Synchronous Modulo-6 Counter

The counter advances only when i_en='1'. After state 5, it returns to 0. o_tick is '1' during the cycle where the counter is at 5 and i_en='1', allowing another counter to be chained.

Behaviour

• synchronous active-high reset;
• hold value when i_en='0';
• sequence: 0, 1, 2, 3, 4, 5, 0.