My project doesn't have the funds to get our own VID yet either. So instead we are picking one out of thin air. Since our particular device requires a EEPROM anyway we decided that if it ever becomes popular enough to worry about, we can issue a firmware update that re-writes our VID to the official one.
Just don't use 0x8086 since we all know who has that one...;)
Cypress makes the EZ-USB AN2131 series micros. They are 8051 cores with an USB SIE on the die. The low-level USB packetizing is handled by the SIE. All you do is program the 8051 to setup your endpoints and you're off and running.
They are about $10 in qty 100. If you purchase a USBSIMM (use google) you get a full development board for about $80. The coolest thing about the EZ-USB is that when it first connects to the bus, you use a driver to download the 8051 hex file to it. So you are essentially programming it everytime you connect it.
The AN2131 is supported in Linux (quite well too.)
Actually the Infiniium is an oscilloscope family from Agilent Technologies. It was originally named Infinium before Agilent split from HP but the spelling had to change because of a trademark dispute over the word "Infinium." In fact, I suspect if these guys ever come out with a product, their company name will have to change.
The link you provided is just a partnership of Agilent's.
For the AC ripple measurements it would have been better to put the scope in infinite persistance. Measuring the output over time doesn't really matter. Digital scopes spend the majority of their time sitting around, not measuring signals. So we are missing tons and tons acquistions between each acq.
If he put the scope in infinite persistance we would have seen the ripple voltages grow over time. It would have provided a chance to see an overall (or even average) difference between idle and load.
One of my customers has a lab in an unlikely part of the building. On the door it says "Accounts Receivable." When you walk in, its one of the most validation labs I've ever seen. Instead of a funny name like "Everyone on slashdot complains of not sleeping because they think it makes them sound cool", name it another corporate department.
REAL DVDs aren't burned. They are pressed. Production CDs and DVDs have a layer of alumninum that get their Pits and Lands pressed by a metal plate. They are not burned.
Uh, it won't get hot if you choke the speaker wires themselves. These people are not suggesting putting a choke on the AC line. That wouldn't much good.
Forgive me if I sound a bit naive but wouldn't parallel be faster than serial?
On paper, parellel can be made to be faster than serial. However, in the practical world it is very difficult to make a high bandwidth parallel bus. It is even more difficult to run that bus any considerable amount of length. By using a serial bus with embedded clock you only need 2 signal wires. If those signal wires are a differential pair (perferrable Low-Voltage) then you can run them a considerable length at an extremely fast rate. If you have a parallel bus, you don't have the option of embedding the clock. If you are running with out an embedded clock you must send a clock syhncronous with the data. Now you have to deal with skew issues between each individual channel as well as all channels relative to the clock. Not to mention other aspects such as crosstalk between the channels. If all you have to worry about is two signals (which if are differential can be considered 1) then many of those issues ago away.
There's a lot of physical behind why its extremely difficult to run long lengths of parallel lines. Yes a parallel bus is faster, but it is almost impossible to implement a reliable parellel bus running at 1.5Gb/s, through cables, and with connectors. Take a look at a bus like hypertransport. It can be up to 16bit wide and run 1.6Gb/s. However, it is a point to point protocol, is run over a control impendance, and is run over very short distances.
I don't think these were fair tests. I would have liked to seen some oscilloscope measurements of what the voltages/waveforms looked like under full load. Being that we expect our DC power supply to delivery a DC voltage, even a novice can tell a "bad" output from a "good" output. Take two power supplies for example. A 300W and a 500W supply. (For numbers sake, let's say they only deliver 5V to the load. No +12v, -12v, etc). If I max load the 300W supply and it is delivering a clean 5volts, that's a great supply. But if the 500W supply is spiking or has considerable noise with a 300W load, who cares if it runs up to 500W?
To me that's almost more important than if the supply shuts itself down or not. Which, by the way, is still a nice FEATURE.
Re:How can you compare Hammer w/ Itanium?
on
Going Itanium 2?
·
· Score: 2
I think your information is mistaken. The Hammer is not based on anyone's existing x86 core. It is a true 64-bit processor with compatibility for IA32/x86. Almost all of the design starts for the processor right now are for high end workstation/servers. The processor's core has the ability to scale from mobiles to desktops to high-end workstations to servers. So no, DRnetman is not comparing apples and oranges.
