SPI NAND Flash not Detected

skxo commented 3 years ago

Hello,

I use your SNANDer program to dump a TC58CVG2S0H, thanks for proposing such a tool based on ch341a.

During identification, I get this weird error.

$ ./SNANDer -i

SNANDer - Serial Nor/nAND/Eeprom programmeR v.1.7 by McMCC <mcmcc@mail.ru>

Found programmer device: WinChipHead (WCH) - CH341A
Device revision is 3.0.4
spi_nand_probe: mfr_id = 0xff, dev_id = 0x98
SPI NAND Flash Not Detected!
spi device id: ff 98 ed 51 98 (98ed5198)
SPI NOR Flash Not Detected!

in the datasheet, I can read:

Byte     | Description.                      | Value
Byte 0 | Manufacture ID (KIOXIA) | 98h
Byte 1 | Device ID.                           | CDh

The 98h value is present. So the 0xff are dummy bits and 0x98 is the Mfr_id. But the device ID 0xCD is wrong (0xED instead of 0xCD)

Fyi, I tried with a MXIC and I still get 0xff as manufacturer id.

The workaround is to modify the #define value of MANUFACTURER_ID and the DEVICE_ID to the values above (but it does not correspond to the real ID). Or to adjust the parsing of the read id command

Any suggestion from your side, according to your previous experiments on SPI Nand?

Regards sk

McMCCRU commented 3 years ago

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 commented 3 years ago

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

skxo commented 3 years ago

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 commented 3 years ago

I use the adapter that came with the programmer. Screenshot_20210409_124910

skxo commented 3 years ago

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 commented 3 years ago

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

McMCCRU commented 3 years ago

You set jumper in 3.3V?

skxo commented 3 years ago

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

McMCCRU commented 3 years ago

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

Droid-MAX commented 3 years ago

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 commented 3 years ago

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 commented 3 years ago

Hi! I have never encountered such a problem, check it with another computer or programmer. Try my advice I gave in this post - https://github.com/McMCCRU/SNANDer/issues/7#issuecomment-801021792