Another mystery of these displays was solved for me the other day when Bunnie took his Media Lab visitors to a direct chip bonding shop in Shenzhen. On the back of the bog standard LCD display there will often be a dome of black epoxy in place of a chip. I thought they were hiding the chip, but in fact the dome covers a piece of raw silicon integrated circuit glued to the board and wired to the board with tiny wires.
-- rec -- http://learn.adafruit.com/character-lcds/overview http://www.freaklabs.org/index.php/Blog/MIT-Media-Lab-Shenzhen-2013/MIT-Media-Lab-Shenzhen-2013-01-22-Chip-on-Board-Bare-Die-Attachment.html freaklabs.org is off-line at the moment, but that looks like the right posting. Lady Ada's tutorial gets to the 8/4 bit bus after several pages of prelims. On Tue, Feb 5, 2013 at 11:31 AM, Douglas Roberts <[email protected]>wrote: > You see, this is the kind of material that keeps me on FRIAM. > > --Doug > > > On Tue, Feb 5, 2013 at 11:29 AM, Roger Critchlow <[email protected]> wrote: > >> The interface to the bog standard LCD display can use either 8 or 4 bits >> parallel, which only changes the number of outs you need to do to fill the >> line buffer, which has an 8 bit byte for each character The 8 bit >> character ROM often has fascinating character sets in the high half >> depending on where the surplus came from. >> >> -- rec -- >> >> >> On Tue, Feb 5, 2013 at 11:16 AM, Steve Smith <[email protected]> wrote: >> >>> Sarbajit - >>> >>> Can you elaborate? I think this one just flew past me... 2 lines of 16 >>> characters with only 4 bit indexing (alphabet of 16 characters?)... This >>> sounds like (much) more than a digital watch (do those even exist anymore?) >>> or even a calculator (only 1 line?). >>> >>> I feel like you handed us a riddle like the sphynx! >>> >>> I tried a massive, brooding, indifferent posture to Dougs posts on this >>> one, but I could only hold the pose for a few seconds before breaking into >>> a belly laugh appropriate only for the Buddha or Santa Claus. >>> >>> - Steve >>> >>> Just to update fellow FRIAMers. >>> >>> The most common standard display device in the world today is the 16x2 >>> character LCD display. The vast majority of installations use it in 4 bit >>> mode. >>> >>> On Tue, Feb 5, 2013 at 12:08 AM, Douglas Roberts >>> <[email protected]>wrote: >>> >>>> As a courtesy to our old-fashioned (to put it politely) FRIAM list >>>> members who are still reading email on their TRS-80 ascii terminals, I will >>>> supply a synopses of the material contained in that new-fangled url thingie >>>> below: the article discusses a massive, indifferent, brooding silence. >>>> >>>> You're welcome. >>>> >>>> >>> >>> >>> ============================================================ >>> FRIAM Applied Complexity Group listserv >>> Meets Fridays 9a-11:30 at cafe at St. John's College >>> to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >>> >>> >>> >>> ============================================================ >>> FRIAM Applied Complexity Group listserv >>> Meets Fridays 9a-11:30 at cafe at St. John's College >>> to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >>> >> >> >> ============================================================ >> FRIAM Applied Complexity Group listserv >> Meets Fridays 9a-11:30 at cafe at St. John's College >> to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >> > > > > -- > *Doug Roberts > [email protected]* > *http://parrot-farm.net/Second-Cousins*<http://parrot-farm.net/Second-Cousins> > * <http://parrot-farm.net/Second-Cousins> > 505-455-7333 - Office > 505-672-8213 - Mobile* > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >
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