Current RTC Value Registers - 9.0 English

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

Document ID
PG051
Release Date
2023-11-07
Version
9.0 English

The following table describes the nanoseconds field value register for the nanoseconds field of the RTV. When read, this returns the latest value of the counter. The registers defined in this section are linked. When this nanoseconds value register is read, the entire RTC (including the seconds field) is sampled.

Table 1. Current RTC Nanoseconds Value (0x12814)
Bits Default Value Type Description
31:30 0 RO Reserved
29:0 0 RO

Current Value of the synchronized RTC nanoseconds field.

Note: A read from this register samples the entire RTC counter (synchronized) so that the Epoch and Seconds field are held static for a subsequent read.

The following table describes the lower 32 bits of the seconds value register for the seconds field of the RTC. When read, this returns the latest value of the counter. The registers defined in this section are linked. When the nanoseconds value register is read (see Table 1), the entire RTC is sampled.

Table 2. Current RTC Seconds Field Value Bits [31:0] (0x12818)
Bits Default Value Type Description
31:0 0 RO Sampled Value of the synchronized RTC Seconds field (Bits[31:0]).

The following table describes the upper 16 bits of the seconds value register for the seconds field of the RTC. When read, this returns the latest value of the counter. The registers defined in this section are linked. When the nanoseconds value register is read (see Table 1), the entire RTC is sampled.

Table 3. Current RTC Seconds Field Value Bits [47:32] (0x1281C)
Bits Default Value Type Description
31:16 0 RO Reserved
15:0 0 RO Sampled Value of the synchronized RTC Seconds field (Bits[47:32]).