| Bits | Default | Type | Signal |
|---|---|---|---|
| 0 | 1 | RW | ctl_tx_enable |
| 1 | 1 | RW | ctl_tx_fcs_ins_enable |
| 2 | 0 | RW | ctl_tx_ignore_fcs |
| 3 | 0 | RW | ctl_tx_send_lfi |
| 4 | 0 | RW | ctl_tx_send_rfi |
| 5 | 0 | RW | ctl_tx_send_idle |
| 6 | 0 | RW | ctl_tx_send_umii_lfi |
| 7 | 0 | RW | ctl_tx_send_umii_rfi |
| 15 | 0 | RW | ctl_tx_test_pattern_enable |
| 16 | 0 | RW | ctl_tx_test_pattern_select |
| 17 | 0 | RW | ctl_tx_data_pattern_select |
| 18 | 0 | RW | ctl_tx_custom_preamble_enable |