Zero-Cross Detect (ZCD) Disable

The input bit always returns 0 , never 1. The signal is pulled to ground and can't be detected anymore (can't measure the high of the input). When the pin is configured as input, the device has about 0.7 V at the pin. Pulling the input to GND, still shows the voltage remains around 0.7 V.

The Zero-Cross Detect (ZCD) module can be permanently enabled upon power-up by clearing the ZCD Disable bit ZCDDIS/ZCD in the Configuration Word. Clearing this bit ensures that ZCDxIN is kept at a regulated and safe voltage as soon as the device is powered on. Therefore, ZCDxIN cannot be multiplexed with any other functionality. However, when ZCDDIS/ZCD is set, the ZCD can be enabled or disabled during firmware runtime by setting or clearing the Zero-Cross Enable ZCDxEN bit, respectively.

  Return to Top

© 2024 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.