Altera Stratix II GX Embedded Gigabit Ethernet MAC/PHY - Manual (Page 12)

Stratix II GX Embedded Gigabit Ethernet MAC / PHY
User's Guide
Version 1.0 - October 2005
Force Xoff Frame Generation
at (clocks)
Integer
XOFF Pause Frame Generation. Set the time for
to generate a XOFF Frame with the Core
command pin xoff_gen. When set to 0, XOFF
Frame generation is disabled.
0
Force Xon Frame Generation
at (clocks)
Integer
XON Pause Frame Generation. Set the time for to
generate a XON Frame with the Core command
pin xon_gen. When set to 0, XON Frame
generation is disabled.
0
Table 4: MAC Configuration Options
Option Unit Description Default
MAC CONFIG: Transmit FIFO
Section Empty Threshold
Integer
Set the Transmit FIFO Section empty threshold
to any value between 0 and 63 (Maximum
memory depth).
16
MAC CONFIG: Transmit FIFO
Section Full Threshold
Integer
Set the Transmit FIFO Section full threshold to
any value between 0 and 63 (Maximum memory
depth).
16
MAC CONFIG: Receive FIFO
Section Empty Threshold
Integer
Set the Receive FIFO Section empty threshold
to any value between 0 and 63 (Maximum
memory depth).
0
MAC CONFIG: Receive FIFO
Section Full Threshold
Integer
Set the Receive FIFO Section full threshold to
any value between 0 and 63 (Maximum memory
depth).
16
MAC CONFIG: Enable Auto-
Negotiation
Boolean
Enable Auto-Negotiation. When selected, the
Core performs auto-negotiation to check the link
with the Link Partner before simulation starts.
After simulation, the Auto-Negotiation is
restarted with the Core signal an_enable set to
'0'. When disabled, non Auto-Negotiation is
performed.
True
MAC CONFIG: Ignore Pause
Frames
Boolean
Ignore Pause Frames. When enabled, received
Pause Frames are ignored, when disable,
Pause Frames are decoded.
False
MAC CONFIG: Remove
Frame Padding
Boolean
Enable Receive Padding Remove. When
enabled, Frames are provided on the Client
Interface without padding, when disabled,
Frames are provided on the Client Interface with
padding.
True
MAC CONFIG: Forward CRC Boolean
Enable CRC Forwarding. When selected, CRC
is passed transparently from the Transmit Client
Interface to line and, is preserved on the
Received Client Interface.
False
MAC CONFIG: Transmit IPG
Length
Integer
Transmit Inter-Packet Gap. Defined, in Bytes,
the IPG between transmitted Frames.
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