There seems to be an error in MPLAB v7.52 regarding the configuration
bits. Yesterday for another project, I programmed 16F886-devices
without problem, but today in a new project, programming 16F628A is
weird.

I'm using ICD2, compile my assembler-code without problems, select
ICD2 from the programmer menu, then "connect". The result:

Connecting to MPLAB ICD 2
...Connected
Setting Vdd source to MPLAB ICD 2
Target Device PIC16F628A found, revision = Rev 0x8
...Reading ICD Product ID
Running ICD Self Test
...Passed

The device is found. I program the device, and get this result:

Programming Target...
...Validating configuration fields
...Erasing Part
...Programming Program Memory (0x0 - 0x8F)
Verifying...
...Program Memory
...Verify Succeeded
Programming Configuration Bits
.. Config Memory
Verifying configuration memory...
...Verify Failed (and stopped)
ICD0161: Verify failed (MemType = Config, Address = 0x2007, Expected
Val = 0x3F38, Val Read = 0x3FFF)
ICD0275: Programming failed.

Then, I try programmer->connect (as I did above), and get this:

Connecting to MPLAB ICD 2
...Connected
Setting Vdd source to MPLAB ICD 2
ICDWarn0020: Invalid target device id (expected=0x83, read=0x1FF)
...Reading ICD Product ID
Running ICD Self Test
...Passed

I thought the chip in question was bad, so I tried another 16F628A.
Same behaviour, ICD2 find the chip, goes error when programming and
cannot find the chip afterwards. It looks like it's been code
protected in some way, despite I have _CP_OFF & _CP_DATA_OFF in my
__CONFIG.

Are the chips really code protected (and wasted), or what is happening here?

I tried again with a new chip, same result. I have eight 16F628A
total, but after seven chips I gave up, leaving me only one left. I
don't dare trying it as well, because this problem looks like a real
money waster. I've contacted Microchip for help but no response yet.


-- 
- Rikard - http://bos.hack.org/cv/
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