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There are a total of 18 architecture bits in the PALCE20V8 macrocell; two are global bits that apply to all macrocells and 16 that apply locally, two bits per macrocell. The architecture bits determine whether the macrocell functions as a register or combinatorial with inverting or noninverting output. The output enable control can come from an external pin orinternally from a product term. The output can also be permanently enabled, functioning as a dedicated output or permanently disabled, functioning as a dedicated input. Feedback paths are select- able from either the input/output pin associated with the mac- rocell, the input/output pin associated with an adjacent pin, or from the macrocell register itself.