The T0CS bits are used to select the clock source for Timer0. The possible clock sources are listed in the table below.
| T0CS | Clock Source |
|---|---|
| 111 | Reserved |
| 110 | Reserved |
| 101 | SOSC |
| 100 | LFINTOSC |
| 011 | HFINTOSC |
| 010 | Fosc/4 |
| 001 | Pin selected by T0CKIPPS (Inverted) |
| 000 | Pin selected by T0CKIPPS (Non-inverted) |