Altera UG-01080 Betriebsanweisung Seite 78

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4–30 Chapter 4: Backplane Ethernet 10GBASE-KR PHY IP Core
Register Interface and Register Descriptions
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
0xD4
29:24 RO
LP coefficient
status[5:0]
Status report register reflects the contents of the second,
16-bit word of the training frame most recently received
from the control channel: The following fields are defined:
[5:4]: Coefficient (+1)
2’b11: Maximum
2’b01: Minimum
2’b10: Updated
2’b00: Not updated
[3:2]: Coefficient (0) (same encoding as [5:4])
[1:0]: Coefficient (-1) (same encoding as [5:4])
For more information, refer to bit 1.153.5:0 in Clause
45.2.1.79 of IEEE 802.3ap-2007.
30 RO
LP Receiver ready
When set to 1, the link partner receiver has determined
that training is complete and is prepared to receive data.
When set to 0, the link partner receiver is requesting that
training continue.
Values for the receiver ready bit are defined in Clause
72.6.10.2.4.4. For more information, refer to bit 1.153.5:0
in Clause 45.2.1.79 of IEEE 802.3ap-2007.
0xD5
5:0 R
LT VOD setting
Stores the most recent V
OD
setting that LT specified using
the Transceiver Reconfiguration Controller IP core. It
reflects Link Partner commands to fine-tune the TX
pre-emphasis taps.
12:8 R
LT Post-tap setting
Stores the most recent post-tap setting that LT specified
using the Transceiver Reconfiguration Controller IP core.
It reflects Link Partner commands to fine-tune the TX
pre-emphasis taps.
19:16 R
LT Pre-tap setting
Stores the most recent pre-tap setting that LT specified
using the Transceiver Reconfiguration Controller IP core.
It reflects Link Partner commands to fine-tune the TX
pre-emphasis taps.
0xD6
5:0 RW
LT VODMAX ovrd
Override value for the VMAXRULE parameter. When
enabled, this value substitutes for the VMAXRULE to allow
channel-by-channel override of the device settings. This
only effects the local device TX output for the channel
specified. This value must be greater than the
INITMAINVAL parameter for proper operation. Note this
will also override the PREMAINVAL parameter value.
To create a multi-channel design, you must create multiple
instantiations of the single-change 10GBASE-KR IP Core.
Bit 0 of this register overrides to channel 0, bit 1 overrides
channel 1, and so on.
6RW
LT VODMAX ovrd Enable
When set to 1, enables the override value for the
VMAXRULE parameter stored in the
LT VODMAX ovrd
register field.
Table 4–18. 10GBASE-KR Register Definitions (Part 11 of 12)
Word
Address
Bit R/W Name Description
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