Some news
I received the Nand adapter !
First problem was to find the way to disable the internal controller to not have conflict with my own nand control signals. I naively thought that after power up the control signal from the controller are high impedance. They are not...
I spent a lot of time to find a magic pad to disable the controller, use lower voltage,etc... but nothing!
Because the adapter also have the MMC/SD mode, I tried it and seen I was not able to detect the chip on the computer, but it works with my 80$ standard BGA adapter. I investigated with my oscilloscope and found there are no decoupling capacitors for VCC and VCCq as close as possible to the chip. I added some and was able to detect the chip on the computer in MMC mode (but always bad data of course).
At this moment I discovered the controller releases the Nand control signals after initialisation with MMC protocol !
I connected my nand reader, but nothing, no answer to my read ID command
I spent a lot of time to understand because with my logic analyser connected on the outputs of my home made nand reader all signals was perfects.
I decided to open the Nand adapter to put the logic analyser as close as possible to the chip, and discovered some signals was missing!!
In the Nand adapter kit there were some female to female wires (like arduino wires), I used them to connect my board to the Nand adapter, and some of them was bad, no continuity between the 2 sides!!
I replaced all of them by security by home made wires...
And I was able to read the nand device ID,yes!!
After I tried to read the unique ID data (2x16 bytes), which is stored in Flash (the device ID is not).
And it worked, and because the 2nd 16 bytes block is the XOR of the first one, I know the reading is good
After I tried to read my first 8832 bytes data page, but for now it doesn't work. The Nand doesn't answer my command,for now I don't understand why
Next chapter tomorrow