CH341a and logic level converter

[megaraider]

Re: CH341a and logic level converter

(...) and the mentioned 1.8V SPI converter, but the software can't detect the chip, I programmed it twice anyway but the tablet still doesn't turn on, this was with the BAT+ desoldered, by the way.
(...) what puzzles me is that everywhere I looked nobody removed the battery or desoldered the chip from the motherboard and they were all successful wih those sh*tty clips.

Hope you're *not* insisting on using the 1.8V SPI converter you've posted images earlier!
As suggested along the way you should use this one:

2nd. Forget the clip and that tricky voltage level converter;
3rd. Use the CH341A programmer and a suitable voltage level converter, e.g. this 1.8V SPI Flash adapter around €4;

later found in this tutorial they're using the some converter, btw

Found this tutorial in pdf:
Recovering-a-Bricked-Chuwi-Hi12-caused-by-Corrupt-Bios.pdf

;
Therefore, if you're not comfortable removing the BIOS chip you should, imo:
Forget what puzzles you... get the tools you need and follow the tutorial
The tutorial mentioned above is quite complete and has detailed images.
[BAT+ has to be desoldered, and the BIOS chip has to be correctly detected in CH341 programmer before anything good can be accomplished].
.

[wall]

Re: CH341a and logic level converter

I'm using the recommended 1.8V adapter, I didn't notice I had to put the clip on the latch's side, opposite of the ch341. It detects now, thank you.

[wall]

Re: CH341a and logic level converter

BIG THANK YOU TO ALL WHO HELPED ME!
My tablet lives again.
Thank you thank you thank you.

[stj]

Re: CH341a and logic level converter

you see it helps to follow the instructions

[megaraider]

Re: CH341a and logic level converter

You're welcome. Happy to know you succeed

[heart_taker]

Re: CH341a and logic level converter

I'm using the recommended 1.8V adapter, I didn't notice I had to put the clip on the latch's side, opposite of the ch341. It detects now, thank you.

can you please help me i have the same issue. what adapter you are talking about. and latch side?

[stj]

Re: CH341a and logic level converter

the socket on the programmer is 16pin,
8pins at one end for eeproms, 8pins at the other end for flashchips.

[fredas58]

Re: CH341a and logic level converter

I have a very similar situation, I can open a separate thread but I thought it's too much similar.
Let me explain:

• I need to flash W25Q64FW on the motherboard of a chromebook
• I have already unplugged the battery
• I plan to use a TXB0108 to bring voltage from 3.3V to 1.8V
• I will also use a CH341A, black version

Ideally I would do this on Linux, but I am already planning to use Windows to reduce complexity (as that is anyway the most used way and I should encounter less issues).

Can you foresee any problem with the setup and/or the TXB0108? I really do not wish to order another part as I have a few days left to do this. I have read mixed reviews about the TXB0108 in a SPI scenario.

[stj]

Re: CH341a and logic level converter

this may work in Linux.
it supports the programmer.
https://www.flashrom.org/Flashrom

[fredas58]

Re: CH341a and logic level converter

this may work in Linux.
it supports the programmer.
https://www.flashrom.org/Flashrom

Nice! thanks, will try