Hi-
I just looked at the 628A schematic, figure 5-5 in
http://www.microchip.com/download/lit/pline/picmicro/families/16c62x/40300c.pdf
, page 31, and it shows a diode to Vss, but no diode to Vdd.
David

Jinx wrote:

>>Just butting in here so sorry if I'm saying anything previously
>>said...but surely MCLR would not have the internal diode to Vdd
>>like regular PIC pins do so that it can be raised to +13V for
>>programming?
>>
>>
>
>According to Figure 5-5 of DS40300B the F628 does. But the
>628 can have MCLR as RA5 and THV too. DS40300B is quite
>good in that it shows internal diodes, some manuals don't. I don't
>think the 452 manual shows anything much internal for MCLR. As
>its MCLR is also Vpp, I wonder if the suggested circuit is a "one
>size fits all" for PICs with and without diodes and multiple functions
>
>--
>http://www.piclist.com#nomail Going offline? Don't AutoReply us!
>email listserv@mitvma.mit.edu with SET PICList DIGEST in the body
>
>
>

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body