[gta02-core] New ECN: Test points and 0R resistors for camera interface

Rask Ingemann Lambertsen ccc94453 at vip.cybercity.dk
Fri Sep 11 03:14:32 CEST 2009

Index: docs/ecn/STATUS
--- docs/ecn/STATUS	(revision 5626)
+++ docs/ecn/STATUS	(working copy)
@@ -39,6 +39,7 @@
 0037    Execute Route ROUT1/LOUT1 back to LINE1/LINE2 input
 0038    Discuss Loudspeaker EMI filter
 0039	Discuss	Insert 0R resistors into SPI signals
+0040	Discuss	Test points and 0R resistors for camera interface
 Open ECNs
@@ -63,3 +64,4 @@
 0037    AUDIO
 0038    AUDIO
 0039	CPU, LCM
+0040	CPU

--- /dev/null	2009-09-06 17:58:44.681774387 +0200
+++ docs/ecn/ecn0040.txt	2009-09-11 03:01:38.000000000 +0200
@@ -0,0 +1,24 @@
+Test points and 0R resistors for camera interface
+We should allow for experimentation with the camera interface. The
+24xx/64xx camera interface would be the obvious choice of interface to
+connect a camera to, but a few details need verification:
+The SC32442B manual specifies a short VSYNC pulse (high) between lines. 
+Several camera modules instead keep VSYNC high during lines. It is not clear
+from the manual if simply inverting VSYNC polarity is enough to make it
+The SC32442B manual isn't quite clear on how to receive e.g. JPEG compressed
+data as offered by some cameras. E.g. will we need a separate VSYNC
+interrupt pin to deal with variable frame data lengths?
+The change is to route unused pins to test points and insert 0R into the
+Impact: Little if any. The signals currently at the camera port are less
+than 1 Hz or not used at all.
+Author: Rask Ingemann Lambertsen <ccc94453 at vip.cybercity.dk>

Rask Ingemann Lambertsen
Danish law requires addresses in e-mail to be logged and stored for a year

More information about the gta02-core mailing list