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

2.3.2 DP83849I - Dual Ethernet PHY

i.MX 6ULL supports two 10/100Mbps (MII/RMII) Ethernet interfaces. This design requires two 100 Base-T Ethernet ports so the DP83849I-Dual Ethernet PHY is used in this design. This Ethernet PHY supports two RMII interface and able to work from a single 3.3V supply. The PHY needs an external 50MHz oscillator to function properly. To connect MDI to the Cat5e cable, we used a dual RJ45 connector with internal magnetics from Wurth Elektronik. The addresses for the two separate PHYs are listed in Table 2.

Table 2. PHY Addresses

PHY Number PHY Address
PHY1 0b00000
PHY2 0b00001

The Ethernet interface connections are shown in Figure 12.

DESCRIPTION MFG. PART NUMBER
IC, DP83849I, Dual Port, 10/100 Ethernet PHY Transceiver, TQFP-80 Texas Instruments DP83849IVSX/NOPB
Connector, RJ45 Jack with Magnetics, Shielded, LED(G/Y, G/Y), RA, TH Wurth Elektronik 7499111446
Figure 12. Ethernet Interface With DP83849I PHYTIDA-050043 tida-050043-ethernet-tiduew7.gif