Invention Grant
- Patent Title: Hardware transmit equalization for high speed
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Application No.: US16130791Application Date: 2018-09-13
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Publication No.: US10541841B1Publication Date: 2020-01-21
- Inventor: Shiqi Sun , Michael J. Tresidder , Yanfeng Wang
- Applicant: Advanced Micro Devices, Inc. , ATI Technologies ULC
- Applicant Address: US CA Santa Clara CA Markham
- Assignee: Advanced Micro Devices, Inc.,ATI Technologies ULC
- Current Assignee: Advanced Micro Devices, Inc.,ATI Technologies ULC
- Current Assignee Address: US CA Santa Clara CA Markham
- Agency: Meyertons Hood Kivlin Kowert and Goetzel PC
- Agent Rory D. Rankin
- Main IPC: H03H7/30
- IPC: H03H7/30 ; H04L25/03 ; H04L7/00 ; H04L25/02

Abstract:
Systems, apparatuses, and methods for performing transmit equalization at a target high speed are disclosed. A computing system includes at least a transmitter, receiver, and a communication channel connecting the transmitter and the receiver. The communication channel includes a plurality of lanes which are subdivided into a first subset of lanes and a second subset of lanes. During equalization training, the first subset of lanes operate at a first speed while the second subset of lanes operate at a second speed. The first speed is the desired target speed for operating the communication link while the second speed is a relatively low speed capable of reliably carrying data over a given lane prior to equalization training. The first subset of lanes are trained at the first speed while feedback is conveyed from the receiver to the transmitter using the second subset of lanes operating at the second speed.
Information query