The 6.250MHz crystals are in! Run your Propeller at 100MHz...
Bill Henning
Posts: 6,445
I have several thousand pieces in stock, and I can get more if needed 
Sapieha recommends using a 10uF capacitor near the Propeller power pins to help keep Vdd stable during unexpected bursts of high current usage - I used a 10uF electrolytic capacitor.
Pricing will be up on my web site later tonight.
Here's a shot of the crystal in one of my boards: (with a few baggies of crystals near it to show I have lots)
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
Sapieha recommends using a 10uF capacitor near the Propeller power pins to help keep Vdd stable during unexpected bursts of high current usage - I used a 10uF electrolytic capacitor.
Pricing will be up on my web site later tonight.
Here's a shot of the crystal in one of my boards: (with a few baggies of crystals near it to show I have lots)
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
1024 x 658 - 351K
Comments
Sapheia may like to comment further as he has the prop running much faster than 100MHz
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, SixBladeProp, website (Multiple propeller pcbs)
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index)
· Search the Propeller forums (via Google)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
If You have Wide power traces and only Propeler Chip on PCB it is not nessesary place this Cap so close.
As You said it is " to help keep Vdd stable during unexpected bursts of high current usage " from Propeller chip mostly but even from other chip's to dry power from Propeller.
Thus I recomend it near Propeller.
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Nothing is impossible, there are only different degrees of difficulty.
For every stupid question there is at least one intelligent answer.
Don't guess - ask instead.
If you don't ask you won't know.
If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
Sapieha
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
It is only DC characteristic on that Cap that is of interest (fast loading/discharge) that is of interest.
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Nothing is impossible, there are only different degrees of difficulty.
For every stupid question there is at least one intelligent answer.
Don't guess - ask instead.
If you don't ask you won't know.
If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
Sapieha
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
Any idea if this crystal would work as a plug in replacement on a Hydra?
Ross.
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Catalina - a FREE C compiler for the Propeller - see Catalina
I have not Hydra ... But in my opinion it will not be any problem.
Else You only ad one 10uF Cap near prop
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Nothing is impossible, there are only different degrees of difficulty.
For every stupid question there is at least one intelligent answer.
Don't guess - ask instead.
If you don't ask you won't know.
If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
Sapieha
I bought a 100 6.00mhz crystals a year or so ago for 96mhz.
Other than 4mhz are there any other advantages (video, etc)
to running at 100mhz instead?
Don't get me wrong. I'm looking forward to obtaining some
at the Expo, just wondering why you went this direction. [noparse]:)[/noparse]
OBC
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New to the Propeller?
Visit the: The Propeller Pages @ Warranty Void.
In Yours case Not much.
Only 4MHz with one COG extra speed !
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Nothing is impossible, there are only different degrees of difficulty.
For every stupid question there is at least one intelligent answer.
Don't guess - ask instead.
If you don't ask you won't know.
If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
Sapieha
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propmod_us and propmod_1x1 are now in stock. Only $30. PCB available for $5
Need to upload large images or movies for use in the forum. you can do so at uploader.propmodule.com for free.
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
The 4MHz will not make much difference (over 6MHz crystals), just 4.16% in clock speed and hub bandwidth.
The difference over 5MHz is quite significant, 25% more of everything (speed, hub bandwidth etc)
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
just your usual "overclock at your own risk" type thing?
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
Sapieha runs his props at 120MHz
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
Post Edited (Bill Henning) : 6/20/2009 4:17:23 AM GMT
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
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my 6.250MHz custom Crystals now available - run your Propeller at 100MHz!
Las - Large model assembler for the Propeller (alpha version released)
Largos - a feature full nano operating system for the Propeller
www.mikronauts.com - a new blog about microcontrollers
I tested one Dil40 on TriBlade and one FPQ on protoboard USB in 3 month with room temperature (In my case 25-30 degres Celsius).
Them run 120MHz (15MHz x PLL8) without any problem.
Ps. Without any radiator on chip's
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Nothing is impossible, there are only different degrees of difficulty.
