USB to SD bridge
US8745304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2010 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Sep 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/0042
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A USB-to-SDIO bridge (UTSB) to efficiently transmit SD/SDIO commands in USB packets. The UTSB may allow the majority of the device drivers for a given SD/SDIO device to remain intact, requiring changes only in the lowest hardware adaptation layer to put a USB wrapper around native SD commands. These commands may be sent over USB-to-SD card reader devices that may include various embodiments of a UTSB, where they may be unwrapped and transmitted to the SD port as if the port were native to the host controller. Additionally, the SD/SDIO commands may be packaged into groups of commands, or transactions, to optimize performance. The host driver may instruct the UTSB bridge device to repeatedly read data from the SDIO device until a communications FIFO on the device is empty (corresponding to a termination condition), and return the collected data to the host.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.