Hi RY-san,
I read this thread carefully.
> a) GPMC clock cycle is specified as 50MHz on TRM.
> But, actually the clock cycle is 100MHz.(GPMCFCLKDIVIDER=0h)
> b) Actually, TIMEPARAGRANULARITY=1h
> But, its register field value is not specified on TRM.
> c) Instead, if you specifies the XIP Timing Parameters using clock cycles,
> tCSEXTRADELAY must be "1/4". Because the one clock cycle is specified
> 20nsec and actually the delay is 5nsec ("1/4").
As the result, I think c) is important. And a) b) are a little confusing.
So, I propose the TRM modification request as follows.
TRM Table 26-8, XIP Timings Parameters
[Current] tCSEXTRADELAY CS Extra Delay 1/2
[Modified] tCSEXTRADELAY CS Extra Delay 1/4
Could you agree this TRM modification request for your customer ?
Regards,
Ohshita