Engine Knock Signal Processor Evaluation Board

The HIP9011EVAL1Z evaluation board is used to evaluate the HIP9011 engine knock signal processor. The HIP9011 is used to provide a method of detecting premature detonation often referred to as Knock or Ping in internal combustion engines.

The HIP9011 can switch between two sensors, if needed, for accurate monitoring or use with V-type engines. Its internal control via the SPI bus is fast enough to alternate sensors between each firing cycle. A programmable bandpass filter processes signals from either sensor input, allowing optimization for extracting engine knock or ping signals from background noise. Further signal processing is achieved through full-wave rectification of the filtered signal, which is then applied to an integrator. The integrator's output voltage level is proportional to the knock signal amplitude. The chip operates under microprocessor control via an SPI interface bus.