Using my CH341A.

[philbo_baggins]

Re: Using my CH341A.

I successfully read and wrote in circuit the 93c56 and 93A56 EEPROM's. I didn't have to power on the circuit, I just used the SOIC8 test clip with the interface
that I built!
I could not use the CH341a though, so I have no use for that interface... at least for now.

newguy90, I am working through a similar problem that you did, do you mind doing a quick writeup of what you did to get this to work? It sounds like you didn't use the CH341 usb programmer/software, but connected directly to the chip through a serial port? I wasn't sure where the drawing you redlined came from, or if that was the final version that you used. Thanks.

[R_J]

Re: Using my CH341A.

Check this site, it has some information: https://hw-server.com/serial-eeprom-programmer
or do a google search for "93c56 programmer"
Also see here http://www.lancos.com/prog.html for ponyprog

[stj]

Re: Using my CH341A.

if you dont want to build something,
another option is this!

i just recieved one yesterday - very capable for the price!
http://www.xgecu.com/EN/TL866_main.html
http://www.aliexpress.com/item/32992209964.html
(and it can work in Linux as well as windows)

[beekerc69]

Re: Using my CH341A.

can you share exactly how you got the 3.3v working?
what pins you tied together or what jumper settings you used?
Thanks

[stj]

Re: Using my CH341A.

3.3v on what adapter?

[digby1951]

Re: Using my CH341A.

can you share exactly how you got the 3.3v working?
what pins you tied together or what jumper settings you used?
Thanks

https://www.youtube.com/watch?v=Hwnz...nnel=AdamantIT

[remaker]

I recently had a similar problem and posted a photo of the Chinese jumpers to Chinese Stack Exhange
https://chinese.stackexchange.com/q/59967/43628

Basically, jumper, 1-2 means “programmer.” That activates the programming line (ACT#) on the chip. Jumpers 2–3 translate to “brush machine,” while “brush machine” idiomatically means “flash programmer,” what it's really doing is disconnecting the programming line and setting up the system to use the USB to RS-232 as pass-through at TTL level. It seems that all USB the serial converters are called, brush machines, or flash programmers, since that is the most common use of the converter these days.

This particular model does not let you adjust 3.3V and 5V output. It seems to work fine on 3.3V parts, but a lot of people are uncomfortable with the electronic design. There are a number of sites that talk about how to physically modify the device to get through 3.3V, but it worked fine for me on 3.3V parts.

[diamon]

I have ordered also this device from Ali, (this one: click) and after connecting it to the USB port on my laptop, the voltage on data pin mentioned in the YouTube posting from AdamantIT is not 5V but the 3.2V from the voltage regulator (no chip has been placed into to socket).

It seems they have fixed this 5V issue on the data pin. The main chip is running on the 3.2V and not on 5V.