Purpose: Timer/counter architecture and modes.

Timers 0 and 2 are 8-bit; timers 1, 3, 4, 5 are 16-bit. The latter have A/B/C compare channels and capture support.

#include <atmega2560/Timer.h>
 
namespace mcu = atmega2560;
 
static_assert(mcu::timer::timer_count == 6, "ATmega2560 Timer definition");

Timer groups

Timer	Width	Compare channels	Capture
0	8	2	No
1	16	3	Yes
2	8	2	No; asynchronous operation possible
3	16	3	Yes
4	16	3	Yes
5	16	3	Yes

The timer0…timer5 namespaces expose metadata, while timer clock and waveform mode enums describe register encodings.

These are hardware definitions, not runtime register access or initialization.