SPI NAND Flash not Detected about snander

[Droid-MAX]

Too expensive thanks.

[McMCCRU]

Hi! You have some kind of hardware problem, not a software one. Either you have very long wires to the flash memory, or you are trying to read the flash memory directly from the board without removing it...

[McMCCRU]

I programmed this particular chip TC58CVG2S0H quite recently, with this software version, there were no problems.

[skxo]

Thanks Mc, what do you recommend to use on top of the ch341a as adapter? Do you use a little adapter where you resolder the memory or do you use a ZIF socket?

[McMCCRU]

I use the adapter that came with the programmer.

[skxo]

from my side, I unsolder the chip and put it on a ZIF socket. this socket is then put in the ch341a and I launch the SANDer but still got this 0xff, then the 0x98.
What is your device revision of WCH ? mine is 3.0.4

[McMCCRU]

My version 3.0.4
https://github.com/McMCCRU/SNANDer/blob/main/Programmer_photos/photo3.jpg

[McMCCRU]

You set jumper in 3.3V?

[skxo]

one jumper is present on pin 1 and 2 of the top yellow pin header. Do you use different settings?

[McMCCRU]

I don’t have a power switch, I asked you because I don’t know which programmer you are using.

[Droid-MAX]

Jumper switch is used for switch mode on ch341a programmer. Short pin 1 and pin 2 is flash programmer mode, short pin 2 and pin 3 is usb2ttl mode.

[skxo]

Hi Mc,

I did few checks.
I built a dumper with a Ftdi ft2232h and the id of the Nand is the good one. If I increase the speed of the clock, I obtain 0xFF. So I guess it is timing issues...

Do you know how to reduce the clock speed of the ch341a?
in the spi_nand_flash.c, spi_nand_set_clock_speed() is empty.

Regards

[McMCCRU]

Hi! I have never encountered such a problem, check it with another computer or programmer. Try my advice I gave in this post - #7 (comment)

[ANTI443]

McMCCRU:

Hello I am encountering the same exact issue that you have exactly the same in every way.

I am using a ch341a programmer that I know works, I am using a wson8 adapter as shown

what OS are you using?

skxo

Do you have some sort of document you can share and help elaborate on what you did and how you did it to work thank you!

[Droid-MAX]

@ANTI443 Where can I buy that adapter？

[ANTI443]

@Droid-MAX ebay and amazon $20 USD wson8 adapter.

https://www.ebay.com/itm/QFN8-WSON8-MLP8-MLF8-DFN8-TO-DIP8-socket-adapter-for-both-6-5MM-and-8-6MM-ICs-/324544230146?_trksid=p2349624.m46890.l49286

@McMCCRU
@skxo

Could you all check my comment.

Thanks!

[Droid-MAX]

In addition, what is the service life of your adapter?

[ANTI443]

@Droid-MAX I'm not sure it's a ch341a eeprom reader what is being used here.

[ANTI443]

Same issue @McMCCRU I am also making sure I have 3.3v on the ch341a reader.

TC58CVG2S0H

[McMCCRU]

#11 (comment)

[F5BJR]

found error etron spi not in the list