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 +work. + +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 +rest. + +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 <[email protected]> -- Rask Ingemann Lambertsen Danish law requires addresses in e-mail to be logged and stored for a year _______________________________________________ gta02-core mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/gta02-core
