Download User's Guide

2.3" 2 Digit 7-Segment Red
Display Board
User’s Guide
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0
2.3" 2 DIGIT 7-SEGMENT RED
DISPLAY BOARD
USER’S GUIDE
Table of Contents
Chapter 1. Overview ..........................................................................................................1
1.1 Overview .............................................................................................................. 1
1.2 Quick Start ........................................................................................................... 2
Chapter 2. Hardware Detail ...............................................................................................3
2.1
2.2
2.3
2.4
2.5
2.6
7-segment LED .................................................................................................... 3
Shift Register Data Driver................................................................................... 4
Data Ports Definition........................................................................................... 4
Auxiliary Power Interface ................................................................................... 5
Data Buffer ........................................................................................................... 5
Connection in Series .......................................................................................... 6
Chapter 3. Electrical Characteristics ...............................................................................7
Chapter 4. Sample Codes..................................................................................................8
4.1 LED Segment Drive Demo Board’s Schematic................................................. 8
4.2 How to Connect Load ......................................................................................... 8
4.3 How to Display Data with PIC16F54 and PICC9.60 Environment ................... 9
Chapter 5. Mechanical Drawing...................................................................................... 11
Chapter 6. Contact Us .....................................................................................................12
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0_Page i
2.3" 2 Digit 7-Segment Red Display Board
NOTES:
Product Version
：
Ver 1.0
Document Version
：
Ver 1.0
DE-DP22811_Ver1.0_Page ii
© 2004-2010 Sure Electronics Inc
2.3" 2 DIGIT 7-SEGMENT RED
DISPLAY BOARD
USER’S GUIDE
Chapter 1. Overview
1.1 Overview
Thanks for using 7-segment information board series by Sure Electronics. This series
includes 5 different size panels, they are 1.5inches, 1.8inches, 2.3inches, and 4inches,
7inches (character height). All those panels are driven by SPI like interface and all work
in full static mode. They are easy to be interfaced to any Microcontroller. They could be
widely used in panel meters, big clocks and any other information display usage.
Sure Electronics providing series of such information boards is to reduce your
development time and make them standard. In this series, most boards are 4 digits and
static, if customer need any special digits and special size ones, could contact us with
the contact information at the end of this document.
This document is used to describe how to use 2.3 inches character height panels.
FIGURE 1-1 OVERVIEW
FIGURE 1-2 ACCESSORY
Note: All the diagrams in this manual are for reference only.
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0_Page 1
2.3" 2 Digit 7-Segment Red Display Board
1.2 Quick Start
Please connect the info boards and the driver board as follows.
FIGURE 1-3 CONNECTION SCHEMATIC
Note:
1. Pay attention to the connection of Input and Output.
2. Connect the info boards and the demo board before power on.
DE-DP22811_Ver1.0_Page 2
© 2004-2010 Sure Electronics Inc
2.3" 2 DIGIT 7-SEGMENT RED
DISPLAY BOARD
USER’S GUIDE
Chapter 2. Hardware Detail
2.1 7-segment LED
2.3’’ 2 digits 7-segment LEDs are installed on the board. All the segments are commonanode. The four digits are respectively marked as U3, U4 on the schematics. LEDs are
driven by DIMM_NOT signal from DIMM_IN pin via 74HC00 NAND. Of course you can
also drive the LED and adjust the brightness by applying PWM signal on the DIMM_IN
pin. When the valid data is shifted from 74HC164 and DIMM_NOT signal is set to high
(DIMM_IN signal low), all the corresponding segments will be illuminated. Before
change the data displayed by segments, turn off the display first and then write new data
into 74HC164 chip.
