Sounds like time to raise a ticket on the microchip web site, or talk to yo=
ur local Microchip FAE.



> Right, so, re-reading the 10F322 ds in the light of the new information f=
rom
> AN1673, there seems to be a typo of sorts in the "high endurance flash"
> description table, pp 9 "TABLE 2-1" defines high endurance flash as being
> between 0F80h-00FFh for '320 and 1F80h-01FFh for '322, than would be 8
> words if my interpretation of the typo is right (is it?). pp 51 "TABLE 9-=
1"
> defines flash rows as being 16 words long.
>=20
> So the mcu has one possible row of high endurance flash at 0x1F8-0x1FF,
> length 8 words, but the row length is 16 ... I hope you can see how one c=
an
> easily treat some wrong area of flash as high endurance with predictable
> results, even if it will take QUITE a while for the predictable results t=
o
> manifest themselves.
>=20
> Based on the above, my current interpretation is, that there are 8 word
> addresses of high endurance flash at the end of the flash memory space on
> '320 and '322, which can be used as normal program flash (14 bits) for th=
e
> specified 10kwrites, or as 8 bit high endurance storage for data.
>=20
> In the latter case, the row length implies that the last 16 words of the
> '320 or '322 flash space be used for 8 bit high endurance data on write, =
which
> implies that the relevant ram write buffer has to be 16 words long, with
> actual data starting at word 8 to word 15, using LSByte only. This is a l=
ittle
> weird, but I can live with it.
>=20
> To (ds?)-mistify things even more, AN1673 pp 6 mentions that normal
> enhanced arch pics have 32 byte (not word!) flash rows, while "smaller on=
es
> have 16 byte (!!) flash rows". Now, a 16 _byte_ flash row would tie in ni=
cely
> with the 8 _words_ of _presumed_ high endurance flash on the '320 and
> '322.
>=20
> THEN again, if one presumes the initial typo in the high endurance flash
> TABLE 2-1 to be the other way around, i.e. h.e. flash from 1FF0 to 1FFF o=
n
> '322, i.e. as large as on the PIC16F1509, which is a qute bigger device, =
then
> things would be really nice, with plenty of h.e. flash in nice 16 _word_ =
rows,
> with low _byte_ usable.


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