Numeric LCD Display - Serial, Expandable - Sunrom Technologies

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

Numeric LCD Display - Serial, Expandable - Sunrom Technologies

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