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November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
11. Deterministic Latency PHY IP Core
The Altera Deterministic Latency PHY IP Core targets protocols that require a
datapath with deterministic latency. Deterministic latency enables accurate delay
measurements and known timing for the transmit (TX) and receive (RX) datapaths as
required in applications such as wireless communication systems, emerging Ethernet
standards, and test and measurement equipment. The Deterministic Latency PHY IP
Core support 1-32 lanes with a continuous range of data rates from 611–6144 Mbps for
Arria V devices, 0.6222–9.8304 Gbps in Arria V GZ, 611–5000 Mbps in Cyclone V
devices, and 611 Mbps–12200 Mbps for Stratix V devices. By setting the appropriate
options using the MegaWizard Plug-In Manager, you can configure the Deterministic
Latency PHY IP Core to support many industry-standard protocols that require
deterministic latency, including the following protocols:
Common Public Radio Interface (CPRI)
Open Base Station Architecture Initiative (OBSAI)
1588 Ethernet
f For more information about using the Deterministic Latency PHY IP Core to
implement CPRI, refer to the application note, Implementing the CPRI Protocol Using the
Deterministic PHY IP Core.
Figure 11–1 illustrates the top-level interfaces and modules of the Deterministic
Latency PHY IP Core. As Figure 11–1, the physical coding sublayer (PCS) includes the
following functions:
TX and RX Phase Compensation FIFO
Byte serializer and deserializer
8B/10B encoder and decoder
Word aligner
TX bit slipper
Figure 11–1. Deterministic Latency PHY IP Core
Deterministic Latency PHY IP Core
Arria V, Cyclone V, or Stratix V FPGA
PCS:
Phase Comp FIFOs
Byte Serializer/
Deserializer
8B/10B
Word Aligner
Bit Slipper
PMA:
CDR
Serializer
Deserializer
TX Serial Data
RX Serial Data
to
Optical
Link
Avalon-ST TX and RX
Avalon-MM Cntrl and Status
to and from
Transceiver Reconfiguration
Controller
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