Figure 7-25: egress 2-step operation – Altera Triple Speed Ethernet MegaCore Function User Manual
Page 162
Figure 7-25: Egress 2-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
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Don’t-care
Altera Corporation
Interface Signals
7-47
IEEE 1588v2 Timestamp
UG-01008
2014.06.30