57.7.9.8.3 Pcycle Timer

The packet cycle timer is reset to its initial value whenever the backlog is changed. It is started (begins counting down at its current value) whenever the MAC layer becomes idle. An idle MAC layer is defined as:

• Not receiving
• Not transmitting,
• Not waiting to transmit,
• Not timing Beta1,
• Not waiting for priority slots, and not waiting for the first Wbase randomizing window to complete.

On transition from idle to either transmit or receive, the packet cycle timer is halted.

The pcycle timer value can be configured in FLEX_US_TTGR. Note that ‘0’ value is not allowed.