A particular apparatus includes a coder/decoder (CODEC) including a first processor and a first buffer. The first processor is configured to analyze audio data samples to detect a keyword. The CODEC is configured to store a set of audio data samples at the first buffer. The apparatus also includes an application processor configured to receive the set of audio data samples from the CODEC via a bus and configured to initialize a speech recognition engine (SRE) based on the set of audio data samples. The application processor is configured to initialize the bus based on an indication from the CODEC that the keyword is detected.