What is precision of i.MX6 Quad IEEE 1588 in nano second?

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What is precision of i.MX6 Quad IEEE 1588 in nano second?

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m_c
Senior Contributor I

What is precision of i.MX6 Quad IEEE 1588 in nano second?

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Yuri
NXP Employee
NXP Employee

Hello,

  Yes, theoretically for 125 MHz, +/- 8ns.

Regards,

Yuri.

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Yuri
NXP Employee
NXP Employee

Hello,

  Customers can look at section 23.6.10.1.1 (Adjustable timer implementation) of 

of i.MX 6Dual/6Quad Reference Manual, Rev. 5, 06/2018: "The counter produces the current time.

During each time-stamping clock cycle, a constant value is added to the current time as programmed

in ENETn_ATINC. The value depends on the chosen time-stamping clock frequency. For example, if it

operates at 125 MHz, setting the increment to eight represents 8 ns."

  Section 23.6.10.5 (Input Capture and Output Compare) of the RM, describes the Capture

Compare block, which can be used to provide precise hardware timing for input and output events.

  

Have a great day,
Yuri

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YanjunLuo
Contributor IV

Hi Yuri,

If I set the time-stamping clock frequency to 125MHz, can I get a recovered 1PPS within +/- 10nS difference compare the original IEEE1588 server's 1PPS source? Or what kind of result I can get? Like +/- 20nS?

Regards,

Yanjun Luo.

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Yuri
NXP Employee
NXP Employee

Hello,

  Yes, theoretically for 125 MHz, +/- 8ns.

Regards,

Yuri.

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YanjunLuo
Contributor IV

Thank you Yuri!

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