Altera UG-01080 Guía de usuario Pagina 49

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November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
4. Backplane Ethernet 10GBASE-KR PHY
IP Core
The Backplane Ethernet 10GBASE-KR PHY MegaCore
®
function is available for
Stratix
®
V and Arria V GZ devices. This transceiver PHY allows you to instantiate
both the hard Standard PCS and the higher performance hard 10G PCS and hard
PMA for a single Backplane Ethernet channel. It implements the functionality
described in the IEEE Std 802.3ap-2007 Standard. Because each instance of the
10GBASE-KR PHY IP Core supports a single channel, you can create multi-channel
designs by instantiating more than one instance of the core.
Figure 4–1 shows the 10GBASE-KR transceiver PHY and additional blocks that are
required to implement this core in your design.
The Backplane Ethernet 10GBASE-KR PHY IP Core includes the following new
modules to enable operation over a backplane:
Link Training (LT)— The LT mechanism allows the 10GBASE-KR PHY to
automatically configure the link-partner TX PMDs for the lowest Bit Error Rate
(BER). LT is defined in Clause 72 of IEEE Std 802.3ap-2007.
Auto negotiation (AN)—The Altera 10GBASE-KR PHY IP Core can auto-negotiate
between 1000BASE-KX (1GbE) and 10GBASE-KR (10GbE) PHY types. The AN
function is mandatory for Backplane Ethernet. It is defined in Clause 73 of the
IEEE Std 802.3ap-2007.
Figure 4–1. 10GBASE-KR PHY MegaCore Function and Supporting Blocks
Altera Device with 10.3125+ Gbps Serial Transceivers
10GBASE-KR PHY MegaCore Function
Native PHY Hard IP
257.8
MHz
40-b
40-b
TX
Serial
Data
RX
Serial
Data
Copper
Backplane
322.265625 MHz
or 644.53125 MHz
Reference Clock
62.5 MHz or 125 MHz
Reference Clock
Legend
Hard IP
Soft IP
ATX/CMU
TX PLL
For
10 GbE
ATX/CMU
TX PLL
For 1 GbE
1.25 Gb/
10.3125 Gb
Hard PMA
Link
Status
Sequencer
10 Gb
Ethernet
Hard PCS
1 Gb
Ethernet
Standard
Hard PCS
To/From Modules in the PHY MegaCore
Control and Status
Registers
Avalon-MM
PHY Management
Interface
PCS Reconfig
Request
PMA Reconfig
Request
Optional
1588 TX and
RX Latency
Adjust 1G
and 10G
To/From
1G/10Gb
Ethernet
MAC
RX GMII Data
TX GMII Data
@ 125 MHz
RX XGMII Data
TX XGMII Data
@156.25 MHz
1 GIGE
PCS
10GBASE-KR
Auto-Negotiation
10GBASE-KR
Link Training
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