Page 149 - Making PIC Microcontroller Instruments and Controllers

GENERAI. 141

$rE, $0X Clear Display- 1An uncleared display shows dark
rectangles in all .he spaces, which nay app€ar
blot.hy and irreq!1ar) .
$FE, $02 Go to home. Fosition one on Line one.
SFE, Soc A11 cursors orF. lhis is the delauLt condirrion on
slarLup.
SFE? $08 Underline Curso! 0N
SrE, $0F UndexLine cursor oFr. This is rhe defaulr condiii..
on s.ar.up -
StE, $10 1,4ove- cursor risht one posrtion.
gFE, $11 llover cursor left one position.
sFEr S8O 14ove .ursor ro posirio4 one of Line one.
$FE? $c0 l4ove .ursoi to Fosilion one of Line tno.
$FE, S91l Move cursor to posiiion one ol line three,
SFE, SD4 Move cursor to posiaion one cf line four.

(scc
All these and orhef codes are dcscdbed in detail in the Hitachi darashecr Tablc 9.1).
You must leam where lhcsc arc located so you can.efefto them whcn necessary,
These commands apply lo all LCDS using the Hiiachi HD4:17lj0U conlrcller or its
equivalent. Sec thc dalasheet fbr this contloller for morc detailed infbrlnation. This
controller has nany commands not shown herc, including linited graphic capatrility
(within thc characteB) and the ability to display Japanese kana characters-
Ilis uselul to ha!e thefull40+pagc datasheetonhand whenevefdoing anything morc
than sending text to the LCD. Thc Hiuchi,l,l780 darasheei can be downloadcd at no
charge fiom the following Wcb si!ci

x ww\\'-alldatasheet.corn/datasheet-pdf/pdf/63673/H
ITACHyHD44780.html
wirh its owr stadng posirion as indi-
LCD displays rcquirc that each line be addressed
cated earlicr Thc exceplion is that most l6 characld singleline displays afe designed
such thal the lint eight charxcters stirt at $80. and the nexr eight siarr ar $C0. so thar
the 16 charactcrs appear to be od rwo lincs !o thc conroller though rhey are displayed
as onc ljnc on the LCD lnodule. Also notc thal lines 3 and 4 offourline displays also
havc an i egular addressing scheme.
II more characters than can be displayed on a line afe sent to the LCD. thcy \rill bc
stored in lhe memory in thc LCD and can be scrolled across thc scrccn when needed.
The number of charactcrs that an LCD can store in its display mcnory is a properry of