According to the article, Cinea found that they are losing $3 billion a year. If you take the reported losses from piracy of movies, games, and music does that even add up to a credible dollar amount? It'd be funny if they added up to more than what the average economy produces.
They really weren't Evil. They simply produced a product for stupid people. Remember. There are NO stupid products. There are only the stupid people who buy them.
"oh, here's another interesting factoid to mull.. after they slice your eye and flip it open to zap it with the laser, it will NEVER HEAL. "
I've been considering the surgery for a while because my eyesight is pretty bad. Until now...
My favorite activity is wakeboarding. In order to wakeboard safely I have to wear contact lenses. I need to be able to see what's going on, and glasses don't work. This little tidbit makes me completely change my mind. I have taken some serious face plants that were so bad, I half expected to be blind when I came back up. (Some people call these eye-openers because you hit the water so fast you don't have time to close your eyes.)
I wondered how the cutting of your eye would weaken it overall. Knowing that it never heals tell me I'd never be able to wakeboard again. The danger of taking a faceplant would be too great...
The law-based/automatic fraud protection and $50 liability that applies to Credit Cards DOES NOT apply to Debit Cards. If you are using a Debit Card, you are fully responsible for charges until you report your debit card is stolen.
Its obvious the solution to your problem is a custom web-based front end to an overly complicated Oracle database. Ideally the schema should make very little since with hundreds of unused columns--many of which are misspellings. (Thanks for the DROP COLUMN command, oracle). In order to ensure maximum benefit, this system should be designed by a couple of guys who are COMPLETELY drunk off their rocker and refuse to document anything. The system will exhibit wild uptimes given that the programmers are drunk during 75-80% of the system's overall development. A solution such as this will provide with you enourmous perceived flexibility, tons of headaches, and job security.
Oh wait, you already have that in place.;)
Re:Pentium V will be even faster !
on
Pentium 4 2.8GHz
·
· Score: 2
What? How on earth could you have even seen a "Pentium V"? First of all, the first silicon release of this P4 won't happen until the end of the year. The "P5" is still in its design phase. As far as AMD doing something on the front side bus, that idea is moot. AMD is moving very fast to their star-configured Hypertransport FSB. Once they've moved into that direction you won't be able to compare the P4 FSB to the K8 FSB.
Yes size of solder joints will matter. The impedance mismatch of the solder joint can be enough to generate reflections that will destory the signal.
Yes skew if a very big deal for differential signals of any speed. Sure maybe adding an inch on a USB cable won't hurt, but more than 3 inches will.
Impedance mismatches will be the largest problem of them all.
These are all issues if you do not know that they can cause problems. If you've never soldered something, don't know what a differential signal is, or do not know anything about tranmission lines, these are all big issues. From the sound of the question, my guess is the person asking doesn't know (and maybe not understand) these issues. If you do, then no, they may not be a big problem.
You can't just go hacking into a USB cable and make it longer. Probably the #1 reason is that USB uses a differential signal. That means that however you extend the cable you have to do it exactly the same on both D+ and D-. If you don't, part of your diff signal gets skewed and becomes corrupted at the receiver. Secondly you have to maintain an imepedance match. Anytime you introduce an impedance mismatch you generate reflections. The wire used in a USB cable has a certain about of reactiance (X). The X of a twisted wire pair is completely different.
In order to do what you want, you really need to build a fairly preceision amplifier/receiver setup. The difficulty is the fact that you are dealing with differential signals. Each "side" of the diff signal must be treated the same way. It is almost impossible for you to make the exact same size solder joints, exact same size wires, and have the exact same impedances throughout. Its especially important on long runs because of the highly immentant signal attenuation.
Slashdot Mirror
... read "Tarzan" and think, "wow that's a great idea!" =)
My project doesn't have the funds to get our own VID yet either. So instead we are picking one out of thin air. Since our particular device requires a EEPROM anyway we decided that if it ever becomes popular enough to worry about, we can issue a firmware update that re-writes our VID to the official one.
;)
Just don't use 0x8086 since we all know who has that one...
