On Fri, 18 Feb 2000, george wrote:
> Well it certainly has something like a microprocessor. It must have an ALU
> (Arithmetic Logic Unit), memory, LCD driver and timing and control circuitry
> at a minimum. A custom IC would probably have been more economical that
> off-the-shelf for this application. But such a chip would definitely fall
> under the term 'microprocessor'.
>
> george
So you are saying that it has RAM, ROM, a clock, and an I/O controller? As
far as I know all microprocessors require at least this much to function.
You would also need a D/A converter to convert the analog signal from the
light sensors into digital form.
I'm pretty sure that the OM circuits are integrating analog amplifiers
with variable feedback loops. But I admit to never having viewed the
schematic.
Be Seeing You.
Dirk Wright
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