HC4GX15 Datasheet, PDF (425/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: HardCopy IV GX Transceiver Architecture
Functional Modes
1–161
Figure 1–129 shows an example of rate match insertion in the case where two ||R||
columns are required to be inserted.
Figure 1–129. Rate Match Insertion in XAUI Mode
First ||R||
Column
Second ||R||
Column
dataout[3]
K28.5
K28.3
K28.5
K28.0
K28.5
K28.0
dataout[2]
K28.5
K28.3
K28.5
K28.0
K28.5
K28.0
dataout[1]
K28.5
K28.3
K28.5
K28.0
K28.5
K28.0
dataout[0]
K28.5
K28.3
K28.5
K28.0
K28.5
K28.0
datain[3]
K28.5
K28.3
K28.5
K28.0
K28.0
K28.0
K28.5
K28.0
datain[2]
K28.5
K28.3
K28.5
K28.0
K28.0
K28.0
K28.5
K28.0
datain[1]
K28.5
K28.3
K28.5
K28.0
K28.0
K28.0
K28.5
K28.0
datain[0]
K28.5
K28.3
K28.5
K28.0
K28.0
K28.0
K28.5
K28.0
rx_rmfifodatadeleted
GIGE Mode
IEEE 802.3 defines the 1000 Base-X PHY as an intermediate, or transition, layer that
interfaces various physical media with the media access control (MAC) in a gigabit
ethernet system. It shields the MAC layer from the specific nature of the underlying
medium. The 1000 Base-X PHY is divided into three sub-layers:
■ Physical coding sublayer
■ Physical media attachment
■ Physical medium dependent (PMD)
The PCS sublayer interfaces with the MAC through the gigabit medium independent
interface (GMII). The 1000 Base-X PHY defines a physical interface data rate of
1 Gbps.
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 3