TIDUEW7 May   2020

 

  1.    Description
  2.    Resources
  3.    Features
  4.    Applications
  5.    Design Images
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Processor – i.MX 6ULL Applications Processor
      2. 2.2.2 i.MX 6ULL Memory Interfaces
        1. 2.2.2.1 DDR3L
        2. 2.2.2.2 Quad SPI NOR Flash
        3. 2.2.2.3 eMMC iNAND
        4. 2.2.2.4 SD Card Connector
      3. 2.2.3 USB to UART Converter
      4. 2.2.4 USB Ports
      5. 2.2.5 LCD Screen Connector
      6. 2.2.6 JTAG Header
      7. 2.2.7 USB2ANY Header
      8. 2.2.8 Functional Switches and Status LEDs
      9. 2.2.9 GPIO Expansion Connector
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS6521815 - Power Management IC
      2. 2.3.2 DP83849I - Dual Ethernet PHY
      3. 2.3.3 INA3221 - Current Monitor
      4. 2.3.4 Reset Scheme
      5. 2.3.5 TPS2054B, TPS22964C - Auxiliary Load Switches
    4. 2.4 System Design Theory
      1. 2.4.1 Power Estimation
      2. 2.4.2 Power Sequencing
      3. 2.4.3 I2C Device Chain
      4. 2.4.4 Clock Scheme
      5. 2.4.5 BOOT Configuration
      6. 2.4.6 PCB Floor Planning
  8. 3Getting Started, Testing Setup, and Test Results
    1. 3.1 Getting Started with Hardware and Software
      1. 3.1.1 Hardware
        1. 3.1.1.1 On-board LED Information
      2. 3.1.2 Software
        1. 3.1.2.1 Booting of TIDA-050043
        2. 3.1.2.2 Example Linux Commands for Testing TIDA-050043
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 CAD Files
    4. 4.4 Gerber Files
    5. 4.5 Assembly Drawings
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 Trademarks
    2. 6.2 Third-Party Products Disclaimer

2.2.5 LCD Screen Connector

This design has a mountable LCD screen. The i.MX 6ULL processor's LCD interface can be used to control a wide range of display devices varying in size and capability. Many of these displays have an asynchronous parallel MPU interface for command and data transfer to an integrated frame buffer. There are other popular displays that support moving pictures and require the RGB interface mode (called DOTCLK interface in this document) or the VSYNC mode for high-speed data transfers. In addition to these displays, it is also common to provide support for digital video encoders that accept ITU-R BT.656 format. The goal is to select an LCD screen that is suitable for the application and compatible with the processor.

The Newhaven Display NHD-2.4-240320CF-CTXI#-F backlight and LCD screen selected for this design can make use of the already available 3.3 V and 1.8 V supply voltages so we can eliminate the need for additional voltage regulators. Additionally, this display is compatible with the processor and exceeds the simple requirements of a data concentrator application. The LCD interface is connected through 40-pin FPC connector. The connection diagram of the LCD interface is shown in Figure 8.

DESCRIPTION MFG. PART NUMBER
Display, TFT LCD, 240x320, 8/16-bit Parallel MPU Interface Newhaven Display NHD-2.4-240320CF-CTXI#-F
Conn, FPC, Receptacle, 1x40, 0.5mm, 0.5A, Bottom Contact, RA, SMD Hirose Electric Co Ltd FH40-50S-0.5SV
IC, TSC2046, Touch Screen Controller, TSSOP-16 Texas Instruments TSC2046IPWR(1)
(1) The touch-screen controller is optional and can be added to take advantage of the touch-screen capability of the display, but TSC2046 is not mounted in this design.
Figure 8. LCD Interface From i.MX 6ULL Processor to Connector TIDA-050043 tida-050043-lcd-tiduew7.gif