Numeric LCD Display - Serial, Expandable - Sunrom Technologies
Numeric LCD Display - Serial, Expandable - Sunrom Technologies
Numeric LCD Display - Serial, Expandable - Sunrom Technologies
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Sample Application – AT89S52<br />
Th sample code on following page shows how to drive the display serially using AT89S52 controller.<br />
VCC<br />
C8<br />
10uF 16V<br />
R1<br />
10K<br />
+<br />
39<br />
38<br />
37<br />
36<br />
35<br />
34<br />
33<br />
32<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
31<br />
9<br />
U2<br />
AT89S52<br />
P0.0/AD0<br />
P0.1/AD1<br />
P0.2/AD2<br />
P0.3/AD3<br />
P0.4/AD4<br />
P0.5/AD5<br />
P0.6/AD6<br />
P0.7/AD7<br />
P1.0/T2<br />
P1.1/T2EX<br />
P1.2<br />
P1.3<br />
P1.4/SS<br />
P1.5/MOSI<br />
P1.6/MISO<br />
P1.7/SCK<br />
EA/VPP<br />
RST<br />
GND<br />
20<br />
VCC<br />
VCC 40<br />
XTAL1<br />
19<br />
C1<br />
100n<br />
P2.0/A8<br />
P2.1/A9<br />
P2.2/A10<br />
P2.3/A11<br />
P2.4/A12<br />
P2.5/A13<br />
P2.6/A14<br />
P2.7/A15<br />
10<br />
P3.0/RXD<br />
P3.1/TXD 11<br />
12<br />
P3.2/INT0<br />
13<br />
P3.3/INT1<br />
14<br />
P3.4/T0<br />
15<br />
P3.5/T1<br />
16<br />
P3.6/WR<br />
17<br />
P3.7/RD<br />
XTAL2<br />
18<br />
21<br />
22<br />
23<br />
24<br />
25<br />
26<br />
27<br />
28<br />
PSEN 29<br />
ALE/PROG 30<br />
Y1<br />
VCC<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
S1<br />
<strong>Sunrom</strong> <strong>Numeric</strong> <strong>LCD</strong> Model#1129<br />
GND<br />
+V<br />
CLK<br />
LAT<br />
DAT<br />
COM<br />
A<br />
A<br />
A<br />
^ ~<br />
1 2 3<br />
X K F<br />
B F<br />
B F<br />
Y<br />
LOBAT<br />
K<br />
DP1<br />
E<br />
D<br />
G<br />
C<br />
DP2<br />
COL<br />
E<br />
D<br />
G<br />
C<br />
DP3<br />
E<br />
D<br />
G<br />
C<br />
B<br />
C9<br />
33p<br />
11.0592<br />
C10<br />
33p<br />
The code is in C language and can be adapted to any microcontroller easily.<br />
The code can be compiled from below pages (Compiler is Keil C51)<br />
At power up, test function lits up all segments for 5 seconds.<br />
During run time the MCU displays a<br />
integer which increments every<br />
second and places a decimal point<br />
to 2 nd digit.<br />
5<br />
<strong>Sunrom</strong> <strong>Technologies</strong> Your Source for Embedded Systems Visit us at www.sunrom.com
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