PIC18F47K40自行复位

我有一个包含PIC18F47 K40的电路，加上GPS模块、SD卡和LeBus。电路按预期工作，它闪动LED几次，指示电路开始允许GPS模块时间启动。读取来自GPS模块的数据（USAT）将选择的数据写入SD车。D（SPI），我决定我需要一个短暂的开关编程中断，所以我可以停止电路干净，而不是只是关掉电源。我不想要一张腐败的卡片。用MCC把开关切换到RA4，但是，每当我按下开关，电路就会重置，从一开始就开始！经过仔细检查电路和灵魂搜索，我交换了PIC18F47 K40并用一个新的芯片替换。现在一切都在意料之中，芯片中的新交换没有复位。我建立了一个更简单的测试电路，只有LeDBUS，开关，LED和违规PIC18F47 K40。该电路工作如预期，但流氓PIC18F47 K40仍然重置自己。所以，我又换了另一个新的PIC18F47 K40，电路再次运行，没有恼人的重置。因此，在结论中，我有一个流氓PIC18F47 K40，每当我按下RA4上的开关时，它就自动重置——它不应该像这样；两个PIC18F47 K440在同一个C中工作得很好。所以我在某种程度上破坏了PIC18F47 K40破解，即使UART和SPI如预期那样工作，还是有一些配置需要更改？亚历克斯



      以下为原文

    I have a circuit containing a PIC18F47K40 plus a GPS module, a SD Card  and a Ledbus.

The circuit works as expected which is

• flash a led a few times to indicate that the circuit is starting allowing the GPS module time to start.
• read the data from the GPS module (USART)
• write selected data to the SD Card (SPI)
  

I decided I needed a momentary switch  programmed as an interrupt so I could stop the circuit cleanly instead of just turning off the power. I didn't want a corrupt card. Rigged the switch up to RA4 using the MCC.

However, whenever I pressed the switch the circuit reset itself and starts from the beginning!

After much inspecting of the circuit and soul searching I swapped out the PIC18F47K40 and replaced with a new chip. Now everything works as expected and the new swapped in chip doesn't reset.

I built a much simpler test circuit with just the ledbus, the switch, a LED and the offending PIC18F47K40. The circuit works as expected, but the rogue  PIC18F47K40 still resets itself. So again I swapped in another new PIC18F47K40 and the circuit again behaves itself without the annoying resets.

So in conclusion -

• I have one rogue PIC18F47K40 that resets itself whenever I press the switch on RA4 - it shouldn't behave like this;
• two other PIC18F47K40s that work just fine in the same circuit.
  

So have I in some way broken the rogue PIC18F47K40 broken, even though USART and SPI work as expected, or is there some config setting that needs changing?

Alex