Cypress makes the EZ-USB AN2131 series micros. They are 8051 cores with an USB SIE on the die. The low-level USB packetizing is handled by the SIE. All you do is program the 8051 to setup your endpoints and you're off and running.
They are about $10 in qty 100. If you purchase a USBSIMM (use google) you get a full development board for about $80. The coolest thing about the EZ-USB is that when it first connects to the bus, you use a driver to download the 8051 hex file to it. So you are essentially programming it everytime you connect it.
The AN2131 is supported in Linux (quite well too.)
Actually the Infiniium is an oscilloscope family from Agilent Technologies. It was originally named Infinium before Agilent split from HP but the spelling had to change because of a trademark dispute over the word "Infinium." In fact, I suspect if these guys ever come out with a product, their company name will have to change.
The link you provided is just a partnership of Agilent's.
For the AC ripple measurements it would have been better to put the scope in infinite persistance. Measuring the output over time doesn't really matter. Digital scopes spend the majority of their time sitting around, not measuring signals. So we are missing tons and tons acquistions between each acq.
If he put the scope in infinite persistance we would have seen the ripple voltages grow over time. It would have provided a chance to see an overall (or even average) difference between idle and load.
Search term: stained glass pc case
Results 1 - 10 of about 16,500. Search took 0.16 seconds.
Oddly enough this story has already been caught by google.
Thanks! I was looking for a cheap FPGA board exactly like these!
First, its "Windows" not "Windoze."
If you're going to correct someone for mispelling something, then you should take the time to make sure you do the same.
(Yes, I am aware of the fact you think its "leet" to call it Windoze instead of Windows. However, mispelling it is stupid.)
It's no different than sharing the connection between an upstairs computer and a downstairs computer.
Most ISPs do not allow the connection sharing within a home either.
One of my customers has a lab in an unlikely part of the building. On the door it says "Accounts Receivable." When you walk in, its one of the most validation labs I've ever seen. Instead of a funny name like "Everyone on slashdot complains of not sleeping because they think it makes them sound cool", name it another corporate department.
REAL DVDs aren't burned. They are pressed. Production CDs and DVDs have a layer of alumninum that get their Pits and Lands pressed by a metal plate. They are not burned.
Uh, it won't get hot if you choke the speaker wires themselves. These people are not suggesting putting a choke on the AC line. That wouldn't much good.
Is that so you can do eShopping at an eMall during an eVacation, all while taking a very real dump on a very real toliet?
Forgive me if I sound a bit naive but wouldn't parallel be faster than serial?
On paper, parellel can be made to be faster than serial. However, in the practical world it is very difficult to make a high bandwidth parallel bus. It is even more difficult to run that bus any considerable amount of length. By using a serial bus with embedded clock you only need 2 signal wires. If those signal wires are a differential pair (perferrable Low-Voltage) then you can run them a considerable length at an extremely fast rate. If you have a parallel bus, you don't have the option of embedding the clock. If you are running with out an embedded clock you must send a clock syhncronous with the data. Now you have to deal with skew issues between each individual channel as well as all channels relative to the clock. Not to mention other aspects such as crosstalk between the channels. If all you have to worry about is two signals (which if are differential can be considered 1) then many of those issues ago away.
There's a lot of physical behind why its extremely difficult to run long lengths of parallel lines. Yes a parallel bus is faster, but it is almost impossible to implement a reliable parellel bus running at 1.5Gb/s, through cables, and with connectors. Take a look at a bus like hypertransport. It can be up to 16bit wide and run 1.6Gb/s. However, it is a point to point protocol, is run over a control impendance, and is run over very short distances.
I hope that helps.
By noise, I mean noise on the supply line. Ripples, Spikes, dropouts, etc. Not, "how loud is the fan."
I don't think these were fair tests. I would have liked to seen some oscilloscope measurements of what the voltages/waveforms looked like under full load. Being that we expect our DC power supply to delivery a DC voltage, even a novice can tell a "bad" output from a "good" output. Take two power supplies for example. A 300W and a 500W supply. (For numbers sake, let's say they only deliver 5V to the load. No +12v, -12v, etc). If I max load the 300W supply and it is delivering a clean 5volts, that's a great supply. But if the 500W supply is spiking or has considerable noise with a 300W load, who cares if it runs up to 500W?
