DENSITRON DD-12864WE-1A Product Specification

OLED DISPLAY MODULE

Application Notes

PRODUCT

NUMBER

DD-12864WE-1A with EVK board

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-12864WE-1A.......................................................................... 9

5.1 R

ECOMMENDED INITIAL CODE .................................................................................. 10

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REVISION RECORD

Rev. Date Page Chapt. Comment ECR no.

A

8th May

2007

First Issue

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1 EVK Schematic

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2 Symbol Definition

D0-D7：These pins are 8-bit bi-directional data bus to be connected to the MCU’s data bus.

CS#：This pin is the chip select input. The chip is enabled for MCU communication only when CS is

pulled low.

C86, PS: These input pins are used to configure the MCU interface selection by appropriate logic setting, which is described in the following table. But in this EVK, which was fixed as 80-parallel

interface.

6800 Parallel Interface 8080 Parallel Interface Serial Interface

C86 0 1 0

PS 1 1 0

RD: NOTE: The EVK board has been hard wired to 80xx-parallel interface

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. When serial interface is selected, this pin E(RD) must be connected to VSS or VDD. The EVK has fixed as 80 series

interface, so this pin just only for 80 series interface read function.

WR:

When 8080 interface mode is selected, this pin will be the Write (WR) input. Data write operation is initiated when this pin is pulled low and the chip is selected. When serial interface is selected, this pin R/W must be connected to VSS or VDD. The EVK has fixed as 80 series interface, so this pin just

only for 80 series interface write function.

A0: 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 will be transferred to the command register. For detail relationship to MCU interface signals, please refer to the timing characteristics diagrams at the following pages and datasheet.

RES: This pin is reset signal input. When the pin is low, initialization of the chip is executed.

HV: This is the most positive voltage supply pin of the chip.

LV: Power supply pin for logic operation of the driver

GND: Power supply ground

DC IN: This is an internal DC-DC voltage converter of low voltage supply input V

DC-OUT: This is an internal DC-DC voltage converter can generate a high voltage supply HV from a

low voltage supply input (V

DD2)

VCOMH: The voltage output high level for signals

IREF: Current setting

DD2

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3 Timing characteristics

Figure 1: 8080-series MPU parallel interface characteristics

Table 1: 8080-Series MPU Parallel Interface Timing Characteristics

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4 Connection Between OLED and EVK

Figure 2 EVK PCB and DD-12864WE-1A Module

Figure 3 the DD-12864WE-1A and EVK assembled (Top view)

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The DD-12864WE-1A is COG type, please refer to Fig 2, Fig3. User can use leading wire to connect EVK with customers system. The example shows as Fig 4. Note1: Refer to Symbol define Note 2: J5, J6 must be connected by Jump.

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 (HV) Note 2: It is the power supply pin for logic operation of the driver (LV) Note 3: The leading wire has 3 pins totally in this case. (D0-D7, RD, WR, A0, RES, CS)

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5 How to use the DD-12864WE-1A

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Reset Set

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

Initial IC

code

Suggest all registers set again

Clear RAM

Display On

Start

sending

data

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5.1 Recommended Initial code

RD recommend Initial Code: void init(void) { unsigned char i,j;

write_c(0xa0); //segment remap write_c(0xda); //common pads hardware: alternative write_c(0x12); write_c(0xc0); //common output scan direction:com0~com127 write_c(0xa8); //multiplex ration mode:63 write_c(0x3f); write_c(0xd5); //display divide ratio/osc. freq. mode write_c(0x50); //Osc. Freq:5,DivideRation:0 write_c(0xdb); //VCOM deselect level mode:64 write_c(0x40); write_c(0x81); //contrast control mode:64 write_c(0x40); write_c(0xad); //DCDC control mode:off write_c(0x8a); //=====clear internal RAM to "00H”=========// for(i=0;i<=7;i++) { write_c (0xb0+ i ); write_c (0x02); write_c (0x10); for(j=0;j<=131;j++) write_data(0); } //==================================// write_c(0xaf); //display on Delay_1ms(10); write_c(0x40); //display start line:0 write_c(0xa4); //0xa4:normal display , 0xa5:entire display write_c(0xa6); //0xa6:normal display , 0xa7:reverse display write_c(0xd3); //display offset mode:0 write_c(0x00); write_c(0xd9); //discharge / precharge period mode write_c(0x1f); //discharge:1,precharge:0x15 for(i=0;i<=7;i++) { write_c (0xb0+ i ); //set page address write_c (0x02); //column low bits write_c (0x10); //column high bits for(j=0;j<=127;j++) write_d (0xff); } }

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void write_c (unsigned char comm) { data_bus=comm; A0=0; CS=0; RD=1; WR=0; WR=1; CS=1; } void write_d (unsigned char data1) { data_bus=data1; A0=1; CS=0; RD=1; WR=0; WR=1; CS=1; A0=1; } void Delay_1ms(int Cycle) { unsigned int i,k; for (i=0;i<Cycle;i++) for(k=0;k<0x5fff;k++); }  write_c= Write Command  write_d= Write Parameter

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DENSITRON DD-12864WE-1A Product Specification

Specifications and Main Features

Frequently Asked Questions

User Manual