User guide

Word

Addr

Bit R/W Name Description

0x4

RW Link Training

enable

When 1, enables the 10GBASE-KR start-up protocol.

When 0, disables the 10GBASE-KR start-up protocol.

The default value is 1. For more information, refer to

Clause 72.6.10.3.1 and 10GBASE-KR PMD control

2007.

1 RW dis_max_wait_tmr When set to 1, disables the LT max_wait_timer . Used

for characterization mode when setting much longer bit

error rate (BER) timer values.

2 RW quick_mode When set to 1, only the init and preset values calculate

the best BER.

3 RW pass_one When set to 1, the BER algorithm considers more than

the first local minimum when searching for the lowest

BER. The default value is 1.

7:4 RW main_step_cnt [3:0] Specifies the number of equalization steps for each main

tap update. There are about 20 settings for the internal

algorithm to test. The valid range is 1-15. The default

value is 4'b0010.

11:8 RW prpo_step_cnt [3:0] Specifies the number of equalization steps for each pre-

and post-tap update. From 16-31 steps are possible. The

default value is 4'b0001.

UG-01143

2015.05.11

2-191

Implementing Protocols in Arria 10 Transceivers

Altera Corporation

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