NHD-1.69-160128UGC3 display not turning ON

Apurva Agre

Hello,

In one of our projects, we want to use the NHD-1.69-160128UGC3 with the ATSAM51. For prototype testing, we ordered one NHD-1.69-160128UGC3, but after applying 3.3V to the VDD of the display, it does not turn on. We want to use the 4-wire SPI interface, and connections are made according to the NHD-1.69-160128UGC3 datasheet wiring diagrams (page 5).

At first, we applied 3.3V from the SAM E51 Curiosity Nano eval board without SPI connections, but the display did not turn on. We checked the voltage across C3, C4, and C8, and it shows 3.3V. We then applied 3.3V from a power supply, but the display still does not turn on. Are there any other steps we should take?

Regards,

Apurva Agre

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  • Engineering Support
    Community moderator

    Hi Apurva,

    Apologies for the late response.  In addition to applying 3.3V to the display's VDD pin, you also need to send a series of instructions to the display through the SPI interface in order to turn the display on.  Below is the recommended initialization instructions that need to be sent to the display to turn it on.  You may also refer to our example code for this display for additional information.

    void OLED_Init_160128RGB(void)      //OLED initialization
{
    digitalWrite(RES_PIN, LOW);
    delay(2);
    digitalWrite(RES_PIN, HIGH);
    delay(2);
    
    // display off, analog reset
    OLED_Command_160128RGB(0x04);
    OLED_Data_160128RGB(0x01);
    delay(1);
    
     // normal mode
    OLED_Command_160128RGB(0x04); 
    OLED_Data_160128RGB(0x00); 
    delay(1);
    
    // display off
    OLED_Command_160128RGB(0x06);
    OLED_Data_160128RGB(0x00);
    delay(1);
    
    // turn on internal oscillator using external resistor
    OLED_Command_160128RGB(0x02);
    OLED_Data_160128RGB(0x01); 
    
    // 90 hz frame rate, divider 0
    OLED_Command_160128RGB(0x03);
    OLED_Data_160128RGB(0x30); 
    
    // duty cycle 127
    OLED_Command_160128RGB(0x28);
    OLED_Data_160128RGB(0x7F);
    
    // start on line 0
    OLED_Command_160128RGB(0x29);
    OLED_Data_160128RGB(0x00); 
    
    // rgb_if
    OLED_Command_160128RGB(0x14);
    OLED_Data_160128RGB(0x31); 
    
    // Set Memory Write Mode
    OLED_Command_160128RGB(0x16);
    OLED_Data_160128RGB(0x76);
    
    // driving current r g b (uA)
    OLED_Command_160128RGB(0x10);
    OLED_Data_160128RGB(0x45);
    OLED_Command_160128RGB(0x11);
    OLED_Data_160128RGB(0x34);
    OLED_Command_160128RGB(0x12);
    OLED_Data_160128RGB(0x33);
    
    // precharge time r g b
    OLED_Command_160128RGB(0x08);
    OLED_Data_160128RGB(0x04);
    OLED_Command_160128RGB(0x09);
    OLED_Data_160128RGB(0x05);
    OLED_Command_160128RGB(0x0A);
    OLED_Data_160128RGB(0x05);
    
    // precharge current r g b (uA)
    OLED_Command_160128RGB(0x0B);
    OLED_Data_160128RGB(0x9D);
    OLED_Command_160128RGB(0x0C);
    OLED_Data_160128RGB(0x8C);
    OLED_Command_160128RGB(0x0D);
    OLED_Data_160128RGB(0x57);
    
    // Set Reference Voltage Controlled by External Resister
    OLED_Command_160128RGB(0x80);
    OLED_Data_160128RGB(0x00);
    
    // mode set
    OLED_Command_160128RGB(0x13);
    OLED_Data_160128RGB(0xA0);
    
    OLED_SetColumnAddress_160128RGB(0, 159);
    OLED_SetRowAddress_160128RGB(0, 127);

    // Display On
    OLED_Command_160128RGB(0x06);
    OLED_Data_160128RGB(0x01); 
}

    Please let us know if this helps.

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