TIDUF06 August   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
          4. 2.2.2.2.4 Functional Safety
    3. 2.3 Highlighted Products
      1. 2.3.1 DS90UB953-Q1
      2. 2.3.2 TPS650330-Q1
      3. 2.3.3 IMX623
    4. 2.4 System Design Theory
  8. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Required Hardware
      1. 3.1.1 Hardware Setup
      2. 3.1.2 FPD-Link III I2C Initialization
      3. 3.1.3 IMX623 Initialization
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
        1. 3.2.1.1 Power Supplies Startup
        2. 3.2.1.2 Power Supply Startup – 1.8 V Rail and Serializer PDB Setup
      2. 3.2.2 Test Results
        1. 3.2.2.1 Power Supplies Start Up
        2. 3.2.2.2 Power Supply Output Voltage Ripple
        3. 3.2.2.3 Power Supply Load Currents
        4. 3.2.2.4 I2C Communications
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 PMIC Layout Recommendations
      2. 4.3.2 PCB Layer Stackup
      3. 4.3.3 Serializer Layout Recommendations
      4. 4.3.4 Imager Layout Recommendations
      5. 4.3.5 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Related Documentation
  11. 6Trademarks

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-050060 camera module. Once all rails are established, all devices (IMX623, DS90UB953-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 DS90UB953-Q1 serializer are as follows:

# Set up Port0
board.WriteI2C(UB954, 0x4C, 0x01)

# Set up Back Channel Config (0x58)
board.WriteI2C(UB954,0x58,0x5E)

# Set up SER ID
board.WriteI2C(UB954,0x5B,UB953ID)
# Set up SER Alias ID
board.WriteI2C(UB954,0x5C,UB953)
# Set up Slave/Camera ID
board.WriteI2C(UB954,0x5D,SensorID)
# Set up Slave/Camera Alias ID
board.WriteI2C(UB954,0x65,Sensor)

# Set up CLK_OUT from 50 Mbps BC frequency
board.WriteI2C(UB953,0x06,0x22)
board.WriteI2C(UB953,0x07,0xA7)

time.sleep(0.1)

# Set GPIO1 to output, where GPIO1 = RESET
board.WriteI2C(UB953,0x0E,0x1E)

# Set GPIO1 to High - bring sensor out of power down mode
board.WriteI2C(UB953,0x0D,0x01)