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

**AudiS4** · 11th October, 2020, 10:08 PM

Originally Posted by blackground

Because the pin 1 is wrong. If you change the connector, you will get device connected.

What do you mean pin 1 is wrong??which connector?? on programmer?? Do you have a picture. When connecting red led on programmer goes out as soon as i put the clip on the chip. I am using 2 jumpers. I have power on both 3.3 and 5v pins both show 5v.

**blackground** · 12th October, 2020, 09:55 PM

take a picture of the front to see the jumpers

**oba** · 13th October, 2020, 01:25 AM

thanks , good job!

**AudiS4** · 19th October, 2020, 12:49 AM

Originally Posted by blackground

take a picture of the front to see the jumpers

i

Ok I got another ch341a with the same pcb as in this thread. I can get it to connect however I am trying to read a 93S56 it reads everything as FF. Reading 93S56 as a M93C56 it reads but entire memory is blank FF any ideas? Note this is being done in circuit no modification to new programmer on 2 jumpers.

**volorucinski** · 19th October, 2020, 06:16 AM

93x and 95x are different type. One is spi, the other one is i2c

**br556hre** · 20th October, 2020, 07:59 PM

93x can also be read with CH341x as 24x i2c chip but you need to connect pins differently to ch341. Look at datasheets for 24xx and 93xx pinout and you will understand how to connect.

I remember 1 and 8 are the same, other are differently connected and one pin is connected hi or low depending if you have 8 or 16 bit chip. I don't have access to my pc at this time, but you can goolge for it, im sure you will find solution fast.

**odisseys** · 22nd October, 2020, 02:49 PM

Just use "AsProgrammer 1.4.1"software.There have 95xx support.I had no issues up to date. https://github.com/nofeletru/UsbAsp-...mmer_1.4.1.zip

**br556hre** · 26th October, 2020, 01:09 PM

This guy have 93xx chip that is microwire and require different pin connections.
Look at this video:
https://youtu.be/hPKckby54uA

**AudiS4** · 9th November, 2020, 03:28 PM

Originally Posted by odisseys

Just use "AsProgrammer 1.4.1"software.There have 95xx support.I had no issues up to date. https://github.com/nofeletru/UsbAsp-...mmer_1.4.1.zip

Are you using a modified reader/programmer with 2 jumpers?? I ordered another one and its turns out there is 2 o 3 different versions of pcb for this thing i was able to get the same one you guys are using but had no luck reading eeprom in circuit.

**fuzz1** · 9th December, 2020, 06:43 AM

Originally Posted by br556hre

yes adrianux, 24c32 can be read, no problem. Just take care to connect pin 1 correctly!

Hi

Can you explain what you mean by take care of pin 1?

**fuzz1** · 9th December, 2020, 06:44 AM

Originally Posted by AudiS4

Are you using a modified reader/programmer with 2 jumpers?? I ordered another one and its turns out there is 2 o 3 different versions of pcb for this thing i was able to get the same one you guys are using but had no luck reading eeprom in circuit.

Have you shorted the crystal before reading the eeprom in circuit?

**fuzz1** · 9th December, 2020, 07:04 AM

Originally Posted by ferrarikid

Just wanted to say I really appreciate who made this guide I too was able to read some eeproms with this method. For those doing the mod I know this is self explanatory for some but for me wasn’t strait forward, this is how you do the capacitor mod. Also I added a file you can replace in AsProgrammer to get more types of chipsets in the search Attachment 699646

Attachment 699644

I guess you wrote the attachement chipset.zip. Would you mind sharing how you added the extra chipsets?

**fuzz1** · 26th December, 2020, 06:09 AM

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 from this new software most welcome