PIC32MX270混淆：是否有Flash等待指令读取？

Hi，简单的答案是：不，在这些设备中读Flash程序存储器时总是有0个等待状态。所以没有设置任何东西，也没有什么可以改变的。这些设备可以从RAM中读取与FRAM相同的速度指令。当你在RAM中读或写数据，或者读或写SFR寄存器时，将不会延迟HARWAR体系结构的好处，除非，如果你正在从Flash中读取大量的数据，比如图形图像像素。Y在其他地方，在下一个指令中RAM或SFR，所以从RAM读取指令无论如何都要等待。



      以下为原文

    Hi,
The simple answer is: no.
There are always 0 wait states when reading instructions from flash program memory in these devices.
So there is nothing to set, and nothing that can be changed.
These devices may read instructions from flash with the same speed as from RAM.
 
Running instructions from ram will break the benefit of the Harward architecture,
that fetching instructions from Flash, will not be delayed when reading or writing Data in RAM,
or reading or writing SFR registers.
 
Except maybe, if you are reading lots of data from flash, like graphic image pixels.
But even then, those pixels probably are going somewhere else, to RAM or SFR in the next instruction,
so then instruction read from ram will have to wait anyway.
 
Regards,
   Mysil

谢谢，这也适用于低功率版本的设备与更高的时钟出来吗？数据表中显示了一个缓存机制，但在设备电气规格下也没有列出Flash备忘录的等待状态。



      以下为原文

    Thanks, 
 
Does this also apply to the Low Power versions of the devices coming out with a higher clock? A cache mechanism is shown in the datasheet but again no wait states for flash memmory are listed under devices electrical specs,