13.5 CRC Interrupt
The CRC module will generate an interrupt when the BUSY bit transitions from
        ‘1’ to ‘0’. The CRC Interrupt Flag (CRCIF) bit of the
      corresponding PIR register will be set every time the BUSY bit transitions, whether or not the
      CRC Interrupt Enable (CRCIE) has been set. The CRCIF bit must be cleared by software by the
      user. If the user has the CRCIE bit set, then the CPU will jump to the Interrupt Service
      Routine (ISR) every time that the CRCIF bit is set. 
