公开(公告)号：US20190065431A1

公开(公告)日：2019-02-28

申请号：US16056885

申请日：2018-08-07

Applicant: QUALCOMM Incorporated

Inventor： Lior Amarilio ,  Chulkyu Lee ,  Harvijaysinh Raj

IPC: G06F13/42 ,  G06F3/16 ,  G06F1/12

Abstract: Providing zero-overhead frame synchronization using synchronization strobe polarity for SOUNDWIRE Extension buses is disclosed. In one aspect, a downstream-facing interface (DFI) device determines a polarity of a next synchronization strobe of a bitstream based on a value of a next frame synchronization pattern, and adjusts the next synchronization strobe of the bitstream to comprise a signal transition corresponding to the polarity. The processor-based DFI device then transmits the bitstream containing the next synchronization strobe (e.g., via a SOUNDWIRE Extension bus, such as a SOUNDWIRE-XL or SOUNDWIRE-NEXT bus, to one or more upstream-facing interface (UFI) devices). In another aspect, a processor-based UFI device receives the bitstream, and detects the encoded polarity of the synchronization strobe. The processor-based UFI device reconstructs the frame synchronization pattern based on the polarity of the synchronization strobe, and performs frame synchronization based on the frame synchronization pattern.