piclist 2001\10\31\183809a >
Thread: LCD panel init problems
www.piclist.com/techref/lcds.htm?key=lcd
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face BY : Gennette, Bruce email (remove spam text)



Hitachi type LCDs are fairly old technology.  Even newer clones faithfully
copy the original timing specifications - which are VERY exacting.

At startup you either have to have the voltage powering the display rise at
a very exact rate, or . . .

Wait until after the chip should have initiallized, then hit it with 3
resets in a row, with the correct pauses for each reset command to be
executed.  After the 3 'reset to 8bit, normal cursor and movement
directions' commands (0x30) you then should set your desired mode(s), turn
off then turn on the display and clear & home the display.  This all takes
less than half a second and ensures a consistent startup.

Bye.

{Original Message removed}
<19654A3C5F08454DB653AD1669EF67DB20BE31@nefexch1>

See also: www.piclist.com/techref/lcds.htm?key=lcd
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