Altera Stratix GX Transceiver Manuel d'utilisateur Page 133

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 318
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 132
Altera Corporation 5–21
January 2005 Stratix GX Transceiver User Guide
XAUI Mode
Table 5–4 lists the XGMII character-to -PCS code-group mapping.
8B/10B Encoder
The 8B/10B encoder is part of the Stratix GX transceiver blocks. The
purpose of the 8B/10B encoder is to translate 8-bit data and a 1-bit control
identifier (via tx_ctrlenable) into a 10-bit DC balanced data stream.
For additional information about the 8B/10B code itself, refer to “8B/10B
Code” on page 10–1. The 8B/10B encoder translates the 8-bit data or 8-bit
control character to its 10-bit equivalent. The conversion format is shown
in Figure 5–18. The10-bit resultant data is transmitted LSB first by the
serializer.
Table 5–4. XGMII Character to PCS Code-Group Mapping Note (1)
XGMII XGMII TXD PCS Code-Group Description
0 00 though FF Dxx,y Normal data
transmission
1 07 K28.0 or K28.3 or
K28.5
Idle in ||I||
1 07 K28.5 Idle in ||T||
1 9C K28.4 Sequence
1 FB K27.7 Start
1 FD K29.7 Terminate
1 FE K30.7 Error
1 Any other value K30.7 Invalid XGMII
character
Note to Ta b le 5 –4 :
(1) Values in TXD column are in hexadecimal.
Vue de la page 132
1 2 ... 128 129 130 131 132 133 134 135 136 137 138 ... 317 318

Commentaires sur ces manuels

Pas de commentaire