Ethernet AVB Endpoint PTP Signals - 9.0 English

Tri-Mode Ethernet MAC LogiCORE IP Product Guide (PG051)

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9.0 English

The following table defines the signals output from the core by the Precise Timing Protocol (PTP) block in the Figure 1. These signals, present only when the AVB Endpoint is included in the TEMAC, are provided for reference only and can be used by an application.

Table 1. AVB Specific Signals
Signal Direction Clock Domain Description
rtc_nanosec_field Out gtx_clk This is the synchronized nanoseconds field from the RTC. Updates to RTC Nanoseconds Field Offset register are reflected here.
rtc_sec_field Out gtx_clk This is the synchronized seconds fields from the RTC. Updates to RTC Seconds Field Offset register are not reflected here.
clk8k Out gtx_clk This is an 8 kHz clock, which is derived from and synchronized in frequency to the Real-Time Clock. The period of this clock, that is, 125 μs is useful in timing the SR class measurement intervals.
rtc_nanosec_field_1722 Out gtx_clk The IEEE1722 specification contains a different format for the Real-Time Clock provided here as an extra port. This is derived and is in sync with the IEEE802.1 AS Real-Time Clock.