24Hz to 60Hz PLL?
in [Design]
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From: Jan Panteltje on 6 Mar 2010 08:10 On a sunny day (Sat, 6 Mar 2010 02:14:21 -0800 (PST)) it happened Greegor <greegor47(a)gmail.com> wrote in <7c4ed12c-c24b-41e0-9888-c3d6143c2a25(a)g11g2000yqe.googlegroups.com>: >On Feb 13, 10:20�am, Vladimir Vassilevsky <nos...(a)nowhere.com> wrote: >> MooseFET wrote: >> > On Feb 12, 3:01 pm, Vladimir Vassilevsky <nos...(a)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 >
From: linnix on 6 Mar 2010 10:42
On Mar 6, 2:14 am, Greegor <greego...(a)gmail.com> wrote: > On Feb 13, 10:20 am, Vladimir Vassilevsky <nos...(a)nowhere.com> wrote: > > > > > MooseFET wrote: > > > On Feb 12, 3:01 pm, Vladimir Vassilevsky <nos...(a)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? 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. |