37.15.15 PHY Control Register 50
Note: The USB PHY values must be loaded from the CAL OTP area into
the USB PHY registers by software, before enabling the USB, to achieve the specified
accuracy.
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | PHY50 |
| Offset: | 0x1550 |
| Reset: | 0x00000000 |
| Property: | PAC Write-Protection |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| COMPCURREF[2:0] | ASESSVALIDTUNE[2:0] | BSESSVALIDTUNE | |||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | ||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
Bits 7:5 – COMPCURREF[2:0] Compensation Current Tuning Reference
| Value | Description |
|---|---|
| 111 | 162.5 mV |
| 110 | 175 mV |
| 101 | 212.5 mV |
| 100 | 250 mV |
| 011 | 237.5 mV |
| 010 | 225 mV |
| 001 | 187.5 mV |
| 000 | 200 mV |
Bits 3:1 – ASESSVALIDTUNE[2:0] A Session Valid Reference Tune
| Value | Description |
|---|---|
| 111 | 1.2 V |
| 110 | 1.55 V |
| 101 | 1.5 V |
| 100 | 1.45 V |
| 011 | 1.25 V |
| 010 | 1.3 V |
| 001 | 1.35 V |
| 000 | 1.4 V (Default) |
Bit 0 – BSESSVALIDTUNE B Session Valid Reference Tune
Settings include the lower bits (PHY4C.6:7) and the upper bit (PHY50.0).
| Value | Description |
|---|---|
| 111 | 2.16 V |
| 110 | 2.58 V |
| 101 | 2.52 V |
| 100 | 2.46 V |
| 011 | 2.22 V |
| 010 | 2.28 V |
| 001 | 2.34 V |
| 000 | 2.4 V (Default) |