Documentation:EVK1100/LCD

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[edit] Description

The EVK1100 provides a 4x20 LCD to design Human to Machine Interface for software developments. The LCD reference is the EA-DIP204B-4NLW, a white/blue screen with 4 lines of 20 characters.
ADJ2 potentiometer can be used to adjust backlight.


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[edit] Pinout

The LCD is used as a SPI component.
The pinout is as follow :

LCD Pin GPIO Name Alternate function used
5 PA 16 SPI1_MOSI
7 PA 17 SPI1_MISO
6 PA 15 SPI1_CLK
4 PA 19 SPI1_CS2
18 PB 18 PWM_6

see below the hardware schematic :

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[edit] Using the LCD

The following settings must be applied to use the LCD :

  • Configuration of the AT32UC3A0512 to use the SPI1 interface.
  • Configuration of the backlight power pin :
    • PWM channel : backlight intensity modulated by duty cycle or
    • GPIO : backlight ON/OFF.
  • Configuration of the LCD with application requirements.


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