Sure Electronics 0-Segment. pitch LED Bar Display Board User s Guide Product Name Product ID : 0-segment.mm pitch LED Bar Display Board : DE-DP0 Product Version : Ver.0 Document Version : Ver.0 Copyright 00-00 Sure Electronics Inc. Page0
Contents Chapter. Overview and Main Feature... -. Overview... -. Part Layout... -. Main Feature... Chapter. Hardware Detail... - Schematic... - Physical Dimension... - Circuit Diagram... - Electric Characters... - Port Definition... --. LED Bar Display and Shift Register Data Driver... --. Data Ports Definition... --. Data Buffer... Chapter. Sample Codes...0 -. LED Segment Drive Demo Board s Schematic...0 -. How to Connect Load...0 -. How to display data with PIC0F00 and PICC.0 environment... Chapter. Contact US... Page
Chapter. Overview and Main Feature LED Bar Display Boards are manufactured by Sure Electronics. This series includes different size panels, such as 0-Segment.mm, 0-Segment mm, and 00-Segment mm. All those panels are driven by SPI like interface and all work in full static mode. They are easy to be interfaced to any Microcontrollers. They could be widely used in panel meter, big clocks and any other information display usage. Sure Electronics provides series of such LED Bar Display Boards which are supposed to reduce your development time and make them standard. In this series, most boards assembled *0 segment LED Bars. If customer needs any special digits and special size ones, you could contact us with the contact information at the end of this document. This document is used to describe how to use 0-segment.mm pitch LED Bar Display Boards. -. Overview -. Part Layout Figure Figure Top Part Layout Page
Figure Bottom Part Layout -. Main Feature --. *0 segment LED Bars are installed on this panel. --. *0pin interface for power serializing and data transferring, data inputs from J and flows out from J. --. A HC00 Nand chip is used to buffer CLK_IN and DIMM_IN control signal. --. LED Bar driver chips are composed of pcs HC and pcs of ULN00, they are serialized to each other, the first chip receives data from Microcontroller or the board ahead, the final chip shifts data to next boards. Data should be clocked in from CLK_IN and DATA_IN in J, and DIMM_IN pin should be pulled down to enable display. ULN00 is used to drive the cathode of those led segments. Page
Chapter. Hardware Detail - Schematic +V U HC GND QA QB QC QD QE B QF CLR QG VCC QH DATA_IN CLK_OUT A CLK 0 R R R R R R R R D SML-LX0/SM 0 +V DIMM_IN DATA_IN J CON0B 0 CLK_IN +V J +V DIMM_OUT DATA_OUT CON0B 0 CLK_OUT +V +V U HC GND QA QB A QC CLK QD 0 QE B QF CLR QG VCC QH R R0 R R R R R R 0 D SML-LX0/SM 0 +V DC V Input +V U HC GND QA QB A QC CLK QD 0 QE B QF CLR QG VCC QH R R R R0 R R R R 0 D SML-LX0/SM 0 C + 0V/00UF C + 0V/00UF C 0 C 0 C 0 C 0 C 0 C 0 C 0 +V +V U HC GND QA QB A QC CLK QD 0 QE B QF CLR QG VCC QH R R R R R R0 R R CLK_IN UA HC00 UB CLK_OUT HC00 U HC GND QA QB A QC CLK QD 0 QE B QF CLR QG VCC QH R R R R R R R R0 D SML-LX0/SM 0 DIMM_IN 0 UC HC00 UD DIMM_OUT HC00 DATA_OUT 0 U ULN00 0 C C C C C C C COM B B B B B B B E 0 +V DIMM_OUT Figure Note: Because of the LED's voltage drop difference, the resistance may vary from the value marked in the schematic. Page
- Physical Dimension Figure Page
- Circuit Diagram Figure Figure Page
- Electric Characters Power Supply: DCV-.V 0.A/pcs (Maximum), for each additional panel, add another 0.A, if voltage is less than V, the brightness would not be enough. Not more than series panels, otherwise the 0pin communication port could not carry so much current. Maximum clock freq: 0MHz, boards serialized If the communication speed is too high, it may cause communication problems. Suggested Refresh Rate: Less than 0Hz if DIMM is not used. Less than 0Hz if DIMM is used. Drive Current/segment: 0mA +ma/-ma, this value may be changed based on the production batch. Drive Method: Fully static. Connection Method: HC in series, SPI like interface. Maximum Cascade Level: boards in series, clock less than 0MHz. Interface Voltage Level: VDD*0.-VDD+0.V, standard CMOS level. If you need TTL/CMOS compatible interface in batch, please contact us but the quantity should be no less than 00pcs. - Port Definition --. LED Bar Display and Shift Register Data Driver Page
