PICKIT3：MPLABX IDE和IPE下的不同行为

问候语。我们最近使用PIC12F1571（MSOP-8包）生产了20个定制板。我在星期五用IDE（V3.35）使用了我的PICtiT3程序，其中12个都是正确的。今天，我用IPE（V3.35）使用了相同的PACTIT3编程其他8个，并且它们都出现了，按照IPE正确地编程。然而，2的电路板表现得好像MCU没有被编程。我试图用IPE来验证它们，验证失败了。我读取一个MCU的内容，并将其验证到原始的HEX文件-它匹配。我关闭IPE并打开IDE，它将无法连接到PICTIT3。我拔掉了皮卡3，重新连接起来。我用IDE对两个板进行编程，这两个工作都很好。硬件细节：编程板从板对面的MCU大约5mm。CLK和DAT线被用作模拟输入-我有2K电阻隔离运算放大器和MCU引脚的输出。MCLR引脚仅用于VPP和I AMLN使用内部上拉电阻。VDD绕过引脚与100NF和10uF陶瓷帽。VDD是5V。在这两种情况下，我使用PICTIT3为目标板。在VDD上从其他设备汲取的总电流大约为1Ma。有没有其他人看到这种行为？最困扰我的部分是IPE没有产生任何错误，即使它好像没有正确地编程MCU。谢谢，比尔。



      以下为原文

    Greetings.  We recently produced 20 custom boards using the PIC12F1571 (MSOP-8 package).  I programmed 12 of them on Friday using my PICKIT3 with the IDE (v3.35) and all of them worked correctly.  Today, I programmed the other 8 using with the same PICKIT3 using the IPE (v3.35) and all of them "appeared" to program correctly according to the IPE.  However, 2 of the boards behaved as if the MCU had not been programmed.  I tried to verify them using the IPE and the verification failed.  I read back the contents of one of the MCUs and verified it to the original hex file - it matched.  I closed the IPE and opened the IDE - it wouldn't connect to the PICKIT3.  I unplugged the PICKIT3 and reconnected it.  I programmed both boards using the IDE and both work fine.

Hardware details: the programming pads are about 5mm from the MCU on the opposite side of the board.  The CLK and DAT lines are used as analog inputs - I have 2K resistor isolating the outputs of an op-amp and the MCU pins.  The MCLR pin is used only for VPP and I am only using the internal pull-up resistor.  VDD is bypassed at the pin with 100nF and 10uF ceramic caps.  VDD is 5V.  I used the PICKIT3 to target the board when programming in both cases.  Total current draw from other devices on VDD is about 1mA.

Has any one else seen this behavior?  The part that troubles me the most is that the IPE didn't generate any errors even though it doesn't seem like it correctly programmed the MCU.

Thanks in advance,
Bill