Introduction

The Configurable Custom Logic (CCL) is a programmable logic peripheral that allows the on-chip creation of the logic functions for Microchip tinyAVR® 0- and 1-series, megaAVR® 0-series, and AVR^® DA devices. The CCL provides programmable, combinational and sequential logic that operates independently of the CPU execution. It can be connected to a wide range of internal and external inputs such as device pins, events, or other internal peripherals and can serve as a “glue logic” between the device peripherals and external devices.

This technical brief explains how to use the CCL to implement the following functions:

• Logic AND Gate:

  Uses CCL to implement a simple logic AND gate.

• State Decoder:

  Shows how to use CCL combinational logic to detect a specific state of the external signals.

• SR Latch:

  Uses internal CCL sequential logic to create an SR latch.