Triple-Speed Ethernet Intel® FPGA IP User Guide

ID 683402
Date 5/30/2022
Public
Document Table of Contents

6.1.11.3. IEEE 1588v2 TX Timestamp Request Signals

Table 100.  IEEE 1588v2 TX Timestamp Request Signals
Signal I/O Width Description
tx_egress_timestamp_request_valid_n I 1 Assert this signal when a user-defined tx_egress_timestamp is required for a transmit frame.

Assert this signal in the same clock cycle as the start of packet (avalon_st_tx_startofpacket or avalon_st_tx_startofpacket_n is asserted).

tx_egress_timestamp_request_fingerprint I n Use this bus to specify fingerprint for the user-defined tx_egress_timestamp. The fingerprint is used to identify the user-defined timestamp.

The signal width is determined by the TSTAMP_FP_WIDTH parameter (default parameter value is 4).

The value of this signal is mapped to user_fingerprint.

This signal is only valid when you assert tx_egress_timestamp_request_valid.

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