On a sunny day (Sat, 6 Mar 2010 02:14:21 -0800 (PST)) it happened Greegor
<g...@gmail.com> wrote in
<7...@g11g2000yqe.googlegroups.com>:

>On Feb 13, 10:20 am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>> MooseFET wrote:
>> > On Feb 12, 3:01 pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>>
>> >>Chris wrote:
>>
>> >>>I need to make aPLLthat slaves to a24Hzsquare wave.  The output of
>> >>>the loop would be a60Hzsquare wave.  Any CMOS level chips that would
>> >>>be good for this?  I understand that I would need to divide by a
>> >>>decimal value of 2.5 for the loop.
>>
>> >>Use a PIC.
>>
>> > No, the 8051 is the right processor for this.
>>
>> Personally I despise PICs. However PIC became a generic word for any
>> small microcontroller. Once a customer asked me if I work with PIC
>> controllers made by AVR company.
>
>AVR?
>Is that one of the Z80 compatible chips the Chinese
>use to run MP/3 players, cameras etc?
>I'd like to see 8 bit CP/M running on one and
>starting with an MP/3 player with flash
>memory, USB and an LCD for cheap would
>make it more interesting.
>
>See the CP/M usenet group.

You could then run my CP/M clone on it too, if it supports Z80 instructions:
 http://panteltje.com/panteltje/z80/system14/index.html

But I do not think AVR knows about LDIR?
LD (IX-12), value?
hehe

>> Vladimir Vassilevsky
>> DSP and Mixed Signal Design Consultanthttp://www.abvolt.com
>

On Mar 6, 2:14=A0am, Greegor <greego...@gmail.com> wrote:
> On Feb 13, 10:20=A0am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>
>
>
> > MooseFET wrote:
> > > On Feb 12, 3:01 pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>
> > >>Chris wrote:
>
> > >>>I need to make aPLLthat slaves to a24Hzsquare wave. =A0The output of
> > >>>the loop would be a60Hzsquare wave. =A0Any CMOS level chips that wou=
ld
> > >>>be good for this? =A0I understand that I would need to divide by a
> > >>>decimal value of 2.5 for the loop.
>
> > >>Use a PIC.
>
> > > No, the 8051 is the right processor for this.
>
> > Personally I despise PICs. However PIC became a generic word for any
> > small microcontroller. Once a customer asked me if I work with PIC
> > controllers made by AVR company.
>
> AVR?

Yes, they are made by Norwegian Chinese and headquartered in San Jose
Chinatown.  Chinese is a genetic term for hard working technical
people.

> Is that one of the Z80 compatible chips the Chinese
> use to run MP/3 players, cameras etc?

Good enough to control and power the ASICs.

> I'd like to see 8 bit CP/M running on one and
> starting with an MP/3 player with flash
> memory, USB and an LCD for cheap would
> make it more interesting.

Can CP/M runs in 4 to 8K RAM?  Oh, wait.  AVR can't run from RAM.

On Mar 6, 8:42=A0am, linnix <m...@linnix.info-for.us> wrote:
> On Mar 6, 2:14=A0am, Greegor <greego...@gmail.com> wrote:
>
>
>
> > On Feb 13, 10:20=A0am, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
>
> > > MooseFET wrote:
> > > > On Feb 12, 3:01 pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote=
:
>
> > > >>Chris wrote:
>
> > > >>>I need to make aPLLthat slaves to a24Hzsquare wave. =A0The output =
of
> > > >>>the loop would be a60Hzsquare wave. =A0Any CMOS level chips that w=
ould
> > > >>>be good for this? =A0I understand that I would need to divide by a
> > > >>>decimal value of 2.5 for the loop.
>
> > > >>Use a PIC.
>
> > > > No, the 8051 is the right processor for this.
>
> > > Personally I despise PICs. However PIC became a generic word for any
> > > small microcontroller. Once a customer asked me if I work with PIC
> > > controllers made by AVR company.
>
> > AVR?
>
> Yes, they are made by Norwegian Chinese and headquartered in San Jose
> Chinatown. =A0Chinese is a genetic term for hard working technical
> people.
>
> > Is that one of the Z80 compatible chips the Chinese
> > use to run MP/3 players, cameras etc?
>
> Good enough to control and power the ASICs.
>
> > I'd like to see 8 bit CP/M running on one and
> > starting with an MP/3 player with flash
> > memory, USB and an LCD for cheap would
> > make it more interesting.
>
> Can CP/M runs in 4 to 8K RAM? =A0Oh, wait. =A0AVR can't run from RAM.


My parts came today.  I tried my design, and it locks solid on the
right frequency finally.  The new loop filter is awesome.  Kudos to
Helmut for his damped loop filter.  Also, my NE555 debounce circuit
fixed the frequency error problem.  Yaaaah!

@Jan I will be trying your design next and see how it compares to mine
in lock time.

Thanks All
Chris Maness