2 Sep
2012
2 Sep
'12
11:42 p.m.
On 09/02/2012 10:37 PM, blstuart at bellsouth.net wrote:
Does anyone know if Motorola ever made 6809s that
could function
either as 6809 or 6809E depending on some external signal, or perhaps
depending on how they were bonded out?
I don't think so. They used different mask sets for the 6809 and
6809E. Possibly only the metal mask differed, but I haven't verified that.
For the 6809, I've seen masks P6F, T5A, CW3, and C65P.
For the 6809E, I've seen masks T6R and EN6, but I'm pretty sure there is
one earlier and one later one.
The one oddball I've seen was marked MC6809ELDS, with an MB2 mask and
8417 date code. I've never found out what the deal is with the "LDS"
suffix, or the oddball mask code.
But after numerous double checks, the chips definitely
say
MC68B09E/00TA6/HEQB0014. [...] Did I
end up getting a couple of chips that were mismarked?
Seems likely that it's mismarked. Is the part in a plastic DIP?
Normally all "E" parts would have a second letter for the package, so
it's possible that this was a non-E part where the mismarking error was
to use "E" as a package code instead of "P" or "L".
On the other hand, I haven't seen a TA6 mask code before. Based on the
date codes, it could be that the TA6 mask set for the "E" part might
correspond to the C65P mask set for the non-"E".
Is there a way to make them behave as 6809Es?
Doubtful.
Eric