SPRABN2A March   2019  – December 2019 AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3358-EP , AM3359

 

  1.   AM335x Schematic Checklist
    1.     Trademarks
    2. 1 Introduction
    3. 2 Recommendations Specific to AM335x
      1. 2.1  Unused Signals
      2. 2.2  SYSBOOT Configuration and Required Termination
      3. 2.3  System Issues
        1. 2.3.1 Pinmux
        2. 2.3.2 Pullups
        3. 2.3.3 General Debug
        4. 2.3.4 Warm Reset
        5. 2.3.5 Peripheral Clocking
      4. 2.4  Low-Power Considerations
      5. 2.5  Clocking
      6. 2.6  General DDR Guidelines
        1. 2.6.1 DDR2
        2. 2.6.2 DDR3
      7. 2.7  MultiMedia Card/ (MMC)
      8. 2.8  Inter-Integrated Circuit (I2C)
      9. 2.9  LCD
      10. 2.10 Power
      11. 2.11 Touchscreen
        1. 2.11.1 If ADC/Touchscreen is not Used
      12. 2.12 USB
        1. 2.12.1 If USB0 or USB1 is not Used
      13. 2.13 External Interrupt (EXTINTn)
      14. 2.14 Ethernet
    4. 3 References
  2.   Revision History

LCD

Be sure to consult the silicon errata for the proper pinout of the LCD interface. There is a usage note titled, "LCD: Color Assignments of LCD_DATA Terminals" in the device Silicon Errata.

Note that the AM335x EVM "fixes" the pin mapping through a CPLD on the daughterboard, so be extra careful to get the proper mapping!

  • A good example of a 24-bit hookup comes from the AM335x Starter Kit shown in Figure 1.
  • sprabn2_fig1.gifFigure 1. AM335x Starter Kit, 24-Bit LCD
  • A good example of a 16-bit hookup comes from the BeagleBone Black that is shown in Figure 2. In this case, the other LCD pins were preserved for use by capes.
  • sprabn2_fig2.gifFigure 2. BeagleBone Black, 16-Bit LCD
  • Notice that Red and Blue swap positions depending on whether you are outputting in 16-bit mode vs 24-bit mode (that is, the errata).