TIDUBF0 January   2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  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 PCB and Form Factor
      2. 2.2.2 Power Supply Design
        1. 2.2.2.1 POC Filter
        2. 2.2.2.2 Power Supply Considerations
          1. 2.2.2.2.1 Choosing External Components
          2. 2.2.2.2.2 Choosing the Buck 1 Inductor
          3. 2.2.2.2.3 Choosing the Buck 2 and Buck 3 Inductors
        3. 2.2.2.3 Functional Safety
    3. 2.3 Highlighted Products
      1. 2.3.1 OX01F10 Imager
      2. 2.3.2 DS90UB933-Q1
      3. 2.3.3 TPS650320-Q1
    4. 2.4 System Design Theory
  8. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 Hardware Setup
      2. 3.1.2 FPD-Link III I2C Initialization
      3. 3.1.3 OX01F10 Initialization
    2. 3.2 Test Setup
      1. 3.2.1 Power Supplies Start Up
      2. 3.2.2 Setup for Verifying I2C Communications
    3. 3.3 Test Results
      1. 3.3.1 Power Supplies Start-Up
      2. 3.3.2 Power Supply Start-Up—1.8-V Rail and PDB
      3. 3.3.3 Power Supply Voltage Ripple
      4. 3.3.4 Power Supply Load Currents
      5. 3.3.5 I2C Communications
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 Bill of Materials
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
        2. 4.1.3.2 PMIC Layout Recommendations
        3. 4.1.3.3 Serializer Layout Recommendations
        4. 4.1.3.4 Imager Layout Recommendations
        5. 4.1.3.5 PCB Layer Stackup Recommendations
      4. 4.1.4 Altium Project
      5. 4.1.5 Gerber Files
  10. 5Tools and Software
  11. 6Documentation Support
  12. 7Support Resources
  13. 8Trademarks

3.1.2 FPD-Link III I2C Initialization

With the setup in Figure 3-2 connected, the DS90UB954-Q1 EVM is supplied 12-V input power, which is regulated to 9-V with an onboard LDO and delivered through POC to power the TIDA-050050 camera module. Once all rails are established, all devices (OX01F10, DS90UB933-Q1, and DS90UB954-Q1) receive power. Then, the I2C writes for initialization can begin. Note that the following writes are only showing one channel camera and may not be the mode wanted for specific multi-camera mode. The Analog LaunchPad compatible Python® script to initialize the DS90UB954-Q1 deserializer and DS90UB933-Q1 serializer are as follows:

# Set up Port1
board.WriteI2C(UB954, 0x4C, 0x12)

# Set up Back Channel Config (0x58)
board.WriteI2C(UB954,0x58,0x58)

# Set up SER Alias ID
board.WriteI2C(UB954,0x5C,UB933)

# Set up Slave/Camera ID
board.WriteI2C(UB954,0x5D,SensorID)

# Set up Slave/Camera Alias ID
board.WriteI2C(UB954,0x65,Sensor)

# Set GPIO2 output high, where GPIO2 = XSHUTDOWN
board.WriteI2C(UB933,0x0D,0x95)