This policy is active when *VALID
is detected to be asserted.
When enabled, it drives the *READY
Low for low_time
and then drives the *READY
High until either
event_count
handshakes have been received OR event_count_reset
number of cycles have passed. The policy
repeats until the channel is given a different policy.
Figure 1. GEN_AFTER_VALID_EVENTS/RAND_AFTER_VALID_EVENTS