PIC16F84A_13 Datasheet, PDF (57/90 Pages) Microchip Technology – 18-pin Enhanced FLASH/EEPROM 8-Bit Microcontroller

PIC16F84A
FIGURE 9-8:
VDD
MCLR
Internal
POR
PWRT
Time-out
OSC
Time-out
Internal
Reset
Watchdog
Timer
Reset
I/O Pins
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING
30
33
32
31
34
34
TABLE 9-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER REQUIREMENTS
Parameter
No.
Sym
Characteristic
Min Typ† Max Units
Conditions
30
TmcL MCLR Pulse Width (low)
2
—
— s VDD = 5.0V
31
TWDT
Watchdog Timer Time-out
Period (No Prescaler)
7
18
33 ms VDD = 5.0V
32
TOST
Oscillation Start-up Timer
Period
1024TOSC
ms TOSC = OSC1 period
33
TPWRT Power-up Timer Period
28
72
132 ms VDD = 5.0V
34
TIOZ
I/O hi-impedance from MCLR
Low or RESET
—
—
100 ns
† Data in "Typ" column is at 5V, 25C, unless otherwise stated. These parameters are for design guidance
only and are not tested.
 2001-2013 Microchip Technology Inc.
DS35007C-page 57