Altera UG-01080 Betriebsanweisung Seite 253

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 484
  • Inhaltsverzeichnis
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 252
Chapter 12: Stratix V Transceiver Native PHY IP Core 12–15
Standard PCS Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
f For more information refer to the Byte Serializer and Byte Deserializer sections in
Transceiver Architecture in Stratix V Devices.
8B/10B
The 8B/10B encoder generates 10-bit code groups from the 8-bit data and 1-bit control
identifier. In 8-bit width mode, the 8B/10B encoder translates the 8-bit data to a 10-bit
code group (control word or data word) with proper disparity. The 8B/10B decoder
decodes the data into an 8-bit data and 1-bit control identifier. Table 12–15 describes
the 8B/10B encoder and decoder options.
f For more information refer to the 8B/10B Decoder and 8B/10B Encoder sections in
Transceiver Architecture in Stratix V Devices.
Rate Match FIFO
The rate match FIFO compensates for the very small frequency differences between
the local system clock and the RX recovered clock. Table 12–16 describes the rate
match FIFO parameters.
Table 12–14. Byte Serializer and Deserializer Parameters
Parameter Range Description
Enable TX byte serializer On/Off
When you turn this option On, the PCS includes a TX byte
serializer which allows the PCS to run at a lower clock frequency
to accommodate a wider range of FPGA interface widths.
Enable RX byte deserializer On/Off
When you turn this option On, the PCS includes an RX byte
deserializer and deserializer which allows the PCS to run at a
lower clock frequency to accommodate a wider range of FPGA
interface widths.
Table 12–15. 8B/10B Encoder and Decoder Parameters
Parameter Range Description
Enable TX 8B/10B encoder On/Off
When you turn this option On, the PCS includes the 8B/10B
encoder.
Enable TX 8B/10B disparity
control
On/Off
When you turn this option On, the PCS includes disparity control
for the 8B/10B encoder. Your force the disparity of the 8B/10B
encoder using the
tx_forcedisp
control signal.
Enable RX 8B/10B decoder On/Off
When you turn this option On, the PCS includes the 8B/10B
decoder.
Seitenansicht 252
1 2 ... 248 249 250 251 252 253 254 255 256 257 258 ... 483 484

Kommentare zu diesen Handbüchern

Keine Kommentare