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Chapter 4: Backplane Ethernet 10GBASE-KR PHY IP Core 4–8
Functional Description
November 2012 Altera CorporationAltera Transceiver PHY IP Core
User Guide
Functional Description
Figure 4–2 shows the 10GBASE-KR PHY IP Core and the supporting modules
required for integration into your system. The following sections provide an overview
of these modules.
Link Training (LT), Clause 72
This module performs link training as defined in Clause 72.
The module facilitates two features:
Daisy-chain mode for non-standard link configurations where the TX and RX
interfaces connect to different link partners instead of in a spoke and hub or switch
topology.
An embedded processor mode to override the state-machine-based training
algorithm. This mode allows an embedded processor to establish link data rates
instead of establishing the link using the state-machine-based training algorithm.
Figure 4–2. Detailed 10GBASER-KR PHY IP Core Block Diagram
1G/10Gb
Ethernet
MAC
1G/10Gb Ethernet PHY MegaCore Function
1G/10Gb Ethernet PHY MegaCore Function
1G/10Gb Ethernet PHY MegaCore Function
Native PHY Hard IP
257.8
MHz
40-b
40-b
TX
Serial
Data
RX
Serial
Data
1.25 Gb/
10.3125 Gb
Hard PMA
Link
Status
Sequencer
S
Reset
Controller
State
Machine
Arbiter
rate change request
ack to user
rate change
req from user
Transceiver
Reconfig
Controller
Auto
Negotiation
Link
Training
10 Gb
Ethernet
Hard PCS
Cntl &
Status
RX GMII Data
TX GMII Data
@ 125 MHz
RX XGMII Data
TX XGMII Data
Shared Across Multiple Channels
@156.25 MHz
1 GIGE
PCS
1G/10Gb
Ethernet
MAC
1G/10Gb
Ethernet
MAC
1G
10G
1 Gb
Ethernet
Standard
Hard PCS
322.265625 or
644.53125
Ref Clk
62.5 or 125
Ref Clk
ATX/CMU
TX PLL
For
10 GbE
ATX/CMU
TX PLL
For 1 GbE
Can Share
Across Multiple
Channels
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