How to use cheap CH341A programmer for read/write 95xxx Eeproms
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  1. #1
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    Default How to use cheap CH341A programmer for read/write 95xxx Eeproms

    I hope this will help someone, like it did for me. I must say, this is not my solution, I am just sharing it with you. I used this programmer with success to read and write to 95128 EEPROM.

    1. Buy a cheap CH341A eerpom from Ebay or Aliexpress. This programmer supports two types of eeprom, 24xxx (I2C) and 25xxx(ISP) series, so on the ZIF socket there are labels which indicate where to insert which type of EEPROM. For reading and writing to those eeproms, 3.3 V power is supplied from the programmer its self. But to write and read to automotive 95xxx series eeproms we need to supply 5VDC. Luckly on the programmer there is 5VDC pin which we will be use to get this power from.

    2. Modification 1: 95xxx eeproms are read/write by inserting them to the 25xxx labeled socket and thats where we need to cut the 3.3V trace on the backside on the PCB. Now solder a short piece of wire from 5V pin to pin number one on the socket. Now we have 5V power for our 95xxx eeproms.

    3. Modification 2: Add a 1000uF 16V elco capacitor to the USB power line, positive side of capacitor goes to the plus pole, and negative side of capacitor goes to the minus pole of USB power line. By adding this capacitor we stabilize 5V power, and are getting better readings of eeprom content.

    4. Install CH341A Programmer Software v1.31 and CH 341A drivers. Run the programm, now there are no 95xxx type of eeproms available in the software, select 25xxx, with same capacity as your chip. And thats it.

    I also use AsProgrammer software, it has support for CH341A hardware and 95xxx series eeproms.
    Attached Images Attached Images

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    Default How-to-use-cheap-CH341A-programmer

    Hi dado CA.
    Could you explain or check pin connections as there seems to be something wrong ! pin 1 of the data sheet for the 95xxx series is the opposite to the one you are showing


    Ignore this post

    The bottom connections are marked different than what they actually are on top.
    Last edited by sunxemx; 27th September, 2018 at 02:37 PM. Reason: mistake found

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    Hello, thank you for the information!

    Will this work to read the dump of the 95640 on the Blaupunkt CD30 ? I need it to decrypt the security code of my car. Thanks again!

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    Quote Originally Posted by skna View Post
    Hello, thank you for the information!

    Will this work to read the dump of the 95640 on the Blaupunkt CD30 ? I need it to decrypt the security code of my car. Thanks again!
    It will work for cd30, checked

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    This work with SOP8 Clip? Its recommended to desolder the eeprom chip? Or can we use in SRS Airbag without problem?

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    Good work i will try soon with rcd 300 blaupunkt

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    i need help here please should i desolder the 95640 chip or use test clip which in no.1 on chip and how should i know it what is the type of chip to use in ch341a software or asprogrammer Please help me

    update (Thanks it is working good with desoldering the chip)
    Last edited by omandour; 10th February, 2019 at 06:55 AM.

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    You should always desolder the eeprom chip to get reading without errors. I read the chip twice and save the dumps, then use HxD Software to compare the two dumps with its Analyze->Compare feature. And get some SOIC8 adapter. soic adapter.jpg

    Use As Programmer as it supports larger set of chips.

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    Hello, thank you for the information!
    Tell me my brother is possible to work with radio rcd 310 + 510 blaupunkt

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    working Good

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    thank you very much for sharing this. Will it work to read eeprom 93C66 from CID, with this modified programmer?

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    I use mine on a ST 95160 and never had a problem,great deal and good piece of equipment

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    Hello, i have eeprom 25080 and he is not detected in software , this model of eeprom is mounted on ecu lucas dcu3r but and eeprom 95080 is mounted on lucas dcu3r 25080/95080 need 5v? On usb programer ch341 stock is not detected.

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    which modification is the best option to read and write all 24,25,95 chips without errors?
    Adding a 1000uF 16V elco capacitor to the USB power line,
    or cutting 3.3v trace and solder short wire ?
    Last edited by armo; 4th October, 2019 at 01:57 PM.

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    If you were a smart and enterprising young man you could add switches

    To switch back and forth between the 5 v and 3.3v............

    Then it will do all
    The thanks button is HERE looks like this --->>> THANKS

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