U HC R GND QA R DATA_IN QB R CLK_OUT A QC R CLK QD 0 R QE R +V B QF R CLR QG R VCC QH D SML-LX0/SM 0 0 D SML-LX0/SM 0 +V U GND A CLK B CLR VCC HC QA QB QC QD QE QF QG QH 0 R R R R R R R R0 DATA_OUT 0 U ULN00 0 B B B B B B B E C C C C C C C COM DIMM_OUT Figure High brightness red 0-segment LED Bars are installed on this board. They are marked as D-D. DIMM_OUT signal is for brightness control usage, you could add simple on/off or PWM signal on this signal, when this signal is set to high, all segments will light on if valid data is shifted out from the HC chip. If you are changing the data in the HC driven chip, set this pin to low then the hash signal will not affect the display. Of course if you want to adjust the brightness of those LED Bars, PWM signal could be applied on the DIMM_IN pin. It is buffered with a HC00, and DIMM_OUT signal will drive this board and next. HC is used as shift register in this board. They are U-U, and connected to D-D. CLK_OUT is driven by a buffered output from CLK_IN with HC00. DATA_IN is data input pin of the first HC, then all HC of cascaded boards will be serialized. All those pins accept only CMOS signals. Once you clock in correct data through these pins, and ensure that PWM signal or ON/OFF signal is applied correctly on the DIMM_IN pin, the board will begin display. --. Data Ports Definition Page
+V DIMM_IN DATA_IN J CON0B 0 CLK_IN +V +V DIMM_OUT DATA_OUT J CON0B 0 CLK_OUT +V Figure IDC sockets are located on the board. They are data input and output interface, marked as J and J. The definition is shown in Figure. When the board is working separately, connect J to the Microcontroller board and leave J open. If lots of same boards are in series, connect next board s input to previous one s output. Then you could connect up to 0 boards in series. --. Data Buffer +V UA UB CLK_IN CLK_OUT HC00 HC00 UC UD DIMM_IN 0 DIMM_OUT HC00 HC00 Figure 0 HC00 chip is used to buffer Clock and DIMM signal in this board. A CMOS chip is not able to drive over 0pcs CMOS input if the cable is so long, here HC00 is used as NOT gate, and gates in series is a buffer. Page
Chapter. Sample Codes -. LED Segment Drive Demo Board s Schematic +V U PIC0F00 VSS VDD +V DATA R ICSPDAT GP0/ICSPDAT GP/MCLR/VPP MCLR R CLK R ICSPCLK GP/ICSPCLK GP/T0CKI/FOSC R DIMM R C SW 0 SW DIP- SW POWER C 0 J CON0B J CON +V +V POWER DIMM DATA 0 POWER CLK +V MCLR ICSPDAT ICSPCLK J J CON DJ00B DN +V C + C U M0/TO VIN GND VOUT +V C + 0 00uF/V 00UF/0V Figure -. How to Connect Load 0 Pin IDC Flat Cable Power Supply form J or J DC V,A Input J + - J LED Segment Drive Demo Board J J J LED Bar Display Page0
Figure Output Voltage Encoder Position Setting()() V +V ON V +V 0V 0V OFF Notice: () DIP switch only has the ways as shown above to work; any other switching ways are prohibited. () Users shouldn t change the voltage while LED Segment Drive Demo Board is working. It is only allowed to change it before applying the current. -. How to display data with PIC0F00 and PICC.0 environment Source code is shown below, #include <pic.h> CONFIG(UNPROTECT&MCLRDIS&WDTDIS);//Configure Word #define Fuc_key #define DIMM #define CLK #define DATA GP GP GP GP0 unsigned char time; unsigned char position; unsigned char key_pressed,last_key_pressed; void delay_0ms(void) unsigned char i, j, k; for(i = 0; i < 0; i++) for(j = 0; j < 00; j++) k--; void SEG_Shift(void) Page
unsigned char i; position++; if(position>0)position=0; for(i = 0;i < 0; i++) if(i==position) DATA=0; else DATA = ; CLK = 0; CLK = ; void SEG_Shift(void) unsigned char i; position++; for(i = 0;i < position; i++) DATA = ; CLK = 0; CLK = ; for(i = 0;i < (0-position); i++) DATA = 0; CLK = 0; CLK = ; if(position>0)position=0; void SEG_Shift(void) unsigned char i; position++; for(i = 0;i < (0-position); i++) DATA = ; CLK = 0; CLK = ; for(i = 0;i < position; i++) DATA = 0; CLK = 0; CLK = ; if(position>0)position=0; void change(void) key_pressed=fuc_key; if((key_pressed==0)&(last_key_pressed==)) if(key_pressed==0) Page
time++; if(time>)time=; last_key_pressed=key_pressed; void main(void) OSCCAL=0; TRIS = 0b000; OPTION=0b00; while() change(); if(time==)seg_shift(); if(time==)seg_shift(); if(time==)seg_shift(); delay_0ms(); Page
Chapter. Contact US Sure Electronics Co., Ltd. Floor, A zone, Qinhuai Technology Innovation center, NO.0-, DaMing Road, Nanjing, China Tel: +00 +--00 (English service, from GMT-0AM, only for technical questions) Email: Website: support@sure-electronics.net www.sure-electronics.net www.sure-electronics.com www.sureelectronics.net Page