SLLA656 November 2024 TUSB1021-Q1 , TUSB521-Q1
For the TUSB1021-Q1, the same means of selecting which EQ settings to use still applies, with differences being in how much loss to expect per inch at 10Gbps with USB3.1 Gen 2 in Table 3-3, and how much loss the TUSB1021-Q1 can compensate for with the EQ settings in Table 3-2.
| FR4 PCB Trace Length (Inches) | Loss at 5GHz (dB) |
|---|---|
| 1 | 0.9 |
| 2 | 1.7 |
| 3 | 2.6 |
| 4 | 3.5 |
| 5 | 4.3 |
| 6 | 5.2 |
| 7 | 6.1 |
| 8 | 7 |
| 9 | 7.8 |
| 10 | 8.7 |
| 11 | 9.6 |
| 12 | 10.4 |
| 13 | 11.3 |
| 14 | 12.2 |
| EQUALIZATION SETTING # | RX1 and RX2 PORTS | SSTX PORT | ||||
|---|---|---|---|---|---|---|
| EQ1 PIN LEVEL | EQ0 PIN LEVEL | EQ GAIN AT 5GHz (dB) | SSEQ1 PIN LEVEL | SSEQ0 PIN LEVEL | EQ GAIN AT 5GHz (dB) | |
| 0 | 0 | 0 | 0.4 | 0 | 0 | –2.4 |
| 1 | 0 | R | 2.6 | 0 | R | –0.2 |
| 2 | 0 | F | 4.2 | 0 | F | 1.3 |
| 3 | 0 | 1 | 5.7 | 0 | 1 | 2.8 |
| 4 | R | 0 | 6.7 | R | 0 | 3.8 |
| 5 | R | R | 7.9 | R | R | 4.9 |
| 6 | R | F | 8.7 | R | F | 5.8 |
| 7 | R | 1 | 9.5 | R | 1 | 6.6 |
| 8 | F | 0 | 10.2 | F | 0 | 7.3 |
| 9 | F | R | 10.9 | F | R | 7.9 |
| 10 | F | F | 11.4 | F | F | 8.4 |
| 11 | F | 1 | 11.9 | F | 1 | 8.9 |
| 12 | 1 | 0 | 12.2 | 1 | 0 | 9.3 |
| 13 | 1 | R | 12.6 | 1 | R | 9.7 |
| 14 | 1 | F | 12.9 | 1 | F | 10.0 |
| 15 | 1 | 1 | 13.3 | 1 | 1 | 10.5 |