USB/Ethernet-PLL Clock Control Register
| UCEN0 | USB0 clock output enable bit |
| UCSEL0 | USB0 clock selection bit |
| UCSEL1 | USB1 clock selection bit |
| UCEN1 | USB1 clock output enable bit |
| ECEN | Ethernet clock output enable bit |
| ECSEL0 | Ethernet clock selection bit 0 |
| ECSEL1 | Ethernet clock selection bit 1 |