I have a product where I want to switch from using the 16F627 to the
16F627A.
I want to make this change so I can use the ICD2 instead of PSPlus for ICSP.
Well, when I try to ICSP the circuit with the 627A, I get the following
message:

ICDWarn0033: MPLAB ICD 2 does not support programming this device if both
the internal oscillator and internal MCLR are selected.  You may continue
programming, but you are encouraged to cancel, reconfigure your device,
and try again.

Well, sure enough, if I try to program with MPLAB's Config Bits set
to MCLRE OFF, I can't program the device - the program already
in it starts running when Vdd is applied.  If I try to program the
device with MCLRE ON, it programs OK but then my product doesn't work
since I use the MCLR pin as I/O.

I just need a sanity check - am I not going to be able to program the
16F627A with the ICD2 since I am using the MCLR pin for I/O and
I'm using the INTOSC?  I'm asking cause I can't believe it and can't
stand the thought of doing any more firmware upgrades using the
PSPlus.


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