Re: I need some help about nand flash.

Re: I need some help about nand flash.

[Steve Tsai]

I do not know your condition very well, but I think all the pins of the
flash you connect correctly. What's the WE and RE timimg diagram in your
board? In my board, I use CS to control WE and RE and I have not enought
WE pull-high hold time, when two continue writeb functions are called in
nand_command. I delay few nsec between writeb funciotns to solve my
problem. You can try this and if you can provide more information about
your system, maybe I can give you more sugestion.

Steve Tsai

>Hi:
>    I have read your post http://lists.infradead.org/pipermail/linux-mtd/2002-June/005286.html.
>    
>    Now I encounter the same problem as you. 
>    The flash I used is TC58128AFTI manufacted by Toshiba.
>    I can read Device ID,read Status and Reset it successfully,but I can't read data.
>    I captured the timing diagram with a logic analyzer .It meets all requirements stated in 
>the chip's datasheet. 
>    When I perform a read operation(the command code is 0x00),the RY/BY# keeps high when the third address has been latched and that the data I read is always 0x00.
>   
>   
>   Any advice will be apreciated.
>
>   Thank you very much.
>
>
>
>  
>