Altera Triple Speed Ethernet MegaCore Function Manual do Utilizador Página 148

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IEEE 1588v2 PCS Phase Measurement Clock Signal
Table 7-34: IEEE 1588v2 PCS Phase Measurement Clock Signal
DescriptionWidthI/OSignal
Sampling clock to measure the latency
through the PCS FIFO buffer. The
recommended frequency is 80 MHz.
1Ipcs_phase_measure_clk
IEEE 1588v2 PHY Path Delay Interface Signals
Table 7-35: IEEE 1588v2 PHY Path Delay Interface Signals
DescriptionWidthI/OSignal
Use this bus to carry the path delay on the
transmit datapath. The delay is measured
between the physical network and MII/
GMII to adjust the egress timestamp.
Bits 0 to 9Fractional number of clock
cycles
Bits 10 to 21Number of clock cycles
22Itx_path_delay_data
Use this bus to carry the path delay on the
receive datapath. The delay is measured
between the physical network and MII/
GMII to adjust the ingress timestamp.
Bits 0 to 9Fractional number of clock
cycles
Bits 10 to 21Number of clock cycles
22Irx_path_delay_data
Altera Corporation
Interface Signals
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7-33
IEEE 1588v2 PCS Phase Measurement Clock Signal
UG-01008
2014.06.30
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