User guide

Word
Addr
Bit R/W Name Description
0x4
D0
14:12
RW equal_cnt [2:0]
Adds hysteresis to the error count to avoid local
minimums. The following values are defined:
• 000 = 0
• 001 = 1
• 010 = 2
• 011 = 3
• 100 = 4
• 101 = 8
• 110 = 16
• 111 = Reserved
The default value is 010.
15
RW disable Initialize
PMA on max_wait_
timeout
When set to 1, PMA values (VOD, pre-tap, post-tap) are
not initialized upon entry into the Training_Failure
state. This happens when max_wait_timer_done, which
sets training_failure = true (reg 0xD2 bit 3). Used for
University of New Hampshire (UNH) testing. When set
to 0, PMA values are initialized upon entry into
Training_Failure state. Refer to Figure 72-5 of IEEE
802.3ap-2007 for more details.
16 RW Ovride LP Coef
enable
When set to 1, overrides the link partner's equalization
coefficients; software changes the update commands sent
to the link partner TX equalizer coefficients. When set to
0, uses the Link Training logic to determine the link
partner coefficients. Used with 0x4D1 bit-4 and 0x4D4
bits[7:0].
17 RW Ovride Local RX
Coef enable
When set to 1, overrides the local device equalization
coefficients generation protocol. When set, the software
changes the local TX equalizer coefficients. When set to
0, uses the update command received from the link
partner to determine local device coefficients. Used with
0x4D1 bit-8 and 0x4D4 bits[23:16]. The default value is 1.
0x4
D0
22 RW adp_ctle_mode Reserved. Default = 000
28:24 RW Manual ctle Reserved
31:29 RW max_post_step[2:0] Reserved
2-192
Register Definitions
UG-01143
2015.05.11
Altera Corporation
Implementing Protocols in Arria 10 Transceivers
Send Feedback