This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://firstname.lastname@example.org/.ubuntugirl ubuntugirl2013 at gmail.com
On 7/28/13, Steve Markgraf <steve at steve-m.de> wrote: > Yes, and it took me a while. The basic 'on/off' is controlled by the > SPCA with the code we have, the brightness is controlled by the > PWL-unit of the Calypso, but inverted if I remember correctly. Using your PCB layer pictures, I've traced the PWL signal to the 6-pin IC near the SPCA. The IC label reads "A3-90E", and considering the inductor right next to it, I'm guessing that it's a boost converter for the backlight LED. I'm sure you saw this IC too when you were figuring the BL out - were you perchance able to figure out the full name / part # of this IC, or maybe even find a datasheet for it? > At one point I soldered wires to all connections and hooked them up to > a logic analyzer. It's a 16-bit interface and it was quite easy to > figure out what was what. For all the initialization only 8 bits are > used, for the actual display content you switch to the 16-bit mode. I thus gather that you had (most of) the actual pinout figured out at some point. Would you perchance still have it somewhere in your notes? Kim