Method and apparatus to generate platform correctable TX-RX

摘要

A programmable link training and status state machine is disclosed. The programmable finite state machine includes extra states, or shadow states, which are strategically used to debug a system design or to accommodate unexpected behavior, such as when the specifications of the design change. The programmable finite state machine is thus a mechanism to design in correctable logic, enabling the logic to be corrected in silicon and used in succeeding iterations of a product line.

主权项

1. A programmable link training and status state machine (LTSSM) comprising:
a plurality of states that are interconnected in a predefined arrangement, wherein an incoming signal moved from a first state of the plurality of states to a second state of the plurality of states is based on first predefined conditions, the first predefined conditions comprising:
conditions to enter or exit the first state; andcontrol outputs of the first state; and corrective logic to adjust one or more of the first predefined conditions, resulting in second predefined conditions, wherein the incoming signal moves from the first state to the second state based on the second predefined conditions; wherein the programmable LTSSM enables a transceiver to perform link training of a channel between the transceiver and a remote receiver.