Method and system for transferring high-speed data within a portable device
View Patent ↗A system for high-speed data transfer within a portable device, such as, cell phone or a set-top box, which includes a memory medium and a processor. The system includes a first port for coupling to the processor, and a second port for coupling to the memory medium. Further, the system includes an embedded Universal Serial Bus (USB) host configured for receiving data transfer commands from the processor, and transferring data at high speed between a USB device on the processor and the memory medium. Moreover, a data path is provided between the embedded USB host and the first port.
1. A system for data transfer within a portable device, the portable device including a memory medium and a baseband processor, the system comprising:
a first port for coupling to the baseband processor;
a second port for coupling to the memory medium;
an embedded Universal Serial Bus (USB) host configured for:
receiving commands from the baseband processor to transfer data between the memory medium and the baseband processor; and
transferring data between a USB device on the baseband processor and the memory medium;
wherein the embedded USB Host includes an integrated PHY interface; and
a data path between the embedded USB host and the first port; and
at least one of an Inter-Integrated Circuit (I2C), Serial Peripheral Interface (SPI), or Server Message Block (SMB) slave interface to receive and forward the commands from the processor to the embedded USB host.
2. The system of claim 1 , wherein the data path is through a USB hub providing a USB connection according to at least the USB 2.0 specification between the baseband processor and the USB host.
3. The system of claim 1 , wherein the data path is through a physical layer (PHY) interface and a PHY port of the USB hub.
4. The system of claim 1 , wherein the data path is through a PHY port and a core of the USB hub.
5. The system of claim 1 further comprising a third port for coupling to an external device, the port being a USB port.
6. The system of claim 5 , wherein the external device is a computing device with an embedded USB host.
7. The system of claim 5 further comprising a switch for coupling at least one of the first port to the third port, or the third port to the USB hub.
8. The system of claim 5 , wherein the USB hub disconnects the third port during data transfer between the first port and the second port.
9. The system of claim 1 further comprising a memory medium reader coupled to the second port and the USB hub.
10. The system of claim 1 , wherein a protocol for transferring the read data to the USB device includes at least one of a USB Class Driver for Mass Storage protocol or a Media Transfer Protocol (MTP).
11. The system of claim 1 , wherein the memory medium includes at least one of:
a secure digital (SD) flash memory card;
a MultiMediaCard (MMC) flash memory card;
a memory stick (MS) flash memory, or
an electronic MultiMediaCard (eMMC) memory device.
12. The system of claim 1 , wherein the embedded USB host is further configured to:
enumerate the USB device on the baseband processor;
provide address information to the USB device; and
configure the USB device.