是否可以订购特定版本的硅

嗨，我一直在与PIC18F26K40硅修订版A4的样品。我已经订购了付费PIC18F26K40产品，我已经收到了硅修订版A3。我现在有一些问题。我通过使用勘误表解决了一些问题，但我想知道是否可以订购特定版本的硅，因为我仍然有一个问题，勘误表没有处理。从TMR0计数下来产生的中断永远不会被调用。也就是说，当定时器计数下降时，TMR0IF永远不会设置。我可以看到TMR0L倒计时，我看不到TMR0H倒计时，但是根据数据表TMR0H不能直接查看。也许这是我正在做的事情，但是它在A4修订版上工作，但不是A3。



      以下为原文

    Hi,

I have been working with a sample of PIC18F26K40 silicon revision A4.
I have ordered a paid PIC18F26K40 product and I have received silicon revision A3. I now have some issues. I have worked around some problems by using the errata, but I wonder if silicon of a specific revision can be ordered, because I still have an issue that the errata does not address. The interrupt generated from TMR0 count down is never called. That is to say, that TMR0IF is never set when the timer counts down. I can see TMR0L counting down, I cannot see TMR0H counting down, but according to the datasheet TMR0H is not directly viewable.

Perhaps it is something I am doing, but it works on revision A4, but not A3.