Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Manuel d'utilisateur Page 25

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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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