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Pin Connections<br />
PIN NO. I SYMBOL I<br />
FG<br />
2 V5is<br />
Fr itrrie g•our d<br />
OV<br />
FUNCTION<br />
DATA CONNECTOR<br />
Grouna<br />
3 V:3 5V cower supply for logic<br />
4 V, -12.810 Opera ling ',forage for LC<br />
WR L Dcea mile<br />
RD L Galia rear<br />
CL L Chip enable<br />
B CD i-i Cornrnard, L Dula<br />
9 Ni1C No connect an<br />
RESET<br />
DBO<br />
DB1<br />
052<br />
DB3<br />
DBE<br />
DB5<br />
Ht<br />
056 Hrr<br />
"...a<br />
Las<br />
18 DB/<br />
. 9<br />
Is Ht Cc:Ai:111r select<br />
20 RV Di ploy reverse<br />
113<br />
Figura VIII - Pinagem referente ao modulo display HANTRONIX HDM 128GS24Y-1 (adaptada<br />
<strong>de</strong> HANTRONIX INC., 1999)<br />
Obs. 0 backlight CCFL é urn tipo <strong>de</strong> lampada fluorescente <strong>de</strong> dimensoes fisicas reduzidas.<br />
Para aciona-la ha necessida<strong>de</strong> <strong>de</strong> uma tensao entre 900 e 1500Volts, proporcionada por urn<br />
inversor CC-CA.<br />
DIAGRAMA DE TEMPO DO DISPLAY HDM 128GS24<br />
Para confeccionar o software,<br />
<strong>de</strong>ve ser seguido o diagrama <strong>de</strong> tempo da Figura V.III.<br />
C/D<br />
tCDS<br />
..__AC D H<br />
CE<br />
RD WR<br />
tCE, tRD, tWR<br />
1<br />
tDS<br />
DO — D7<br />
(Write)<br />
tDH<br />
DO —07<br />
(Read)<br />
ea- tAC C<br />
tOH<br />
Figura VILII - Diagrama <strong>de</strong> tempo para comunicacao do microcontrolador AT89C52 corn o<br />
display grafico HDM 128GS24 (adaptada <strong>de</strong> HANTRONIX INC., 1999).