Altera 10-Gbps Ethernet MAC MegaCore Function - Manual (Page 149)

9–30 Chapter 9: Interface Signals
10-Gbps Ethernet MAC MegaCore Function User Guide February 2014 Altera Corporation
Figure 9–12 shows the TX timestamp signals for the IEEE 1588v2 feature in a two-step
operation.
Figure 9–12. Egress Two-Step Operation
Egress Two-Step Operation, IEEE 1588v2, PTP Packet
2-step Timestamp Request,Input
tx_egress_timestamp_request_valid
tx_egress_timestamp_request_data[N:0]
2-step Timestamp Return,Output
tx_egress_timestamp_96b_valid
tx_egress_timestamp_96b_fingerprint[N:0]
tx_egress_timestamp_96b_data[95:0]
tx_egress_timestamp_64b_valid
tx_egress_timestamp_64b_fingerprint[N:0]
tx_egress_timestamp_64b_data[63:0]
1-step Timestamp Insert,Input
tx_etstamp_ins_ctrl_timestamp_insert
tx_etstamp_ins_ctrl_timestamp_format
1-step Residence Time Update,Input
tx_etstamp_ins_ctrl_residence_time_update
tx_etstamp_ins_ctrl_ingress_timestamp_96b[95:0]
tx_etstamp_ins_ctrl_ingress_timestamp_64b[63:0]
tx_etstamp_ins_ctrl_residence_time_calc_format
1-step IPv4 and IPv6 Checksum,Input
tx_etstamp_ins_ctrl_checksum_zero
tx_etstamp_ins_ctrl_checksum_correct
1-step Location Offset,Input
tx_etstamp_ins_ctrl_offset_timestamp[15:0]
tx_etstamp_ins_ctrl_offset_correction_field[15:0]
tx_etstamp_ins_ctrl_offset_checksum_field[15:0]
tx_etstamp_ins_ctrl_offset_checksum_correction[15:0]
Fingerprint
Fingerprint
96b Egress Timestamp
Fingerprint
64b Egress Timestamp
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