USBPHYC tuning control register
| INCURREN | Controls the current boosting function |
| INCURRINT | Controls PHY current boosting |
| LFSCAPEN | : Enables the Low Full Speed feedback capacitor |
| HSDRVSLEW | Controls the HS driver slew rate |
| HSDRVDCCUR | Decreases the HS driver DC level |
| HSDRVDCLEV | Increases the HS Driver DC level. Not applicable during the HS Test J and Test K data transfer |
| HSDRVCURINCR | Enable the HS driver current increase feature |
| FSDRVRFADJ | Tuning pin to adjust the full speed rise/fall time |
| HSDRVRFRED | High Speed rise-fall reduction enable |
| HSDRVCHKITRM | HS Driver current trimming pins for choke compensation |
| HSDRVCHKZTRM | Controls the PHY bus HS driver impedance tuning for choke compensation |
| SQLCHCTL | Adjust the squelch DC threshold value |
| HDRXGNEQEN | Enables the HS Rx Gain Equalizer |
| STAGSEL | HS Tx staggering enable |
| HSFALLPREEM | HS Fall time control of single ended signals during pre-emphasis |
| HSRXOFF | : HS Receiver Offset adjustment |
| SHTCCTCTLPROT | Enables the short circuit protection circuitry in LS/FS driver |
| SQLBYP | This pin is used to bypass the squelch inter-locking circuitry |