1
5
5
U4
COM1
A
B
C
D
E
F
G
DP
COM2
7
6
4
3
2
9
10
8
COM2
A0
A1
A2
A3
A4
A5
A6
A7
COM1
U3
1
Vcc
FIGURE 2-1 7-SEGMENT LEDS
8 8
D23011
A
B
C
D
E
F
G
DP
7
6
4
3
2
9
10
8
B0
B1
B2
B3
B4
B5
B6
B7
D23011
FIGURE 2-2 DIMM_NOT
+12V
R19
G
Q3
D
1
S
2
103
FDN302P SOT-23
3
R20
3
Vcc
561
1
b
Q4
ec
R21
DIMM_NOT
9014
2
152
R22
103
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0_Page 3
2.3" 2 Digit 7-Segment Red Display Board
FIGURE 2-3 DIMM_IN AND DIMM_NOT
2.2 Shift Register Data Driver
FIGURE 2-4 SHIFT REGISTER DATA DRIVER
7
1
DATA_IN
CLK_OUT
C1
1
8
2
9
14
+5V
1
2
10pF
U1 74HC164/SOIC
3
GND
QA 4
QB 5
QC 6
A
CLK
QD 10
QE 11
QF 12
B
CLR
QG 13
VCC
QH
7
6
5
4
3
2
1
8
U2 ULN2003/SOIC
10
7B
7C 11
6B
6C 12
5B
5C 13
4C 14
4B
3B
3C 15
2B
2C 16
1B
1C 9
E
COM
R1
R2
R3
R4
R5
R6
R7
221
221
221
221
221
221
221
A0
A1
A2
A3
A4
A5
A6
R8
102
A7
R10
R11
R12
R13
R14
R15
R16
221
221
221
221
221
221
221
B0
B1
B2
B3
B4
B5
B6
R17
102
B7
C2
102
1
b
Q1
9014
2
R9
ec
2
3
104
7
1
8
CLK_OUT
2
9
14
1
+5V
U5 74HC164/SOIC
3
GND
QA 4
QB 5
QC 6
A
CLK
QD 10
QE 11
QF 12
B
CLR
QG 13
VCC
QH
7
6
5
4
3
2
1
8
DATA_OUT
U6 ULN2003/SOIC
10
7B
7C 11
6B
6C 12
5B
5C 13
4C 14
4B
3C 15
3B
2B
2C 16
1B
1C 9
E
COM
C4
102
1
b
Q2
9014
2
R18
ec
2
3
104
74HC164 chips are used as shift registers, marked as U1, U5, and segments are driven
by ULN2003 and 9014. ULN2003 chips, Darlington Driver IC, are directly connected with
LED segments and are marked as U2, U6. All 74HC164 on the board are connected in
series. Only CMOS signals are received by these pins. All the segments will start to work
when clock line, data line and correct signal from DIMM_IN are correct.
Characters displayed and their corresponding codes are shown in the following table.
TABLE 2-1 CHARACTERS DISPLAYED AND THE CORRESPONDIGN CODES
Segment
Code
0x01
0x02
0x04
0x08
0x10
0x20
0x40
0x80
2.3 Data Ports Definition
FIGURE 2-5 DATA PORTS DEFINITION
DE-DP22811_Ver1.0_Page 4
© 2004-2010 Sure Electronics Inc
Hardware Detail
There’re two IDC sockets which are respectively marked as J1 and J2. J1 is the data
input interface and J2 data output interface. An info board can work separately when its
J1 is connected with J1 of the demo board and J2 is left open. When more boards are in
series, connect J1 of the next board with J2 of the previous board and all the boards can
work. Up to 4 boards are recommended to be connected in series. When over 4 boards
are connected in series, you must add auxiliary power to provide more current ensuring
normal working.
2.4 Auxiliary Power Interface
There’re two auxiliary power interfaces on this board. If the power supply used can
output higher enough current, 10-pin IDC cable is enough. If the power supply used
output low current and many boards are connected in series, it’s suggested to use wires
to connect the info boards and the driver board via auxiliary power interfaces, or the
current is not enough to drive these boards. Just feed the boards with +12V power
supply via auxiliary power interfaces. Make sure the polarity is correct.
FIGURE 2-6 AUXILIARY POWER INTERFACE
2.5 Data Buffer
74HC00 chip is used to buffer the clock and DIMM_IN signals since CMOS output signal
cannot drive multiple CMOS chips if the cable is too long.
FIGURE 2-7 DATA BUFFER
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0_Page 5
2.3" 2 Digit 7-Segment Red Display Board
2.6 Connection in Series
To cascade our signal enhancing board, please refer to the specific connection diagram
as follows:
FIGURE 2-7 CONNECTION IN SERIES
DE-DP22811_Ver1.0_Page 6
© 2004-2010 Sure Electronics Inc
2.3" 2 DIGIT 7-SEGMENT RED
DISPLAY BOARD
USER’S GUIDE
Chapter 3. Electrical Characteristics
y
Power supply recommended:
Input: AC100 to AC200 1A 50 to 60HZ
Output: DC 12V 3.25A
y
For over 4 panels, user must add auxiliary power on the auxiliary power ports, or
the 10pin communication port could not carry so much current.
y
Maximum clock frequency: 1MHz, 4 boards connected in series
y
Suggested Refresh Rate: less than 10Hz
y
Drive Current/segment: 18mA +3mA/-5mA, this value may be changed based on
the production batch, and the dot uses different current: 7mA +1mA/2mA
y
Drive Method: Fully static.
y
Connection Method: 74HC164 in series, SPI like interface.
y
Up to 4 boards are suggested to be connected in series.
y
Interface Voltage Level: VDD*0.8-VDD+0.5V, standard CMOS level. If you need
TTL/CMOS compatible interface in batch, please contact us but the quantity should
be no less than 100pcs.
