DS61143G which covers PIC32MX3XX and 4XX has a "Product Identification
System" page, which doesn't tell you much more that you've already seen
here.  "MX" is described as "architecture", presumably to mean something
like "MIPS core".  I would guess the "X" will get more detailed as they
license or develop new products in the future.  I'd guess the "3XX" part
will behave the same way, in the manner of the more familiar Microchip
"PIC"s.  It's not like we could really figure out how the numbering in thos=
e
families work, either.
--=20
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