Xilinx LOGICORE UG144 - Manual (Page 46)

46 www.xilinx.com 1-Gigabit Ethernet MAC v8.5 User Guide
UG144 April 24, 2009
Chapter 5: Using the Client Side Data Path R
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Table 5-3 provides conversion information against previous versions of the GEMAC.
20 Out of Bounds Asserted if the previous frame exceeded the
specified IEEE802.3-2005 maximum legal
length (see
“Maximum Permitted Frame
Length” ). This is only valid if jumbo frames
are disabled.
19 Control Frame Asserted if the previous frame contained the
special control frame identifier in the
length/type field.
18:5 Frame Length The length of the previous frame in number of
bytes. The count will stick at 16,383 for any
jumbo frames larger than this value.
4 Multicast Frame Asserted if the previous frame contained a
multicast address in the destination address
field.
3 Broadcast Frame Asserted if the previous frame contained the
broadcast address in the destination address
field.
2 FCS Error Asserted if the previous frame received had an
incorrect FCS value or the MAC detected error
codes during frame reception.
1 Bad Frame Asserted if the previous frame received
contained errors.
0 Good Frame Asserted if the previous frame received was
error-free.
Table 5-3: Rx Statistics conversion to previous core GEMAC core versions
Version 8.5
rx_statistics_vector
bit(s)
Version 8.4 (and earlier)
rx_statistics_vector
bit(s)
Notes
27 26 Bit 27 is equivalent to bit 26
of all previous core
versions.
26 N/A Bit 26 (reserved) has been
inserted into version 8.5 for
statistic vector
compatibility with the Tri-
Mode Ethernet MAC
LogiCORE™.
25:0 25:0 No differences
Table 5-2: Bit Definition for the Receiver Statistics Vector
rx_statistics_vector
bit(s)
Name Description