On 2010-08-06 18:04, Carl Denk wrote:
> Thanks, Olin, and others that have replied. Olin's link is quite
> informative, and indicates that ICD is more than just sticking a
> connector on a board and hooking up 5 wires. I will study in more detail
> after lunch.
>
> The reference to MCLR is, the resistor connected there is labeled as
> 470 ohm, and then tagged as "typical values".

I'd say a "typical MCLR" resistor is in the 4.7k - 10k range.

I commented in an earlier post on how the RW (WR ?) line is
connected/used. Any comment on that ?

It *could* be that the LCD (with a floating RW line) is
driving the data-lines when the PIC isn't actively pulling
it low (as under reset or when in programming mode).
--=20
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