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0_Page 7
2.3" 2 DIGIT 7-SEGMENT RED
DISPLAY BOARD
USER’S GUIDE
Chapter 4. Sample Codes
4.1 LED Segment Drive Demo Board’s Schematic
FIGURE 4-1 LED SEGMENT DRIVE DEMO BOARD’S SCHEMATIC
+5V
+5V
+5V
U1
472
MCLR
R3
OSC1
MCLR
SW
CLK
R5
472
22P
18
17
16
15
14
13
12
11
10
OSC1
+5V
R4
R6
472
472
ICSPDAT
ICSPCLK
DATA
DIMM
C1
104
C3
1
1
C2
RA1
RA0
OCS1/CLKIN
OCS2/CLKOUT
VDD
RB7/ICSPDAT
RB6/ICSPCLK
RB5
RB4
PIC16F54/SOIC
2
2
472
RA2
RA3
T0CLKI
MCLR/Vpp
VSS
RB0
RB1
RB2
RB3
1
1
2
3
4
5
6
7
8
9
R2
472
2
R1
22P
+5V
R7
J1
CON10B
1
3
5
7
9
2
4
6
8
10
472
POWER 1
3
5
DIMM 7
DATA
9
POWER
2 POWER
4
6
8
10 CLK
SW
R8
472
1
+12V
SW1
8
7
6
5
1
SW DIP-4
1
2
3
4
+5V
SW2
4
2C4
3
2
104
J2
2
1
+12V
+5V
CON2
U2 78M05/TO
J4
CON 6
SS34
VOUT
MCLR
+ C5
+5V
C8
C6
ICSPDAT
ICSPCLK
+
4
C7
VIN
3
1
1
1
2
GND
D1
1
1
DJ005B
1
2
3
1
J3
104
100UF/10V
2
2
100uF/16V
2
2
104
1
2
3
4
5
6
4.2 How to Connect Load
FIGURE 4-2 CONNECT LOAD
DE-DP22811_Ver1.0_Page 8
© 2004-2010 Sure Electronics Inc.
2.3" 2 Digit 7-Segment Red Display Board
TABLE 4-1 ENCODER POSITION SETTING
Output Voltage
DIP Switch Settings
5V
12V
0V
Note:
1.
2.
DIP switch only has the 3 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.
4.3 How to Display Data with PIC16F54 and PICC9.60 Compiler
Source code is shown below.
TABLE 4-2 SOURCE CODE
C code:
#include<pic.h>
__CONFIG(RC & WDTEN & UNPROTECT);
#define uchar unsigned char
#define uint unsigned int
#define DATA RB5
#define CLK RB3
#define EN RB4
#define keydown RB2
const uchar
TAB[19]={0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x3f,0x01,0x02,0x04,0x08,0x
10,0x20,0x40,0xff,0x00};
//character library
uchar n;
uchar flag_g;
void delayus(uchar i)
{
while(i--);
}
void init(void)
{
TRISA=0;
RA2=1;
TRISB=0B00000100;
CLK=0;
OPTION=0B11000111;
n=0;
flag_g=0;
}
void sent_data(uchar sdata)
{
uchar i;
EN=1; //turn off the display, write data to be displayed
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0_Page 9
Sample Codes
for(i=0;i<8;i++)
{
CLK=0;
delayus(5);
if((sdata&0x80)==0x80) DATA=1;
else DATA=0;
sdata=(sdata<<1);
CLK=1;
delayus(5);
}
CLK=0;
EN=0; //turn on the display
}
void delaytime(uchar i)
{
uint j;
for(;i>0;i--)
for(j=0;j<400;j++)asm("clrwdt");
}
void scankey(void)
{
uchar i,j;
if(keydown==0)
{
delaytime(25);
if(keydown==0)
{
while(keydown!=1) asm("clrwdt");
n++;
n=n%18;
for(i=0;i<19;i++)
{
for(j=0;j<16;j++)
{
sent_data(TAB[i]);
}
delaytime(200);
}
}
}
}
void main()
{
init();
while(1)
{
asm("clrwdt");
scankey();
}
}
DE-DP22811_Ver1.0_Page 10
© 2004-2010 Sure Electronics Inc
2.3" 2 DIGIT 7-SEGMENT RED
DISPLAY BOARD
USER’S GUIDE
Chapter 5. Mechanical Drawing
FIGURE 5-1 MECHANICAL DRAWING
© 2004-2010 Sure Electronics Inc.
DE-DP22811_Ver1.0_Page 11
2.3" 2 DIGIT 7-SEGMENT RED
DISPLAY BOARD
USER’S GUIDE
Chapter 6. Contact Us
Sure Electronics Co., Ltd.
East zone, 3F, Building 6
Jingang Technology Innovation Center
No.108 Ganjiabian Rd (ZIP: 210000)
Qixia District
Nanjing
P.R.China
Tel:
+86-25-68154800-860
Fax:
+86-25-68154891-832
Website:
www.sure-electronics.com
Email:
[email protected]
DE-DP22811_Ver1.0_Page 12
© 2004-2010 Sure Electronics Inc.