| ??? 03/19/10 12:06 Read: times |
#174304 - 480Mbps is quite fast Responding to: ???'s previous message |
Joe Gold said:
If the USB data rate is 480MHz , how on hell will a 50MHz 80c51 process data at this bandwidth?
Joe It took 2-3 years after the introduction of the 480Mbit/s high-speed before the controllers and drivers had improved enough that a PC could handle that speed comfortably. Very few microcontrollers - all architectures and manufacturers included - are able to handle 480Mbps. It takes a reasonably large buffer memory and a fast memory interface with DMA support to handle the data. And the microcontroller would either have to be fast enough to do some form of work with the data, or have another similarly fast interface to tunnel the data. In the end, quite few microcontroller applications have any use for these transfer rates. |
| Topic | Author | Date |
| USB 2.0 Compliant Yet Only Full Speed 12MHz | 01/01/70 00:00 | |
| it is a common misconception... | 01/01/70 00:00 | |
| Full vs High speed | 01/01/70 00:00 | |
| USB 2.0 High Speed | 01/01/70 00:00 | |
| 480Mbps is quite fast | 01/01/70 00:00 | |
| Applications | 01/01/70 00:00 | |
| 480Mbps on the way in | 01/01/70 00:00 | |
| Maybe, maybe not. | 01/01/70 00:00 | |
| Yes, things gets complicated at higher speeds | 01/01/70 00:00 | |
| you are fortunate | 01/01/70 00:00 | |
| Not lucky. Errata came much too late | 01/01/70 00:00 | |
| What do you expect to do with data? | 01/01/70 00:00 | |
| MCU with High Speed Port | 01/01/70 00:00 | |
| other way around | 01/01/70 00:00 | |
| Remember It is the Bus Sped | 01/01/70 00:00 | |
| Still fast compared to most microcontrollers | 01/01/70 00:00 | |
| high-speed USB with 48MHz Cypress 8051 core | 01/01/70 00:00 | |
| Marketing kidding | 01/01/70 00:00 | |
re: marketing | 01/01/70 00:00 | |
| browser problem? | 01/01/70 00:00 |