1.3 Cascade Logic

Cascade logic allows a macrocell (MC) to borrow from an adjacent MC. This feature is available on all macrocells except the corner macrocells (MC1, MC9, MC17 and MC25). It is particularly useful for designs that require large product-term fan-in, such as state machines or high-performance designs where speed is important. Each macrocell can borrow up to five product terms from an adjacent macrocell, and multiple macrocells can be cascaded to provide up to 40 product terms for a single macrocell.