CCP/ECCP Capture Mode Prescaler

The prescaler can delay reaction to an event on the CCPx pin. The capture of the Timer1 value can be delayed to capture on the 1st edge (falling or rising), the 4th edge (rising only), or the 16th edge (rising only). These three prescaler settings are determined by the CCPxM<3:0> bits of the CCPxCON register.

Prescaler divide by 1
Capture mode: every falling edge (CCPxM<3:0> = 0100)
Capture mode: every rising edge (CCPxM<3:0> = 0101)

Prescaler divide by 4
Capture mode: every 4th rising edge (CCPxM<3:0> = 0110)

Prescaler divide by 16
Capture mode: every 16th rising edge (CCPxM<3:0> = 0111)


Whenever the CCP module is turned off, or the CCP module is not in Capture mode, the prescaler counter is cleared. Any Reset will also clear the prescaler counter.

Switching from one capture prescaler to another does not clear the prescaler and may generate a false interrupt. To avoid this unexpected operation, turn the module off by clearing the CCPxCON register before changing the prescaler.

© 2017 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contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates.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.