未检测到设备

大家好，我有以下问题。我有一个DEV板，上面有一个18F97 J60，我用它做我的测试。最后的项目将使用18（L）F26K22。问题是，PIDIT 3没有检测到18（L）F26K22，并且扔错目标设备ID（0x0）是一个无效的设备ID。我用MPLAB 8，MPLAB X 3.51和3.60.2测试。这里是真正的Probe。M是。第一次测试是用18F26K22使用外部电压（3.3V从稳压器+100uF帽）=错误使用PACKIT程序@ 3.3V＝错误使用PACKIT程序@ 5V＝工作精细。董事会有3V3组件，我不想运行@ 5V。使用PACIT程序@ 3.75 V =工作精细，任何低于该投掷错误。怀疑它与F版本vs LF有什么关系。购买18LF26K22版本。使用外部电压（3.3V从调节器+100uF帽）=错误使用皮卡程序@ @ 3.3V＝错误设置项目到F版本（允许使用更高电压的电源）和使用3.75伏作品，任何低于（3.60包含）不工作和抛出设备0x0LF版本是应该不超过3.6V。这里有什么问题？同一程序员可以编程18F97 J60和18F14K50@ 3.25V，但不18F26K22，18LF26K22或18LF26K80。有什么想法吗？谢谢



      以下为原文

    Hi all,

I have the following problem.  I have a dev board with a 18f97j60 on it I used to make my tests.

Final project will using 18(l)f26k22

The problem is, that pickit 3 isn't detecting the 18(l)f26k22 and throw error Target Device ID (0x0) is an Invalid Device ID.
I tested using mplab 8, mplab x 3.51 and 3.60.

Here is what the real problem is.  First test was made with 18f26k22
Using external voltage (3.3v from regulator + 100uf cap) = Error
Using pickit to program @ 3.3v = Error
Using pickit to program @ 5v = working fine.  Board have 3v3 components that I don't want to run @ 5v.
Using pickit to program @ 3.75v = working fine, anything below that throw error.

Suspected it had something to do with the F version vs lf.  Purchased 18lf26k22 version.
Using external voltage (3.3v from regulator + 100uf cap) = Error
Using pickit to program @ 3.3v = Error
Setting project to F version (allowing to power using higher voltage) and using 3.75v works, anything below (3.60 included) not working and throw device 0x0

lf version is supposed to have no more than 3.6v applied to it.

What is the problem here?  Same programmer can program 18f97j60 and 18f14k50 @ 3.25v but not 18f26k22, 18lf26k22 or 18lf26k80.  Any ideas??

Thanks