OLED DISPLAY MODULE
Application Notes
PRODUCT
NUMBER
DD-6448BE-1B with EVK board
Copyright ©2007 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data
TABLE OF CONTENTS
1 EVK SCHEMATIC..........................................................................................................4
2 SYMBOL DEFINITION .................................................................................................5
3 TIMING CHARACTERISTICS ....................................................................................6
4 CONNECTION BETWEEN OLED AND EVK ........................................................... 7
5 HOW TO USE THE DD-6448BE-1B ............................................................................9
5.1 R
ECOMMENDED INITIAL CODE .................................................................................. 10
Product No.
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DD-6448BE-1B REV. A
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REVISION RECORD
Rev. Date Page Chapt. Comment ECR no.
A 10 Jan 07 First Issue
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DD-6448BE-1B REV. A
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1 EVK Schematic
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2 Symbol Definition
Note: The EVK has been hard wired to 8080 parallel interface
D0-D7：These pins are 8-bit bi-directional data bus to be connected to the MCU’s data bus.
E/RD#：This pin is MCU interface input. When connecting to an 8080-microprocessor, this pin
receives the Read (RD) signal. Data read operation is initiated when this pin is pulled low and the chip
is selected.
R/W#：This pin is MCU interface input. When 8080 interface mode is selected, this pin is the Write
(WR) input. Data write operation is initiated when this pin is pulled low and the chip is selected.
D/C#：This pin is Data/Command control pin. When the pin is pulled high, the data at D0-D7 is
treated as display data. When the pin is pulled low, the data at D0-D7 is transferred to the command
register. For detail relationship to MCU interface signals, please refer to the timing characteristics
diagrams at following pages and datasheet.
RES#：This pin is reset signal input. When the pin is low, initialization of the chip is executed.
CS#：This pin is the chip select input. The chip is enabled for MCU communication only when CS is
pulled low.
HV: This is the most positive voltage supply pin of the chip.
LV：Power supply pin for logic operation of the driver.
VCC：This is the most positive voltage supply pin of the chip.
VSS：This is the ground pin and also acts as a reference for logic pins and OLED driving voltages.
This should be connected to the external ground
VCOMH：
should be connected between this pin and VSS.
NC：Dummy pad, do not group or short NC pins together.
This is an input pin for the voltage output high level for COM signals. A capacitor
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3 Timing characteristics
VDD = 2.4 to 3.5V, TA= -40to 85°C
Table 3 8080-Series MPU Parallel Interface Timing Characteristics
Figure 1 8080-series MPU parallel interface characteristics
Product No.
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4 Connection Between OLED and EVK
Figure 2 EVK PCB and DD-6448BE-1B Module
Figure 3 the DD-6448BE-1B and EVK assembled (Top view)
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As the package is TCP, the connector pads are double sided. When assembling the OLED,
make sure it in the right direction as shown in Figure 3 and tightened with the two hexagonal
bolts.
Figure 4 control MCU (not supplied) connected with EVK
Note 1：It is the external most positive voltage supply. In this sample is connected to power
supply.
Product No.
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5 How to use the DD-6448BE-1B
Product No.
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DD-6448BE-1B REV. A
Reset Set
RES#=0; Delay 10ms; RES#=1
Initial IC
code
Suggest all registers set again
Display on
Clear RAM
Start
sending
data
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5.1 Recommended Initial code
void initial(void)
{
BS1=1; // use 8080 interface
BS2=1;
DC=0;
WR=0;
RD=0;
CS=0;
RES=0;
delay(100);
RES=1;
write_c(0xAE); //display off
write_c(0x81); //set contrast
write_c(0xff); //max current
write_c(0xa8); //set duty
write_c(0x3F); //duty 63
write_c(0xA0); //Set Segment Re-map
write_c(0xd3); //display offset
write_c(0x00); //set 00
write_c(0x40); //Start line
write_c(0xC8); //Set COM Output Scan Direction
write_c(0xda); //Set COM pins hardware configuration
write_c(0x12); //Set COM pins hardware configuration
write_c(0xD9); //Set precharge
write_c(0xf1); //precharge=fh , discharge=1h
write_c(0xDB); //Set VcomH
write_c(0x49); //VcomH=73
write_c(0xA4); //Normal Mode
write_c(0xA6); //No Inverse
write_c(0xAF); //display on
}
void write_c(unsigned char ins_c)
{
DC=0;
CS=0;
RD=1; /*tell system only write*/
WR=0;
d_bus=ins_c;
WR=1;
CS=1;
DC=1;
}
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void write_d(unsigned char ins_d)
{
DC=1;
CS=0;
RD=1; /*tell system only write*/
WR=0;
d_bus=ins_d;
CS=1;
WR=1;
DC=1;
}
void delay(int count)
{
int i,j;
for(i=0;i<=count;i++)
for(j=0;j<=1000;j++)
;
}
＊write_c= Write Command , write_d= Write Data
Product No.
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