请问Brown out重置只是将PIC24放在保持中，还是在PIC上进行重置？

是什么让你相信PIC24有一个“保持”特性？



      以下为原文

    What has led you to believe the PIC24 has a "hold" feature?

我在下面的论坛看到了这篇文章。但听起来像是做了重置。所以它听起来不是很有用。听起来，你必须防止棕色的电源从一开始就发生。因为我们的PIC上的软件现在启动到电源故障状态，所以用户必须按“开始”继续。如果每次出现停电时都重置，那么用户在使用时就会看到随机电源重启，这也不好。如果进入芯片的电源不足以可靠地工作，则处理器处于复位状态。本质上，如果电源不足将导致奇怪的行为，处理器将保持复位，而不是试图继续运行。一旦电压超过了熄灭阈值，它就应该恢复。



      以下为原文

    I saw on these forums this text below.  But sounds like it does do a reset.  So it doesn't sound very useful then. Sounds like you have to prevent the brown out of power from occuring in the first place.  Because the software we have on the PIC right now boots up into a power failure state, so the user has to press start to continue.  If it reset everytime a brownout occurred, then the user would just see random power restarts while using it and that would be no good either.
 
"A brown out is a loss of power (or enough of a loss of power so that the PIC won't function reliably). 
All that Brown Out Reset does is automatically put the processor in reset if the power coming into the chip isn't sufficient to work reliably.  Essentially, if lack of power is going to cause funky behavior, the processor will hold in reset rather than try and keep running.  It should then resume once the voltage has gone above the brownout threshold"
 
 

它是否会因为PIC上没有启用上电计时器而导致，从而可能正在从SPI线路发送虚假数据？我目前没有上电定时器或BOR。



      以下为原文

    Could it instead be caused by not having the power up timer enabled on the PIC so that it is maybe sending bogus data out the SPI lines?  I don't have power up timer or BOR enabled currently.
 

你还需要包括“重置”的粗体。你可以“执行”的唯一方法是停止CPU时钟。



      以下为原文

    You need to include "in reset" in bold as well.  The only way you can "hold" execution is to stop the CPU clock.

或者睡觉。



      以下为原文

   
Or a sleep.

它停止了时钟。



      以下为原文

   
 
Which stops the clock.

停止时钟，公平地说，停止时钟的事物。



      以下为原文

   
 
Which stops the clock.


Fair enough, Things that stop the clock.

这是一个绕过这个话题的HTTP://www. McCHIP.COM/FUMUS/M9577.7.ASPXAND在那里被充分讨论。



      以下为原文

    This is a detour from this topic http://www.microchip.com/forums/m957237.aspx
and is fully discussed there.
 

PIC24当然有AMODED处理器停止，但时钟仍在运行。在DOCS中它被称为“空闲”。



      以下为原文

    PIC24 most certainly has a mode where processor stops, but the clock is still running. It is called "idle" in the docs.

当PIC从重置中出来时（例如，在brown out之后），您可以检查一个寄存器（在我的头顶上不记得它的名字），它告诉重置的原因。



      以下为原文

    When the PIC comes out of reset (after a brown out for example) you can examine a register (don't remember its name on the top of my head) that tells the cause of the reset.
 
/Ruben

我不认为有人说了相反的话吗？



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I don't think anyone has said anything to the contrary?

我不认为有人说了相反的话吗？也许有人这样做了：



      以下为原文

   
 
I don't think anyone has said anything to the contrary?



Perhaps someone did:
 

空闲模式是为什么我明确地说“停止CPU时钟”，而不是“停止时钟”。



      以下为原文

    Idle mode is why I specifically said "stops the CPU clock", not "stops the clock".

如果BOR已禁用Brown，CPU状态是否有效？我想这是没有保证的。



      以下为原文

    Is The CPU state valid if there is a brown out with the BOR disabled?
I would think it was not guaranteed.

根据设备的不同，数据表可以告诉您在各种重置条件下重置了哪些寄存器（以及重置了哪些值）。但是，我假设BOR可能与POR相同，这意味着您不能信任任何事情，并且应该按照需要的方式初始化所有寄存器。



      以下为原文

    Depending on the device the data sheet can tell you what registers are reset (and to what values) in the various reset conditions.
However I would assume that a BOR is probably the same as a POR which means that you can't trust anything and should initialise everything the way you need it.
Susan

如果发生在上电/下电时，固件重置没有关系。如果在正常运行时发生，那么就有一些严重的电源设计问题。



      以下为原文

    If it's happening during power-up/down, it doesn't matter if your firmware resets.
If it's happening during normal operation, then you have some serious power supply design issues!