| CPU | Central Processing Unit. Commonly used for the
microcontroller core. |
| ISR | Interrupt Service Routine |
| Signal strobe | Short pulse or signal |
| CCL LUT | Configurable Custom Logic Look-up Table. The AVR CCL
module contains LUTs. |
| Measurement window | The set of positions that the encoder shall
measure |
| Gray code | A way of encoding a digital signal where only one bit in
the signal value changes between two values in the signal
sequence |
| Event | Internal signal on the device that can be routed
directly between peripherals by the Event System |
| RTC | Real-Time Counter |
