Four states define how a CCIX link moves from deactivation to activation, and activation to deactivation.
Note: When moving activation to deactivation, it is important that the credit exchange is carefully controlled to avoid loss of data or credits in the CCIX link. The CCIX link must be in quiesce state.
The following table describes the four state transitions.
|The CCIX link is in reset state or low power state. All the credits are with receiver and transmitter, and are not permitted to send any valid data.
|The CCIX link is in operation state. Both components can active transfer valid data and credits.
|Intermediate state when moving from Stop to Run.
|Intermediate state when moving from Run to Stop.
The following figure shows the four state transitions that are based on a pair of interface signals used as a concatenation:
Figure 1. CCIX Link State Transitions