question: Why the nand_wait() wait for 20ms for nand program.

[Matthieu CASTET]

Huang Shijie a écrit :
> Hi all:
> Why the nand_wait() wait for 20ms for nand program. could we
> expand this time to 40ms? I have a nand chip : Micron MT29F64G08CBABAWP.
> The chip's BUSY/READY pin may needs more then 20ms to become ready,
> though its
> datasheet tells me the tPROG's max value is 2.5ms.
> 
Don't you have an hardware problem (missing pullup/down on ready busy pin) ?

If the datasheet say the max value is 2.5 ms , how it can be more than 20 ms.


Matthieu