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November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
13. Arria V Transceiver Native PHY IP
Core
The Arria V Transceiver Native PHY IP Core provides direct access to all control and
status signals of the transceiver channels. Unlike other PHY IP Cores, the Native PHY
IP Core does not include an Avalon Memory-Mapped (Avalon-MM) interface.
Instead, it exposes all signals directly as ports. The Arria V Transceiver Native PHY IP
Core provides the following datapaths:
Standard PCS—When you enable the Standard PCS, you can select the PCS
functions and control and status ports that your transceiver PHY requires.
PMA Direct—When you select PMA Direct mode, the Native PHY provides direct
access to the PMA from the FPGA fabric; consequently, the latency for transmitted
and received data is lower. However, you must implement any PCS function that
your design requires in the FPGA fabric.
The Native Transceiver PHY does not include an embedded reset controller. You can
either design custom reset logic or incorporate Altera’s “Transceiver PHY Reset
Controller IP Core” to implement reset functionality. The Native Transceiver PHY’s
primary use in Arria V GT devices is for data rates greater than 6.5536 Gbps.
Figure 13–1 illustrates the use of the Arria V Transceiver Native PHY IP Core. As this
figure illustrates, TX PLL and clock data recovery (CDR) reference clocks from the
pins of the device are input to the PLL module and CDR logic. When enabled, the
Standard PCS drives TX parallel data and receives RX parallel data. In PMA Direct
mode, the PMA serializes TX data it receives from the fabric and drives RX data to the
fabric.
Figure 13–1. Arria Native Transceiver PHY IP Core
CMU
PLLs
PMA
altera_xcvr_native_av
Transceiver Native PHY
Reconfiguration to XCVR
Reconfiguration from XCVR
TX and RX Resets
Calilbration Busy
PLL and RX Locked
RX PCS Parallel Data
TX PCS Parallel Data
CDR Reference Clock
TX PLL Reference Clock
RX Serial Data
to
FPGA fabric
TX PMA Parallel Data
RX PMA Parallel Data
TX Serial Data
Serializer
De-
Serializer
Standard
PCS
(optional)
Serializer/
Clock
Generation
Block
Transceiver
Reconfiguration
Controller
Transceiver
PHY Reset
Controller
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