P18F27K42 64 32 External Oscillator Selection Oscillator not enabled Reset Oscillator Selection HFINTOSC with HFFRQ = 64 MHz and CDIV = 1:1 Clock out Enable bit CLKOUT function is disabled PRLOCKED One-Way Set Enable bit PRLOCK bit can be set and cleared repeatedly Clock Switch Enable bit Writing to NOSC and NDIV is allowed Fail-Safe Clock Monitor Enable bit Fail-Safe Clock Monitor disabled MCLR Enable bit If LVP = 0, MCLR pin is MCLR Power-up timer selection bits PWRT is disabled Multi-vector enable bit Interrupt contoller does not use vector table to prioritze interrupts IVTLOCK bit One-way set enable bit IVTLOCK bit can be cleared and set repeatedly Low Power BOR Enable bit ULPBOR disabled Brown-out Reset Enable bits Brown-out Reset disabled Brown-out Reset Voltage Selection bits Brown-out Reset Voltage (VBOR) set to 2.45V ZCD Disable bit ZCD disabled. ZCD can be enabled by setting the ZCDSEN bit of ZCDCON PPSLOCK bit One-Way Set Enable bit PPSLOCK bit can be set and cleared repeatedly (subject to the unlock sequence) Stack Full/Underflow Reset Enable bit Stack full/underflow will cause Reset Debugger Enable bit Background debugger disabled Extended Instruction Set Enable bit Extended Instruction Set and Indexed Addressing Mode disabled WDT Period selection bits Divider ratio 1:65536 WDT operating mode WDT Disabled: SWDTEN is ignored WDT Window Select bits window always open (100%): no software control WDT input clock selector Software Control Boot Block Size selection bits Boot Block size is 512 words Boot Block enable bit Boot block disabled Storage Area Flash enable bit SAF disabled Application Block write protection bit Application Block not write protected Configuration Register Write Protection bit Configuration registers (300000-30000Bh) not write-protected Boot Block Write Protection bit Boot Block (000000-0007FFh) not write-protected Data EEPROM Write Protection bit Data EEPROM not write-protected SAF Write protection bit SAF not Write Protected Low Voltage Programming Enable bit HV on MCLR/VPP must be used for programming PFM and Data EEPROM Code Protection bit PFM and Data EEPROM code protection disabled