Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...
Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...
Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...
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R<br />
CLIENTE<strong>MAC</strong>#RXCLIENTCLKIN<br />
E<strong>MAC</strong>#CLIENTRXD[7:0]<br />
E<strong>MAC</strong>#CLIENTRXDVLD<br />
E<strong>MAC</strong>#CLIENTRXDVLDMSW<br />
E<strong>MAC</strong>#CLIENTRXGOODFRAME<br />
E<strong>MAC</strong>#CLIENTRXSTATSBYTEVLD<br />
E<strong>MAC</strong>#CLIENTRXSTATSVLD<br />
E<strong>MAC</strong>#CLIENTRXSTATS[6:0]<br />
Statistics Vectors<br />
All bit-fields for E<strong>MAC</strong>#CLIENTRXSTATS[6:0] are valid only when<br />
E<strong>MAC</strong>#CLIENTRXSTATSVLD is asserted as illustrated in Figure 3-36.<br />
E<strong>MAC</strong>#CLIENTRXSTATSBYTEVLD is asserted if an <strong>Ethernet</strong> <strong>MAC</strong> frame byte (DA to FCS<br />
inclusive) is received. This is valid on every CLIENTE<strong>MAC</strong>#RXCLIENTCLKIN cycle.<br />
DA SA L/T DATA<br />
Figure 3-36: Receiver Statistics Vector Timing<br />
Table 3-4: Bit Definitions for the Receiver Statistics Vector<br />
RX_STATISTICS_VECTOR Name Description<br />
[6:0] [26:21]<br />
<strong>UG194</strong>_3_36_072106<br />
26 ALIGNMENT_ERROR Used in 10/100 MII mode. Asserted if the previous frame<br />
received has an incorrect FCS value and a misalignment<br />
occurs when the 4-bit MII data bus is converted to the 8-bit<br />
GMII data bus.<br />
25 Length/Type Out of Range Asserted if the LT field contains a length value that does<br />
not match the number of <strong>Ethernet</strong> <strong>MAC</strong> client data bytes<br />
received. Also asserted High if the LT field indicates that<br />
the frame contains padding but the number of <strong>Ethernet</strong><br />
<strong>MAC</strong> client data bytes received is not equal to 64 bytes<br />
(minimum frame size).<br />
'This bit is not defined when LT field error-checks are<br />
disabled.<br />
24 BAD_OPCODE Asserted if the previous frame is error free, contains the<br />
special control frame identifier in the LT field, but contains<br />
an OPCODE unsupported by the <strong>Ethernet</strong> <strong>MAC</strong> (any<br />
OPCODE other than PAUSE).<br />
TE<strong>MAC</strong> User Guide www.xilinx.com 83<br />
<strong>UG194</strong> (v1.10) February 14, 2011