6 Sep
2010
6 Sep
'10
11:34 a.m.
On 2010 Sep 6, at 5:56 AM, allison wrote:
On 09/05/2010 10:06 PM, Brent Hilpert wrote:
> I just ran across an NEC D75008 microcontroller in a small photo
> copier ca. 1990. According to a search it is a 4-bit microcontroller.
>
> Idle curiousity, but does anybody know if this has any inheritance
> from or relation to better-known microcontrollers such as the
> TMS1000, that is, is it NEC's version of something better known?, or
> is it NEC's own architecture?
No, it is NEC unique. For 4 bitters that is usually
the case. it
is a much more expanded
design closer to modern PICs with many variants having LCD driver on
board.
OK, a family I had never run across before. Found a datasheet for (by
appearance) a descendant (D75112/6). Looks like they took a cue from
the 8080 family - the register set is nearly identical but in 4 bits,
with register pairs BC, DE, HL to make 8-bit registers.