| ??? 03/21/10 02:52 Read: times |
#174364 - high-speed USB with 48MHz Cypress 8051 core 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 See the logic diagram page 2 of the datasheet for one of the Cypress parts Michael K. pointed to. It has an 8051 core, but a lot of other stuff besides. The data can go through the external FIFO, not necessarily the 8051 data bus. - 8051 core 12/24/48 MHz - Serial Interface Engine (SIE; CY Smart USB 1.1/2.0 Engine) - 4 KB External FIFO - GPIF ("General programmable I/Fto ASIC/DSP or bus standards such as ATAPI, EPP, etc.") (PDF file, 1.9M) http://www.cypress.com/?docID=20533 "With EZ-USB FX2LP, the Cypress Smart SIE handles most of the USB 1.1 and 2.0 protocol in hardware, freeing the embedded microcontroller for application specific functions and decreasing development time to ensure USB compatibility." |
| 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 |