HyperTransport™ System Architecture

Link Initialization

The process of initializing each link begins during cold reset. The complete link initialization process consists of several stages:

1.

Low-level link initialization — This hardware mechanism ensures that the devices attached to a link can pass transactions safely in both directions following a cold reset. This includes: Determining the link width that can be used after cold reset. This width is based on the maximum width of the smallest transmitter or receiver, but limited to 8 bits. Establishing the default clock frequency of 200 MHz for all devices. Synchronizing the transmit and receive clocks and setting up the receive FIFOs with the appropriate load and unload values. Establishing the reference point for the beginning ...