DENSITRON DD-6448DE-2A Product Specification

OLED DISPLAY MODULE

Application Notes

PRODUCT

NUMBER

DD-6448BE-2A with EVK board

TABLE OF CONTENTS

1 EVK SCHEMATIC..........................................................................................................4

2 SYMBOL DEFINITION .................................................................................................5

3 TIMING CHARACTERISTICS ....................................................................................6

4 HOW TO USE THE SSD1305Z.................................................................................... 12

5 HOW TO USE THE DD-6448BE-2A...........................................................................13

5.1 R

ECOMMENDED INITIAL CODE .................................................................................. 14

6 WRITE DATA & COMMAND SUB FUNCTION..................................................... 16

Product No.

DD-6448BE-2A REV. A

Page 2 / 16

REVISION RECORD

Rev. Date Page Chapt. Comment ECR no.

A 4th Sep 2007 First Issue

Product No.

DD-6448BE-2A REV. A

Page 3 / 16

1 EVK Schematic

Product No.

DD-6448BE-2A REV. A

Page 4 / 16

2 Symbol Definition

VCC : Power supply for panel driving voltage.

VSS：This is ground pin.

VDD：Power supply for core logic operation.

VDDIO：Power supply for interface logic level.

BS0~BS2：MUC bus interface selection pin(BS0 pulled LOW in internal).

CS：This pin is chip select input(active LOW).

RES：This pin is reset signal input(active LOW).

D/C：This is DATA/COMMAND control pin. When it is Pulled HIGH, the data at D[0~7] is treated as data. When it is pulled LOW, the data at D[0~7] will be transferred to the command

register. In I2C mode, this pin acts as SA0 for slave address select.

R/W：This is read/write control input pin connecting to the MCU interface. When interface to a 6800-series microprocessor , Read mode will be carried out when this pin is

pulled HIGH and write mode when low . When interface to an 8080-microprocessor , this pin when be the data Write input. When serial interface is selected, this pin must be connected to Vss.

E/RD：When interface to a 6800-series microprocessor , this pin will be used as the Enable(E) signal. When interface to an 8080-microprocessor , this pin receives the

Read(RD#)signal.

D0~D7：These are 8-bit bi-directional data bus to be connected to the microprocessor’s data bus. When serial interface mode is selected, D0(SCLK) will be the serial clock

input,D1(SDIN) will be the serial data input,D2 should be left opened. When I2C mode is selected,D1(SDAin) AND D2(SDAout) should be tied together,D0(SCL) is the I2Cclock input

IREF：This is segment output current reference pin.

VCOMH：This pin for COM signal deselected level voltage.

Product No.

DD-6448BE-2A REV. A

Page 5 / 16

3 Timing characteristics

3.1.1 6800 Interfacing description and timing characteristics

Product No.

DD-6448BE-2A REV. A

Page 6 / 16

3.1.2 8080 Interfacing descriptions and timing characteristics

Product No.

DD-6448BE-2A REV. A

Page 7 / 16

3.1.3 SPI Interfacing and Descriptions Characteristics

Product No.

DD-6448BE-2A REV. A

Page 8 / 16

3.1.4 I2C Interfacing and Descriptions Characteristics

Product No.

DD-6448BE-2A REV. A

Page 9 / 16

Connection Between OLED and EVK

Figure 1 EVK PCB and DD-6448BE-2A Module

Figure 2 the DD-6448BE-2A and EVK assembled (Top view)

The SSD1305Z is a COG type package, that the connect pads are on top of the module connector. When assembled the module and EVK push the locking pad to lock the module.

Product No.

DD-6448BE-2A REV. A

Page 10 / 16

See Figure 1 and 2. The user can use the leading wire to connect EVK with the customers application. The example is shown in Figure 3.

Figure 3 EVK with test platform.

Note 1：It is the external most positive voltage supply. In this sample is connected to power supply.

Note 2: The leading wire has 13 pins totally in this case. (D0~D7 – E/RD – R/W – D/C – RES – CS)

Note 3: Select Mode (8080 – 6800 – SPI – I2C)

Product No.

DD-6448BE-2A REV. A

Page 11 / 16

4 How to use the SSD1305Z

4.1.1 Power down and Power up Sequence

To protect the OLED panel and extend the panel life time the driver IC power up/down routine should include a delay period between high voltage and low voltage power sources during turn off. Such that the panel has enough time to charge up or discharge before/after operation.

Product No.

DD-6448BE-2A REV. A

Page 12 / 16

play

5 How to use the DD-6448BE-2A

Reset Driver

IC

Product No.

DD-6448BE-2A REV. A

Driver IC

Initial Code

Display on

Clear RAM

Start

Dis

RES#=0; Delay 10ms; RES#=1

Suggest all registers set again

Page 13 / 16

5.1 Recommended Initial code

void initial()

{ write_command(0x02);//set low column address

write_command(0x12);//set high column address

write_command(0x40);//(display start set)

write_command(0x2e);//(stop horzontal scroll)

write_command(0x81);//(set contrast control register) write_command(0x32);

write_command(0x82);//(brightness for color banks) write_command(0x80);//(display on)

write_command(0xa1);//(set segment re-map)

write_command(0xa6);//(set normal/inverse display)

write_command(0xa8);//(set multiplex ratio) write_command(0x2F);

write_command(0xd3);//(set display offset) write_command(0x40);

write_command(0xad);//(set dc-dc on/off) write_command(0x8E);//

write_command(0xc8);//(set com output scan direction)

write_command(0xd5);//(set display clock divide ratio/oscillator/frequency) write_command(0xf0);//

write_command(0xd8);//(set area color mode on/off & low power display mode ) write_command(0x05);//

write_command(0xd9);//(set pre-charge period) write_command(0xF1);

write_command(0xda);//(set com pins hardware configuration) write_command(0x12);

write_command(0xdb);//(set vcom deselect level)

Product No.

DD-6448BE-2A REV. A

Page 14 / 16

write_command(0x34);

write_command(0x91);//(set look up table for area color) write_command(0x3f); write_command(0x3f); write_command(0x3f); write_command(0x3f);

write_command(0xaf);//(display on)

write_command(0xa4);//(display on)

}

Product No.

DD-6448BE-2A REV. A

Page 15 / 16

6 WRITE DATA & COMMAND SUB FUNCTION

void write_command(unsigned char aa)

{

IOCLR = 0x000000ff; IOSET = RD_IN;//RD=1

IOCLR = DC_IN;//RS=0 IOCLR = CS_IN;//CS=0 IOCLR = WR_IN;//W_R=0

IOSET = aa;//--------input command

IOSET = WR_IN;//W=1 IOSET = CS_IN;//CS=1 IOCLR = RD_IN;

}

void write_data(unsigned char bb)

{

IOCLR = 0x000000ff;

IOSET = RD_IN;//RD=1 IOSET = DC_IN;//RS=1 IOCLR = CS_IN;//CS=0 IOCLR = WR_IN;//W_R=0

IOSET = bb; //--------input data

IOSET = WR_IN;//W_R=1 IOSET = CS_IN;//CS_1=1

}

NOTE: RD recommended initial code and sub function for 8080 series CPU interface

Product No.

DD-6448BE-2A REV. A

Page 16 / 16

DENSITRON DD-6448DE-2A Product Specification

Specifications and Main Features

Frequently Asked Questions

User Manual