Visible to Intel only — GUID: ghf1537951885506
Ixiasoft
Visible to Intel only — GUID: ghf1537951885506
Ixiasoft
2.9.2. 1588 Precision Time Protocol Interfaces
If you turn on Enable IEEE 1588 PTP, the E-Tile Hard IP for Ethernet Intel FPGA IP processes and provides 1588 Precision Time Protocol (PTP) timestamp information as defined in the IEEE 1588-2008 Precision Clock Synchronization Protocol for Networked Measurement and Control Systems Standard. This feature supports PHY operating speed with a constant timestamp accuracy as specified in the PTP Timestamp Accuracy per Ethernet Data Rate table.
1588 PTP packets carry timestamp information. The E-Tile Hard IP for Ethernet Intel FPGA IP updates the incoming timestamp information in a 1588 PTP packet to transmit a correct updated timestamp with the data it transmits on the Ethernet link, using a one-step or two-step clock.
A fingerprint can accompany a 1588 PTP packet. You can use this information for client identification and other client uses. If provided fingerprint information, the IP core passes it through unchanged.
The IP core connects to a time-of-day (TOD) module that continuously provides the current time of day based on the input clock frequency. Because the module is outside the E-Tile Hard IP for Ethernet Intel FPGA IP, you can use the same module to provide the current time of day for multiple modules in your system.
Section Content
Implementing a 1588 System That Includes a E-Tile Hard IP for Ethernet Intel FPGA IP
PTP Timestamp Accuracy
PTP Transmit Functionality
PTP Receive Functionality
External Time-of-Day Module for 1588 PTP Variations
PTP Timestamp and TOD Formats
10G/25G TX and RX Unit Interval Adjustment
10G/25G TX and RX PTP Extra Latency
100G PTP TX User Flow
100G PTP RX User Flow
100G RX Virtual Lane Offset Calculation for No FEC Variants
100G UI Adjustment
Minimum and Maximum Reference Time (TAM) Interval for UI Measurement (Hardware)
PTP System Considerations
Logic Lock Regions Requirements for PTP Accuracy Advanced Mode