To me that's almost more important than if the supply shuts itself down or not. Which, by the way, is still a nice FEATURE.
I think your information is mistaken. The Hammer is not based on anyone's existing x86 core. It is a true 64-bit processor with compatibility for IA32/x86. Almost all of the design starts for the processor right now are for high end workstation/servers. The processor's core has the ability to scale from mobiles to desktops to high-end workstations to servers. So no, DRnetman is not comparing apples and oranges.
According to the article, Cinea found that they are losing $3 billion a year. If you take the reported losses from piracy of movies, games, and music does that even add up to a credible dollar amount? It'd be funny if they added up to more than what the average economy produces.
They really weren't Evil. They simply produced a product for stupid people. Remember. There are NO stupid products. There are only the stupid people who buy them.
"oh, here's another interesting factoid to mull.. after they slice your eye and flip it open to zap it with the laser, it will NEVER HEAL. "
I've been considering the surgery for a while because my eyesight is pretty bad. Until now...
My favorite activity is wakeboarding. In order to wakeboard safely I have to wear contact lenses. I need to be able to see what's going on, and glasses don't work. This little tidbit makes me completely change my mind. I have taken some serious face plants that were so bad, I half expected to be blind when I came back up. (Some people call these eye-openers because you hit the water so fast you don't have time to close your eyes.)
I wondered how the cutting of your eye would weaken it overall. Knowing that it never heals tell me I'd never be able to wakeboard again. The danger of taking a faceplant would be too great...
Was this a Credit Card or a Debit Card?
The law-based/automatic fraud protection and $50 liability that applies to Credit Cards DOES NOT apply to Debit Cards. If you are using a Debit Card, you are fully responsible for charges until you report your debit card is stolen.
Its obvious the solution to your problem is a custom web-based front end to an overly complicated Oracle database. Ideally the schema should make very little since with hundreds of unused columns--many of which are misspellings. (Thanks for the DROP COLUMN command, oracle). In order to ensure maximum benefit, this system should be designed by a couple of guys who are COMPLETELY drunk off their rocker and refuse to document anything. The system will exhibit wild uptimes given that the programmers are drunk during 75-80% of the system's overall development. A solution such as this will provide with you enourmous perceived flexibility, tons of headaches, and job security.
;)
Oh wait, you already have that in place.
What? How on earth could you have even seen a "Pentium V"? First of all, the first silicon release of this P4 won't happen until the end of the year. The "P5" is still in its design phase. As far as AMD doing something on the front side bus, that idea is moot. AMD is moving very fast to their star-configured Hypertransport FSB. Once they've moved into that direction you won't be able to compare the P4 FSB to the K8 FSB.
Yes size of solder joints will matter. The impedance mismatch of the solder joint can be enough to generate reflections that will destory the signal.
Yes skew if a very big deal for differential signals of any speed. Sure maybe adding an inch on a USB cable won't hurt, but more than 3 inches will.
Impedance mismatches will be the largest problem of them all.
These are all issues if you do not know that they can cause problems. If you've never soldered something, don't know what a differential signal is, or do not know anything about tranmission lines, these are all big issues. From the sound of the question, my guess is the person asking doesn't know (and maybe not understand) these issues. If you do, then no, they may not be a big problem.
You can't just go hacking into a USB cable and make it longer. Probably the #1 reason is that USB uses a differential signal. That means that however you extend the cable you have to do it exactly the same on both D+ and D-. If you don't, part of your diff signal gets skewed and becomes corrupted at the receiver. Secondly you have to maintain an imepedance match. Anytime you introduce an impedance mismatch you generate reflections. The wire used in a USB cable has a certain about of reactiance (X). The X of a twisted wire pair is completely different.
In order to do what you want, you really need to build a fairly preceision amplifier/receiver setup. The difficulty is the fact that you are dealing with differential signals. Each "side" of the diff signal must be treated the same way. It is almost impossible for you to make the exact same size solder joints, exact same size wires, and have the exact same impedances throughout. Its especially important on long runs because of the highly immentant signal attenuation.