ -7,7 +7,7 @@
 0005	Done	Simplify/remove BAT_ID/BATTEMP circuit (R1769)
 0006	Done	Either remove or populate R1701 (PMU.ADAPTSNS pull-down)
 0007	Done	Remove KEEPACT net and connect PMU.KEEPACT directly to IO_3V3
-0008	Edit	Remove external GPS antenna connector and circuit (CON7602)
+0008	Execute	Remove external GPS antenna connector and circuit (CON7602)
 0009	Done	Remove LED transistors (Q1501 and Q1502)
 0010	Done	Remove audio amplifier (U4101)
 0011	Execute	Reduce number of varistors on USB_VBUS (C4902, C4909)

Modified: trunk/gta02-core/docs/ecn/ecn0008.txt
===================================================================
--- trunk/gta02-core/docs/ecn/ecn0008.txt	2009-10-13 04:49:10 UTC (rev 5689)
+++ trunk/gta02-core/docs/ecn/ecn0008.txt	2009-10-14 06:54:50 UTC (rev 5690)
@@ -4,11 +4,18 @@
 Changes to implement in order to remove the external GPS antenna:
 
 - Remove U7606 and C7620
-- Merge C7601 and C7630 into a single capacitor, or remove them completely
+- Merge C7601 and C7630 into a single capacitor.
+
+  Following the reference designs from Atmel and u-blox which put a
+  value between 8.6 pF and 47 pF, with the remark that exact values
+  depend on the layout, we use 22 pF.
+
 - Remove U7605, R7620, C7623, R7613, R7614, C7629, C7628 (external
   antenna power sense)
 - Remove R7615, Q7602 and R7617. Connect R7610 to LNA_AVDD.
+- Remove R7617 and C7623 (pull-down and buffer for VCONT)
+- Remove CON7602, C7631, and L7609 (external antenna connection)
 
 
-
 Author: Alvaro Lopes <alvieboy at alvie.com>
+Review: Werner Almesberger <werner at openmoko.org>, SVN 5689

Modified: trunk/gta02-core/gps.sch
===================================================================
--- trunk/gta02-core/gps.sch	2009-10-13 04:49:10 UTC (rev 5689)
+++ trunk/gta02-core/gps.sch	2009-10-14 06:54:50 UTC (rev 5690)
@@ -1,5 +1,5 @@
-EESchema Schematic File Version 2  date Sat 03 Oct 2009 12:58:35 PM CDT
-LIBS:power,device,conn,gta02-core
+EESchema Schematic File Version 2  date Wed Oct 14 03:34:09 2009
+LIBS:power,device,conn,gta02-core,gta02-core-cache
 EELAYER 24  0
 EELAYER END
 $Descr A3 16535 11700
@@ -1727,7 +1727,7 @@
 U 1 1 4A3D0E33
 P 14250 3700
 F 0 "C7601" V 14050 3700 50  0000 L CNN
-F 1 "UNKNOWN" V 14400 3700 50  0000 L CNN
+F 1 "22p" V 14400 3700 50  0000 L CNN
 F 2 "0402" H 14250 3700 60  0001 C CNN
 	1    14250 3700
 	0    1    1    0