27.3.4.1 Register Read
To execute a polled read, the steps are as follows:
- Write the ULPIREGADDR register with the address of the read access.
- Initiate a read access by setting the RDWR bit and the REGACC bit in the ULPIREGCTL register.
- Poll the REGCMPLT bit in the ULPIREGCTL register to determine when the access is complete.
- Clear the REGCMPLT bit and read the return data from the ULPIREGDATA register.