Altera Low Latency Ethernet 10G MAC - Manual (Page 31)

Table 3-2: Register Field and Link Status
Bit 0 Register Field Bit 1 Register Field Link Status TX XGMII Interface Behavior
Don't care Don't care No link fault Continue to allow normal packet transmission.
0 Don't care Local fault Immediately override the current content with
remote fault sequence.
1 0 Local fault Continue to send packet if there is one.
Otherwise, override the IPG/IDLE bytes with
remote fault sequence. (1)
1 1 Local fault Continue to allow normal packet transmission
(similar to no link fault).
0 Don't care Remote fault Immediately override the current content with
IDLE control characters.
1 Don't care Remote fault Continue to allow normal packet transmission
(similar to no link fault).
TX Timing Diagrams
Figure 3-7: Normal Frame
The following diagram shows the transmission of a normal frame.
tx_312_5_clk
avalon_st_tx_startofpacket
avalon_st_tx_valid
avalon_st_tx_ready
avalon_st_tx_endofpacket
avalon_st_tx_error
avalon_st_tx_empty[1:0]
avalon_st_tx_data[31:0]
xgmii_tx_data[31:0]
xgmii_tx_control[3:0]
avalon_st_tx_data[31:24]
avalon_st_tx_data[23:16]
avalon_st_tx_data[15:8]
avalon_st_tx_data[7:0]
xgmii_tx_data[7:0]
xgmii_tx_data[15:8]
xgmii_tx_data[23:16]
xgmii_tx_data[31:24]
0 3 0
0f8e_8236 0023_4567 *5 *1 *2 *2 *5 *b *c *7 *e *d *5 *3 *e *5 *0 cc6b_d355
0707_0707 *b *5 *0 *9 *1 *0 *c *e *b *6 *1 *0 *b *7 *6 *d *d *d *2 0707_0707
f 1 0 e f
0f 00 89 f1 00 fc ce 6b 26 01 e0 0b 87 a6 7d 4d 5d cc
8e 23 ab c7 2f 8c 3f 9f d9 77 59 71 e5 3a 42 00 6b
82 45 c4 e9 fb 00 62 f7 80 84 09 c5 21 65 4b b1 00 d3
36 67 d5 61 d2 82 85 4b fc 67 9e 9d 45 23 ee a5 00 55
07 7d fb 55 00 89 f1 00 fc ce 6b 26 01 e0 0b 87 a6 07
07 3a 55 23 ab c7 2f 8c 3f 9f d9 77 71 e5 07
07 4b 55 45 c4 e9 fb 00 62 f7 80 84 09 c5 21 65 07
07 ee 55 d5 67 d5 61 d2 82 85 4b fc 67 9e 8d 45 23 07
a2 4d 5d
fd 42 13
b1 8a
a5 d0 59
(1) At least a full column of IDLE (four IDLE characters) must precede the remote fault sequence.
UG-01144
2014.12.15
TX Timing Diagrams 3-9
Functional Description of LL Ethernet 10G MAC Altera Corporation
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