25G Signaling - 1.3 English

25G operation can use either a 64/128-bit data bus depending on the clock mode that is in use. Up to four 25G clients can be active.

Table 1. 25G Non-Segmented Signaling for 64 Bits
Client	Direction	Function	Signaling
0	RX	valid last data[63:0] tkeep err preempt resume preamble_out	rx_axis_tvalid_0 rx_axis_tlast_0 rx_axis_tdata0[63:0] rx_axis_tkeep_user_0[7:0] rx_axis_tkeep_user_0[8] rx_axis_tkeep_user_0[9] rx_axis_tkeep_user_0[10] rx_preambleout_0[55:0]
0	TX	ready valid last data[63:0] tkeep err preempt resume preamble_in	tx_axis_tready_0 tx_axis_tvalid_0 tx_axis_tlast_0 tx_axis_tdata0[63:0] tx_axis_tkeep_user_0[7:0] tx_axis_tkeep_user_0[8] tx_axis_tkeep_user_0[9] tx_axis_tkeep_user_0[10] tx_axis_preamblein_0[55:0]
1	RX	valid last data[63:0] tkeep err preempt resume preamble_out	rx_axis_tvalid_1 rx_axis_tlast_1 rx_axis_tdata2[63:0] rx_axis_tkeep_user_2[7:0] rx_axis_tkeep_user_2[8] rx_axis_tkeep_user_2[9] rx_axis_tkeep_user_2[10] rx_preambleout_1[55:0]
1	TX	ready valid last data[63:0] tkeep err preempt resume preamble_in	tx_axis_tready_1 tx_axis_tvalid_1 tx_axis_tlast_1 tx_axis_tdata2[63:0] tx_axis_tkeep_user_2[7:0] tx_axis_tkeep_user_2[8] tx_axis_tkeep_user_2[9] tx_axis_tkeep_user_2[10] tx_axis_preamblein_1[55:0]
2	RX	valid last data[63:0] tkeep err preempt resume preamble_out	rx_axis_tvalid_2 rx_axis_tlast_2 rx_axis_tdata4[63:0] rx_axis_tkeep_user_4[7:0] rx_axis_tkeep_user_4[8] rx_axis_tkeep_user_4[9] rx_axis_tkeep_user_4[10] rx_preambleout_2[55:0]
2	TX	ready valid last data[63:0] tkeep err preempt resume preamble_in	tx_axis_tready_2 tx_axis_tvalid_2 tx_axis_tlast_2 tx_axis_tdata4[63:0] tx_axis_tkeep_user_4[7:0] tx_axis_tkeep_user_4[8] tx_axis_tkeep_user_4[9] tx_axis_tkeep_user_4[10] tx_axis_preamblein_2[55:0]
3	RX	valid last data[63:0] tkeep err preempt resume preamble_out	rx_axis_tvalid_3 rx_axis_tlast_3 rx_axis_tdata6[63:0] rx_axis_tkeep_user_6[7:0] rx_axis_tkeep_user_6[8] rx_axis_tkeep_user_6[9] rx_axis_tkeep_user_6[10] rx_preambleout_3[55:0]
3	TX	ready valid last data[63:0] tkeep err preempt resume preamble_in	tx_axis_tvalid_3 tx_axis_tlast_3 tx_axis_tready_3 tx_axis_tdata6[63:0] tx_axis_tkeep_user_6[7:0] tx_axis_tkeep_user_6[8] tx_axis_tkeep_user_6[9] tx_axis_tkeep_user_6[10] tx_axis_preamblein_3[55:0]

Table 2. 25G Non-Segmented Signaling for 128 Bits
Client	Direction	Function	Signaling
0	RX	valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_out	rx_axis_tvalid_0 rx_axis_tlast_0 rx_axis_tdata0[63:0] rx_axis_tdata1[63:0] rx_axis_tkeep_user_0[7:0] rx_axis_tkeep_user_1[7:0] rx_axis_tkeep_user_0[8] rx_axis_tkeep_user_0[9] rx_axis_tkeep_user_0[10] rx_preambleout_0[55:0]
0	TX	ready valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_in	tx_axis_tready_0 tx_axis_tvalid_0 tx_axis_tlast_0 tx_axis_tdata0[63:0] tx_axis_tdata1[63:0] tx_axis_tkeep_user_0[7:0] tx_axis_tkeep_user_1[7:0] tx_axis_tkeep_user_0[8] tx_axis_tkeep_user_0[9] tx_axis_tkeep_user_0[10] tx_axis_preamblein_0[55:0]
1	RX	valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_out	rx_axis_tvalid_1 rx_axis_tlast_1 rx_axis_tdata2[63:0] rx_axis_tdata3[63:0] rx_axis_tkeep_user_2[7:0] rx_axis_tkeep_user_3[7:0] rx_axis_tkeep_user_2[8] rx_axis_tkeep_user_2[9] rx_axis_tkeep_user_2[10] rx_preambleout_1[55:0]
1	TX	ready valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_in	tx_axis_tready_1 tx_axis_tvalid_1 tx_axis_tlast_1 tx_axis_tdata2[63:0] tx_axis_tdata3[63:0] tx_axis_tkeep_user_2[7:0] tx_axis_tkeep_user_3[7:0] tx_axis_tkeep_user_2[8] tx_axis_tkeep_user_2[9] tx_axis_tkeep_user_2[10] tx_axis_preamblein_1[55:0]
2	RX	valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_out	rx_axis_tvalid_2 rx_axis_tlast_2 rx_axis_tdata4[63:0] rx_axis_tdata5[63:0] rx_axis_tkeep_user_4[7:0] rx_axis_tkeep_user_5[7:0] rx_axis_tkeep_user_4[8] rx_axis_tkeep_user_4[9] rx_axis_tkeep_user_4[10] rx_preambleout_2[55:0]
2	TX	ready valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_in	tx_axis_tready_2 tx_axis_tvalid_2 tx_axis_tlast_2 tx_axis_tdata4[63:0] tx_axis_tdata5[63:0] tx_axis_tkeep_user_4[7:0] tx_axis_tkeep_user_5[7:0] tx_axis_tkeep_user_4[8] tx_axis_tkeep_user_4[9] tx_axis_tkeep_user_4[10] tx_axis_preamblein_2[55:0]
3	RX	valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_out	rx_axis_tvalid_3 rx_axis_tlast_3 rx_axis_tdata6[63:0] rx_axis_tdata7[63:0] rx_axis_tkeep_user_6[7:0] rx_axis_tkeep_user_7[7:0] rx_axis_tkeep_user_6[8] rx_axis_tkeep_user_6[9] rx_axis_tkeep_user_6[10] rx_preambleout_3[55:0]
3	TX	ready valid last data[63:0] data[127:64] tkeep[7:0] tkeep[15:8] err preempt resume preamble_in	tx_axis_tvalid_3 tx_axis_tlast_3 tx_axis_tlast_3 tx_axis_tdata6[63:0] tx_axis_tdata7[63:0] tx_axis_tkeep_user_6[7:0] tx_axis_tkeep_user_7[7:0] tx_axis_tkeep_user_6[8] tx_axis_tkeep_user_6[9] tx_axis_tkeep_user_6[10] tx_axis_preamblein_3[55:0]