Invention Grant
- Patent Title: Self referenced single-ended chip to chip communication
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Application No.: US16253100Application Date: 2019-01-21
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Publication No.: US10756849B2Publication Date: 2020-08-25
- Inventor: Jafar Savoj , Praveen R. Singh , Brian S. Leibowitz , Emerson S. Fang
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert Hood Munyon Rankin and Goetzel PC
- Agent Rory D. Rankin
- Main IPC: H04L1/02
- IPC: H04L1/02 ; H03K19/0175 ; H04L25/02 ; H04L25/06 ; H04L25/03

Abstract:
A system and method for efficiently transporting data in a computing system are contemplated. In various embodiments, a computing system includes a source, a destination and multiple lanes between them for transporting data. Multiple receivers in the destination has a respective termination resistor connected to a single integrating capacitor, which provides a reference voltage to the multiple receivers. The receivers reconstruct the received data by comparing the corresponding input signals to the reference voltage. The source includes a table storing code words. The source maps a generated data word to a code word, which is sent to the destination. The destination maps the received code word to the data word. The values of the code words are selected to maintain a nearly same number of Boolean ones on the multiple lanes over time as a number of Boolean zeroes.
Public/Granted literature
- US20200235856A1 SELF REFERENCED SINGLE-ENDED CHIP TO CHIP COMMUNICATION Public/Granted day:2020-07-23
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