PIC16F84A 18-pin Enhanced Flash/EEPROM 8-Bit MCU Data Sheet

PIC16F84AFIGURE 6-9:TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): FAST VDD RISE TIMEVDDMCLRINTERNAL PORTPWRTPWRT TIME-OUTTOSTOST TIME-OUTINTERNAL RESETFIGURE 6-10:TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): SLOW VDD RISE TIMEV1VDDMCLRINTERNAL PORTPWRTPWRT TIME-OUTTOSTOST TIME-OUTINTERNAL RESETWhen VDD rises very slowly, it is possible that the TPWRT time-out and TOST time-out will expire before VDDhas reached its final value. In this example, the chip will reset properly if, and only if, V1 ≥ VDD min.© 1998 Microchip Technology Inc. Preliminary DS35007A-page 27