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IEEE 1588v2 Timestamp Interface Signals
The following table lists the IEEE 1588v2 timestamp interface signals. These interface signals are only applicable to design examples with IEEE 1588v2.
Signal | Direction | Width | Description |
---|---|---|---|
tx_egress_timestamp_96b_valid[] | output | [NUM_CHANNELS] | When asserted, this signal qualifies the timestamp on tx_egress_timestamp_96b_data[] for the transmit frame whose fingerprint is specified by tx_egress_timestamp_96b_fingerprint[]. |
tx_egress_timestamp_96b_data[][] | output | [NUM_CHANNELS][96] | Carries the 96-bit egress timestamp in the following format:
|
tx_egress_timestamp_96b_fingerprint[][] | output | [NUM_CHANNELS][TSTAMP_FP_WIDTH] | The fingerprint of the transmit frame, which is received on tx_egress_timestamp_request_data[]. This fingerprint specifies the transmit frame the egress timestamp on tx_egress_timestamp_96b_data[] is for. |
tx_egress_timestamp_64b_valid[] | output | [NUM_CHANNELS] | When asserted, this signal qualifies the timestamp on tx_egress_timestamp_64b_data[] for the transmit frame whose fingerprint is specified by tx_egress_timestamp_64b_fingerprint[]. |
tx_egress_timestamp_64b_data[][] | output | [NUM_CHANNELS][64] | Carries the 64-bit egress timestamp in the following format:
|
tx_egress_timestamp_64b_fingerprint[][] | output | [NUM_CHANNELS][TSTAMP_FP_WIDTH] | The fingerprint of the transmit frame, which is received on tx_egress_timestamp_request_data[]. This fingerprint specifies the transmit frame the egress timestamp on tx_egress_timestamp_64b_data[] is for. |
rx_ingress_timestamp_96b_valid[] | output | [NUM_CHANNELS] | When asserted, this signal qualifies the timestamp on rx_ingress_timestamp_96b_data[]. The MAC IP core asserts this signal in the same clock cycle it asserts avalon_st_rx_startofpacket. |
rx_ingress_timestamp_96b_data[][] | output | [NUM_CHANNELS][96] | Carries the 96-bit ingress timestamp in the following format:
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rx_ingress_timestamp_64b_valid[] | output | [NUM_CHANNELS] | When asserted, this signal qualifies the timestamp on rx_ingress_timestamp_64b_data[]. The MAC IP core asserts this signal in the same clock cycle it asserts avalon_st_rx_startofpacket. |
rx_ingress_timestamp_64b_data[][] | output | [NUM_CHANNELS][64] | Carries the 64-bit ingress timestamp in the following format:
|