For every stupid question there is at least one intelligent answer.
Don't guess - ask instead.
If you don't ask you won't know.
If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
Sapieha
Post Edited (Sapieha) : 6/20/2009 4:12:46 AM GMT
Use a Tantalum. They have much better characteristics and are used by professionals for a reason because they are more expensive.
I have used them (1uF tantalums spread sparsely over the pcb) in various micro based designs over the years and have sold 100,000's without a problem. Much better than having an intermittent problem [noparse]:D[/noparse]
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, SixBladeProp, website (Multiple propeller pcbs)
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index)
· Search the Propeller forums (via Google)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
>I believe they only tested for one minute.
>The data sheet does not say they failed after one minute,
>only that they were tested for one minute.
The converse being implied is that at the temperature above the line, at least one in the test sample must have failed during the one minute test. The test graph mentions an average on a sample of chips, but does not say how that was computed. Maybe the line is when half of the sample had failed the test during one minute, which would be a more serious consideration.
We have to remember that the test was performed "using code run on all eight cogs, multiple video generators, and counter modules", so that would mean a current consumption (from an ealier graph) of 100 mA, and a power of 0.33 watt. All I could find for thermal resistance for the LQFP44 package was a figure of 25 to 50 degC/W for thetaJA. That would mean an additional 8 to 16 degC. That is, if the test had been done in still air, but it was not. It was done in forced air, so the more appropriate figure would be thetaJC. But the point is that there would be an extra thermal consideration. On one hand, one might not be running the chip full tilt. On the other hand, one might not have the advantage of forced air.
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Tracy Allen
www.emesystems.com
It is one problem with curent consumption with Prop.
If You have bad decouplings Caps near Prop it increase dramaticaly
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Nothing is impossible, there are only different degrees of difficulty.
For every stupid question there is at least one intelligent answer.
Don't guess - ask instead.
If you don't ask you won't know.
If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
Sapieha
They only used a small number of chips that don't appear to have been randomly selected. All that proves to me is that if you take a Propeller chip and run it at an elevated temperature and over-clock it, the chances are that it will continue to operate for at least one minute. Big deal!
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
However, from a hobbyist point of view, go for it!
I've run Props at 96MHz (6MHz x 16 PLL) since I first designed my own PCB over 2 years ago....
I've not had any problems at all, not one!
I've done extensive testing at various clock speeds, with and without PLL.
The best I've had is 125MHz with an oscillator, I used extra caps by the Prop VDD as Sapieha reccomends and had no issues.
OK so it's not best practice, it's operating outside normal reccomended parameters and is a little bit risky, sound quite exciting to me!
Coley
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PropGFX - The home of the Hybrid Development System and PropGFX Lite
At 100 Mhz, what is the actual MIPS. I think the quoted 160 MIPS no longer applies.
humanoido
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PropGFX - The home of the Hybrid Development System and PropGFX Lite
Personally, I would not use 100MHz in a commercial application because I would not want any recourse on me for not following official specifications.
But for hobby applications, games, emulations, etc, I have no problem with using 100MHz, and I will be doing so
I will be using a 4.7uF or 10uF tantalum and a 100nF (0.1uF) ceramic across the power pins close to the xtal as per Sapeiha's findings. This is good practice anyway.
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Links to other interesting threads:
· Home of the MultiBladeProps: TriBladeProp, SixBladeProp, website (Multiple propeller pcbs)
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index)
· Search the Propeller forums (via Google)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm
I run 120Mhz in 3 month with no isues with programs else heat
·
·
Ps
1. Tested in My room temp that is betwen 25-30C
2. With 15MHz crystal and PLL8
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Nothing is impossible, there are only different degrees of difficulty.
For every stupid question there is at least one intelligent answer.
Don't guess - ask instead.
If you don't ask you won't know.
If your gonna construct something, make it·as simple as·possible yet as versatile as posible.
Sapieha
Post Edited (Sapieha) : 6/20/2009 11:02:09 AM GMT
Is the same crystal used, or is another one required?
Is there any posted code to follow?
or a list of instructions?
humanoido