Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Function - Manual (Page 25)

Parameter Type Range Default
Setting
Parameter Description
Pause ability–
C1
Boolean • True
• False
True If this parameter is turned on, the IP core indicates
on the Ethernet link that it supports asymmetric
pauses as defined in Annex 28B of Section 2 of IEEE
Std 802.3–2008.
Link Training: PMA Parameters
VMAXRULE Integer
0–31 30
Specifies the maximum V
OD
. The default value, 60,
represents 1200 mV.
VMINRULE Integer
0–31 6
Specifies the minimum V
OD
. The default value, 9,
represents 165 mV.
VODMINRULE Integer
0–31 14
Specifies the minimum V
OD
for the first tap. The
default value, 24, represents 440 mV.
VPOSTRULE Integer
0–25 25
Specifies the maximum value that the internal
algorithm for pre-emphasis will ever test in
determining the optimum post-tap setting.
VPRERULE Integer
0–16 16
Specifies the maximum value that the internal
algorithm for pre-emphasis will ever test in
determining the optimum pre-tap setting.
PREMAINVAL Integer
0–31 30
Specifies the Preset V
OD
value. This value is set by the
Preset command of the link training protocol,
defined in Clause 72.6.10.2.3.1 of IEEE Std 802.3ap–
2007.
PREPOSTVAL Integer
0–25 0
Specifies the preset Post-tap value.
PREPREVAL Integer
0–16 0
Specifies the preset Pre-tap value.
INITMAINVAL Integer
0–31 25
Specifies the initial V
OD
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.
INITPOSTVAL Integer
0–25 13
Specifies the initial Post-tap value.
INITPREVAL Integer
0–16 3
Specifies the initial Pre-tap value.
Link Training: General
UG-01172
2015.05.04
IP Core Parameters 2-11
Getting Started Altera Corporation
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