EVK-CONNECT-022

OLED DISPLAY MODULE Application Notes PRODUCT NUMBER DD-2832BE-2A with EVK board Copyright ©2006 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-2832BE-2A ............................................................................. 9 5.1 RECOMMENDED INITIAL CODE .................................................................................. 10 Product No. DD-2832BE-2A REV. A Page 2 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data REVISION RECORD Rev. Date A 20-June-06 Product No. Page Chapt. Comment ECR no. First Issue DD-2832BE-2A REV. A Page 3 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 1 EVK Schematic Product No. DD-2832BE-2A REV. A Page 4 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 2 Symbol Definition Note: The EVK is 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 will be 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 D7D0 is treated as display data. When the pin is pulled low, the data at D7-D0 will be transferred to the command register. For detail relationship to MCU interface signals, please refer to the timing characteristics diagrams. 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. VCC：This is the most positive voltage supply pin of the chip. VDD：Power Supply pin for logic operation of the driver. VSS：This is a ground pin. It also acts as a reference for the logic pins and the OLED driving voltages. It must be connected to external ground. VCOMH：This is an input pin for the voltage output high level for COM signals. A capacitor should be connected between this pin and VSS. NC：Dummy pad. Do not group or short NC pins together. Product No. DD-2832BE-2A REV. A Page 5 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 3 Timing characteristics VDD = 2.4 to 3.5V, TA= -40to 85°C Table 2 8080-Series MPU Parallel Interface Timing Characteristics Figure 1 8080-series MPU parallel interface characteristics Product No. DD-2832BE-2A REV. A Page 6 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 4 Connection Between OLED and EVK Figure 2 EVK PCB and DD-2832BE-2A Module Figure 3 the DD-2832BE-2A and EVK assembled (Top view) REV. A DD-2832BE-2A Product No. Page 7 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 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. DD-2832BE-2A REV. A Page 8 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 5 How to use the DD-2832BE-2A Reset Set RES#=0; Delay 10ms; RES#=1 Initial IC code Suggest all registers set again Display on Clear RAM Start sending data Product No. DD-2832BE-2A REV. A Page 9 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 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(0x1F); //duty 31 write_c(0xA0); //Set Segment Re-map write_c(0xd3); //display offset write_c(0x20); //set 32 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; } Product No. DD-2832BE-2A REV. A Page 10 / 11 Copyright ©2005 DENSITRON TECHNOLOGIES plc. All rights reserved. – Proprietary Data 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