No hardware related electronics thread?

Discussion in 'Chit Chat' started by value_f0rge, Nov 27, 2019.

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  1. value_f0rge

    value_f0rge MDL Novice

    Feb 1, 2018
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    Hello everyone, I know there is the BIOS Mods forum and such, but I was wondering if there was a circuit thread. I have some questions about some Flash devices I was wondering if someone could help me with.
     
  2. Michaela Joy

    Michaela Joy MDL Crazy Lady

    Jul 26, 2012
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    Welcome to MDL!

    :welcome2:

    Which flash device are you interested in?
     
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  3. value_f0rge

    value_f0rge MDL Novice

    Feb 1, 2018
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    Hello! It's a Serial Flash Memory I have the data sheet. I can't post links yet. But the IC is a 25D40/20. Should be the first thing that populates on a search engine. It's made by Zetta Semiconductors

    I'd like to pull the firmware off of it. I know that's not an easy task. It's not in the Flash ROM supported list or any of the ICS for like the TL866PLus programmer. I'd like to learn how I can build a custom circuit/ use like an STM32 to interface with it and analyze the logic. The end goal would be to write a program that I can interface with the device. Thanks!
     
  4. Michaela Joy

    Michaela Joy MDL Crazy Lady

    Jul 26, 2012
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    Take a look here:
    https://www.elnec.com/en/device/Zetta/ZD25D40 [TSSOP8]/

    Maybe you can search ebay for a "knockoff" programmer that supports it.

    Worse case, you can use an Arduino with a serial port and send the data to a terminal program on Windows.

    The interface is SPI, and the device is 3.3V
     
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  5. value_f0rge

    value_f0rge MDL Novice

    Feb 1, 2018
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    @Michaela Joy

    Thanks for the resources, has a lot of interesting stuff on there. I can't find any clones though :/ I didn't think it would work with an arduino as the chip runs at 80-85Mhz and the Arduino only runs at 16Mhz
     
  6. Michaela Joy

    Michaela Joy MDL Crazy Lady

    Jul 26, 2012
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