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

PIC16F84ATABLE B-1:CONVERSION CONSIDERATIONS - PIC16C84, PIC16F83/F84, PIC16CR83/CR84,PIC16F84ADifference PIC16C84 PIC16F83/F84PIC16CR83/CR84PIC16F84APort OutputRise/Fall time(TioR, TioF). Seeparameters #20,20A, 21, and 21A inthe electrical spec’sfor more detail.TioR, TioF (max) =25ns (C84)TioR, TioF (max) =60ns (LC84)TioR, TioF (max) =35ns (C84)TioR, TioF (max) =70ns (LC84)TioR, TioF (max) =35ns (C84)TioR, TioF (max) =70ns (LC84)TioR, TioF (max) =35ns (C84)TioR, TioF (max) =70ns (LC84)MCLR on-chip filter.See parameter#30 in the electricalspec’s for moredetail.No Yes Yes YesPORTA and crystaloscillator valuesless than 500kHzFor crystal oscillatorconfigurationsoperating below500kHz, the devicemay generate a spuriousinternalQ-clock whenPORTA switchesstate.N/A N/A N/ARB0/INT pin TTL TTL/ST*(* Schmitt Trigger)TTL/ST*(* Schmitt Trigger)TTL/ST*(* Schmitt Trigger)EEADR andIDDIt is recommendedthat theEEADR bitsbe cleared. Wheneither of these bits isset, the maximumIDD for the device ishigher than whenboth are cleared.N/A N/A N/AThe polarity of thePWRTE bitRecommendedvalue of REXT for RCoscillator circuitsPWRTE PWRTE PWRTE PWRTEREXT = 3kΩ - 100kΩ REXT = 5kΩ - 100kΩ REXT = 5kΩ - 100kΩ REXT = 3kΩ - 100kΩGIE bit unintentionalenableIf an interrupt occurswhile the GlobalInterrupt Enable(GIE) bit is beingcleared, the GIE bitmay unintentionallybe re-enabled by theuser’s Interrupt ServiceRoutine (theRETFIE instruction).N/A N/A N/APackages PDIP, SOIC PDIP, SOIC PDIP, SOIC PDIP, SOIC, SSOPDS35007A-page 60 Preliminary © 1998 Microchip Technology Inc.