Intel® Arria® 10 Transceiver PHY User Guide

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ID 683617
Date 3/28/2022
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2.6.3.4.4. 10GBASE-KR Optional Parameters

Table 111.  Optional ParametersIn the following table, the exact correspondence between numerical values and voltages is pending characterization of the Native PHY.
Name Value Description
PHY Management clock (MGMT_CLK) frequency in MHz 100-162

Determines the value of the Link Fail Inhibit timer in IEEE 802.3 clause 73.10.2.

  • 500 - 510 ms for BASE-R
  • 40 – 50 ms for GbE, XAUI

The default value is 125.

VMAXRULE VOD tap MAX Rule 0-31 Specifies the maximum VOD. The default value is 30.
VMINRULE Device VMIN Rule 0-31 Specifies the minimum VOD. The default value is 6.
VODMINRULE VOD tap MIN Rule 0-31 Specifies the minimum VOD for the first tap. The default value is 14.
VPOSTRULE 0-38 Specifies the maximum value that the internal algorithm for pre-emphasis tests in determining the optimum post-tap setting. The default value is 25.
VPRERULE 0-31 Specifies the maximum value that the internal algorithm for pre-emphasis tests in determining the optimum pre-tap setting. The default value is 16.
PREMAINVAL Preset VOD tap Value 0-31 Specifies the Preset VOD value. This value is set by the Preset command of the link training protocol, defined in Clause 72.6.10.2.3.1 of the Link Training protocol. This is the value from which the algorithm starts. The default value is 30.
PREPOSTVAL 0-31 Specifies the preset Post-tap value. The default value is 0.
PREPREVAL 0-15 Specifies the preset Pre-tap value. The default value is 0.
INITMAINVAL Init VOD tap Value 0-31 Specifies the initial VOD value. This value is set by the Initialize command of the link training protocol, defined in Clause 72.6.10.2.3.2 of IEEE Std 802.3ap–2007. The default value is 25.
INITPOSTVAL Init Post tap Value 0-38 Specifies the initial Post-tap value. The default value is 13.
INITPREVAL Init Pre tap Value 0-15 Specifies the initial Pre-tap value. The default value is 3.

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