Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 2/14/2023
Public

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17.6.5.2.1. Ordinary Clock

The ordinary clock in a domain supports a single copy of the protocol. The ordinary clock has a single PTP state and a single physical port. In typical industrial automation applications, an ordinary clock is associated with an application device such as a sensor or an actuator. In telecom applications, the ordinary clock can be associated with a timing demarcation device.

The ordinary clock can be a grandmaster or a slave clock. It supports the following features:

  • Sends and receives PTP messages. The timestamp snapshot can be controlled as described in the Timestamp Control (gmacgrp_timestamp_control) register.
  • Maintains the data sets such as timestamp values.

The table below shows the messages for which you can take the timestamp snapshot on the receive side for Master and slave nodes. For an ordinary clock, you can take the snapshot of either of the following PTP message types: version 1 or version 2. You cannot take the snapshots for both PTP message types. You can take the snapshot by setting the control bit (tsver2ena) and selecting the snapshot mode in the Timestamp Control (gmacgrp_timestamp_control) register.

Table 184.  Ordinary Clock: PTP Messages for Snapshot
Master Slave
Delay_Req SYNC