Address Filter; Receiver Statistics Vector; Figure 5-5: Receiver Statistics Vector Timing - Xilinx LogiCORE IP MAC v8.5 User Manual

R

Address Filter

If the optional Address Filter is included in the core, the MAC is able to reject frames that
do not contain a known address in their destination address field. If a frame is rejected, the
rx_data_valid signal is not asserted for the duration of the frame. In addition, neither
rx_good_frame or rx_bad_frame are asserted at the end of the frame. The statistics
vectors are still output with a valid pulse at the end of the rejected frame.
If the Address Filter is not in promiscuous mode, it will reject frames in which the
destination address does not meet any of the following criteria:
•
•
•
•
•

Receiver Statistics Vector

The statistics for the frame received are contained within the rx_statistics_vector.
The vector is driven synchronously by the receiver clock, gmii_rx_clk, following frame
reception. The bit field definition for the vector is defined in
All bit fields, with the exception of byte valid, are valid only when the
rx_statistics_valid is asserted. This is illustrated in
significant on every gmii_rx_clk cycle.
44
-- DISCONTINUED PRODUCT --
It is equal to the broadcast address defined in the IEEE 802.3-2005 specification.
It is equal to the pause multicast address defined in the IEEE 802.3-2005 specification.
The destination address field contains the pause frame MAC source address specified
in the Receiver Configuration Word 0 and Word 1.
It is equal to the MAC unicast address. When the optional Management Interface is
present, this is found in the unicast address configuration registers
Table 8-9, page 82). If the Management Interface is not present the unicast address is
input on the mac_unicast_address input.
It matches any of the addresses stored in the MAC address table. The address table is
only present when the MAC contains the optional Management Interface and the core
was built with one or more address table entries.
Caution!
The statistic vectors in this release have been made compatible with the Tri-Mode
Ethernet MAC core. They are not backwards compatible with previous versions of the 1-Gigabit
Ethernet MAC core (see Table 5-3
gmii_rx_clk
rx_statistics_valid
rx_statistics_vector[27:0]

Figure 5-5: Receiver Statistics Vector Timing

www.xilinx.com
Chapter 5: Using the Client Side Data Path
Table
Figure
for Receiver Statistic Vector conversion details)
1-Gigabit Ethernet MAC v8.5 User Guide
(Table 8-8 and
5-2.
5-5. Byte valid is
UG144 April 24, 2009