How to use cheap CH341A programmer for read/write 95xxx Eeproms

**fuzz1** · 7th January, 2021, 03:54 PM

I have tried to read 95c86 with the programmer. Can't find the if it says. Ended with smoke coming from the if. Tried with both 1 jumper n 2 jumpers. Used as programmer

**fuzz1** · 2nd February, 2021, 04:17 PM

Originally Posted by fuzz1

Here is a link to download a newer asprogrammer

More chips can be read
https://drive.google.com/file/d/18JJ...KUzAEgCJo/view

Your views for this new software most welcome

Please report if you have tried and been successful with the software

**pjakub** · 5th February, 2021, 05:48 AM

Tankyou! Worked for me reading the ST M95640 of the airbag module TRW without desoldering the eeprom!

**fuzz1** · 6th February, 2021, 01:07 PM

Hello
Please share how you did it. Would be interesting to know. Thanks

**winux19** · 7th February, 2021, 02:41 PM

thank you nice working

**fuzz1** · 7th February, 2021, 07:39 PM

Just a little frustrated. I shared the software asked to share how they got it working. And I get reply it works

**pjakub** · 8th February, 2021, 05:41 PM

In case it helps someone else, here I describe how I did to read / write the memory 95640 of the TRW airbag control unit: https://www.digital-kaos.co.uk/forum...ut-desoldering

**benaschwin** · 11th February, 2021, 03:49 PM

Originally Posted by dadoCA

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.

Thanks for this Info, can I also use a 6.3 V 1000uF capacitor instead of the 1000uF 16V elco capacitor?

**nzjohn** · 7th March, 2021, 05:41 AM

I used the CH341 to flash multiple S93C66 and S93A66 chips, with no additions or modifications to the programmer. If anyone wants the pin connection set up let me know.

**fuzz1** · 7th March, 2021, 06:45 AM

Originally Posted by nzjohn

I used the CH341 to flash multiple S93C66 and S93A66 chips, with no additions or modifications to the programmer. If anyone wants the pin connection set up let me know.

Hi
Of course we would like to here about it. Share it if possible.

**nzjohn** · 7th March, 2021, 09:33 AM

To flash 93xxx series eeproms with a CH341, buy some female to male jumper wires. Connections are named on the reverse of your CH341 at the base of the pins. You have 5V, 3.3V, GND, MIOS, MOSI, CS, and CLK. Using jumper wires of 8 colors for ease of use, connect the female ends to the CH341 pins while the other male end runs to your clip or board with the eeprom attached . Eeprom pin 1 connects to CS, Eeprom 2 connects to CLK, Eeprom 3 to MOSI, Eeprom 4 to MIOS, 5 to GND, 6 to 3.3V, and lastly join the wires from Eeprom 7 and 8 together and connect these to your CH341 5V pin. It's best to solder the eeprom to a board but a clip is almost as effective.
If you can use color coded wires it's easier to check you are connecting to the correct places.
I'll post clearer pics if anyone has problems. Ch341 can be left exactly as it was delivered. No soldering or additions are required. Leave the yellow jumper exactly on the two pins [as it arrived] on the CH341.
Remember to check your connections and this will work as I've outlined.
Good luck
Any issues..
Recheck your connections!
Good luck and all the best.
.pins.jpg 6.jpg
,

**benaschwin** · 9th March, 2021, 09:04 PM

But this is the 95 series and in the automotive industrie they use 5.5 Volts

**Flekous** · 14th April, 2021, 08:30 AM

Hi to all,
I just tried to read M95320 with no modification..
Just with two jumpers, eeprom desoldered and it works fine..

Asprogrammer 2.1.0.13

Thanks for usefull thread

**fuzz1** · 14th April, 2021, 07:03 PM

Originally Posted by Flekous

Hi to all,
I just tried to read M95320 with no modification..
Just with two jumpers, eeprom desoldered and it works fine..

Asprogrammer 2.1.0.13

Thanks for usefull thread

Hello

Please share how you did it with the two jumpers

**Flekous** · 30th April, 2021, 07:37 AM

Hi,
I'm sorry I don't have any photo right now, but I have used same config as "AUDIS3" member does.. #34 post
Just add second jumper as shown on the picture, place Eeprom to 25xx, in Asprogrammer choose
95320 or whatever 95xxx eeprom You have and "Read" it..
After some HEX data modification, just click to "Write"..

I can add some photo when I reach to home, if needed..

Thanks