I2C Programming - How to ?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Richi_el
    Senior Member
    • Nov 2013
    • 95
    • Koln

    #1

    I2C Programming - How to ?

    Hello,

    can someone tell me more about i2c programming wich interface & software is used for.

    And the most important question is:
    Is it possible to read the i2c data from a device, to copy it to another device.

    The part wich i need programm is a TPS658621C

    https://pdf1.alldatasheet.net/datash...PS658621A.html

    here the dataheet, i already found the pins H4 and J2 for SDA & SCL for the connection ,but i dont know wich software and programmer is the right one.

    Thank you for support.
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30945
    • Albion

    #2
    Re: I2C Programming - How to ?

    are you sure that chip stores anything?
    the "A" version doesnt, it just has control registers that i assume are written when you power up the device.
    Attached Files

    Comment

    • Richi_el
      Senior Member
      • Nov 2013
      • 95
      • Koln

      #3
      Re: I2C Programming - How to ?

      Hello,
      thanks for your support.

      Maybee i have to tell the whole story about it

      i have 5 pcb`s from that device wich are not starting.
      (Industrial device, same like a notebook with touch panel)


      Normally the starting sequence on power supply:


      beginn 0,3Amp raise up to 0,55Amp and then the devie Start by 1,4Amp

      by this 5 pcbs i had some different starting sequencenes and the pcbs are not starting.

      3 x starting sequences goes from 0,3Amp - 0,5Amp raise up to 0,9Amp
      (the TPS658621C goes really hot) and it fall down again to 0,3 Amp

      2 x starting sequences goes from 0,3Amp - 0,5Amp


      so i decided to try to change the TPS658621C with new ones


      The result was that all 5 pcbs are makeing now this starting sequences:


      Start with 0,3 Amp raise to 0,65Amp and fall down again to 0,3Amp

      All 5 pcbs make exact the same starting sequences after change the TPS658621C and also that ones wich goes hot(the TPS658621C) is not getting hot after change but not starting .


      SO my result from that experiment was that the TPS658621C must be programmed and i looked to the datasheet and i saw that 11programmable mods are written in datasheet, and also that this ic is programmable with i2c interface....

      I thought its like a MCU programming maybee, so i was searching for the correct programmer ect.

      Maybee iam wrong, but why all devices have the same starting sequences after change TPS658621C =?

      I never do this before(i2c), but i did some emmc programmings ect.

      Note:

      By one of that devices i had also a problem by starting process:

      starting sequence was 0,3Amp - 0,5Amp and not starting...

      after reflow the TPS658621C (balled) the device started normally
      0,3Amp raise up to 0,55Amp and then the devie Start by 1,4Amp


      Thanks for your support
      Last edited by Richi_el; 11-30-2021, 04:07 AM.

      Comment

      Related Topics

      Collapse

      • Syseng
        Lenovo P14s Gen 5 SVP unlock
        by Syseng
        This sums up discussion related to Lenovo P14s Gen5 in this thread. Credits go to Sbaro and especially Maxpower3. The locked dump is attached.

        The device is based on NM-F871 motherboard with Nuvoton NPCK397 series controller. The motherboard also contains three BIOS chips: two different Winbond chips for main BIOS and external EC flash, and also a Gigadevice chip which purpose I do not know. The password information is contained directly in controller and thus can be manipulated by reprogramming it, so reprogramming BIOS chips is technically not required, however you may wish to make...
        06-22-2025, 07:44 AM
      • SMDFlea
        Common SPI bios chip programming Questions and Answers
        by SMDFlea
        Common SPI bios chip programming Questions and Answers
        ----------------------------------------------------------

        Q: I have a bios request,i can`t post my backup as i can`t read from the chip.

        A: If you can`t read from it how do you expect to write to it ?.

        Q: Why is my bios chip unreadable ?.

        A: The programmer is faulty or has a worn or broken zif socket.

        The USB cable is frayed,connector pins worn or some other physical damage.

        Not enough amperage or voltage to power the programmer properly.

        Bad...
        09-02-2021, 04:40 PM
      • hikesync
        XMCQH128A​ Programming issue
        by hikesync
        Sup guys i've been having a trouble with XMCQH128A chips, this is the only model that always fails to programming. All the others models and brands like Winbond, cFeon, etc. All works fine. But i just cant do it with XMC chips, is there some specific program that i must use? (i am using NeoProgrammer)


        ...
        06-26-2025, 11:22 AM
      • araxnido
        Programming KBC IT8987VG ASUS TUF FX506L RT809F+PEB
        by araxnido
        Dear friends, I want to share my experience repairing an ASUS TUF FX506L gaming laptop motherboard: DABKXDMB8E0_F_BKXD. Boardview and schematic are available, as well as the BIOS and ITE ROM.

        When the customer brought in this laptop, it was initially dead; it showed no signs of booting for any reason. After hours of measurements, checking each stage, MOSFET, and seeing if there was a short circuit in any capacitor, I discovered a strange 0.7V leakage voltage on the 3V_S5 rail, particularly on the PL9 coil, with the board not powered on. There were 3V_LDO and 5V_LDO voltages, which...
        06-10-2025, 09:26 PM
      • bk304
        Dell Precision 3560 BIOS programming
        by bk304
        I am working on a Dell precision 3560 with a locked BIOS. I used AsProgrammer software with the CH341A v1.7 set at 3.3V. AsProgrammer is the only software that works with the CH341A that lists the W25R256JV. Reading the 25R256JV with this setup returned garbage results. I switched to my T48 programmer and it identified the chip as a 25Q256JV and appeared to read the chip perfectly.

        I need to reprogram the chip but I am not sure if the programming the 25R256JV with the 25Q256JV setting will work. I don't want to risk bricking the computer.

        Anybody have any experience or...
        02-16-2025, 09:21 AM
      • Loading...
      • No more items.
      Working...