16 Apr
2005
16 Apr
'05
1:20 p.m.
On 4/16/05, Scott Stevens <chenmel at earthlink.net> wrote:
You might want to check out the 6402. I have a bunch
of them from some
syncronous modems I scrapped a few decades back. It has the distinction
of being from the same family as the 6100 'PDP-8 on a chip' micro, and
is fairly bare-bones. It has several simple registers, but much of the
config is done with hardware by enabling pins and what-not.
I have used them in the context of the FDC6120. ISTR they share a
mode with the RCA 1854 that was common on 1802s. I think _all_ the
setup is by grounding/pullingup pins. Handy for designs that need to
have serial up and running right away, before there's time to
initialize in software.
-ethan