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Original question:

DS90UB953-Q1: OV2724 does not output images to the monitor

DS90UB954-Q1: I2c，poc

kui cai
Prodigy 100 points
Part Number: DS90UB954-Q1

Hi, TI engineers.

             I am currently building my system with Raspberry Pi 4B, UB954, UB953 and sensor.

             The first question is about i2c. Currently I am using TI’s 953 and 954 EVM boards. When I use Raspberry Pi to detect i2c devices, why only the 953, 954 and sensor i2c addresses  appear on the bus? Why can't the msp 430 on the board be detected? Maybe msp 430 also exists as a master device? So is there a way to use a MCU similar to msp430 as a slave device?

             The second question is about the poc. There may be LED devices on our custom development board, plus the 953 and sensor will have a total power demand of about 3W. I want to transfer all the electrical energy through poc. I also checked the corresponding information.

                 Below is the corresponding information about capacitors and magnetic beads.

             What kind of power supply plan should I make? What is the voltage on the poc? Do I need to change specifications for inductors and magnetic beads?

  • 0
    TI__Guru** 108190 points

    Hello Kui,

    you are right, the MSP430 is the local Master on the board. I did not get you, you want to use this MCU as a slave?

    If you use 12V or 15V for you PoC then the max current on the link/PoC will be 200-250mA, which is absolutely okay for the recommended devices in the datasheet.

  • 0 in reply to Hamzeh Jaradat
    Prodigy 100 points

    Hello Hamzeh.

                     Thanks again for your time. Thank you for your answer regarding the poc.

                    Yes, I want to use a microcontroller (msp430, stm32) as a slave device of i2c (slave device of 953), which transmits the input information back to the Raspberry Pi through coax, and then the Raspberry Pi sends information to it Take control through coax. Is this achievable? Do you have any ideas? The microcontroller can be something like msp430 or stm32.

    KUI

  • 0 in reply to kui cai
    TI__Guru** 108190 points

    I am not sure if this or any other microcontroller can be used as a slave on the camera, but definitely you can use it if it supports a multi-master mode and clock-stretching, otherwise there will be collisions.