- Patent Title: Bus ownership for a system power management interface (SPMI) bus
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Application No.: US16997505Application Date: 2020-08-19
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Publication No.: US11327922B2Publication Date: 2022-05-10
- Inventor: Sharon Graif , Sai Ganapathy Srinivasan , Navdeep Mer , Sriharsha Chakka
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Qualcomm Incorporated
- Main IPC: G06F13/42
- IPC: G06F13/42 ; G06F13/40 ; G06F1/08

Abstract:
The systems and methods for bus ownership in a system power management interface (SPMI) bus may include two or more masters on the SPMI bus, and bus ownership may be passed between masters. The current owner of the bus is responsible for providing a clock signal on the clock line of the SPMI bus. To avoid problems caused by ringing of the clock signal being sent on a conductor that exceeds the SPMI specification, the original master (from whom bus ownership is being transferred) holds the clock line of the SPMI bus at a logical low for a clock delay value that is based on conductor length.
Public/Granted literature
- US20220058153A1 BUS OWNERSHIP FOR A SYSTEM POWER MANAGEMENT INTERFACE (SPMI) BUS Public/Granted day:2022-02-24
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