Datasheet

PIC16C55X
DS40143E-page 84 Preliminary  1996-2013 Microchip Technology Inc.
FIGURE 10-8: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING
TABLE 10-3: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER REQUIREMENTS
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
30 TmcL MCLR
Pulse Width (low) 2000 — — ns -40 to +85C
31 Twdt Watchdog Timer Timeout Period
(No Prescaler)
7* 18 33* ms VDD = 5.0V, -40 to +85C
32 Tost Oscillation Start-up Timer Period — 1024
TOSC
——TOSC = OSC1 period
33 Tpwrt Power-up Timer Period 28* 72 132* ms V
DD = 5.0V, -40 to +85C
34 T
IOZ I/O hi-impedance from MCLR low — 2.0* s
* These parameters are characterized but not tested.
† Data in “Typ” column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance
only and are not tested.
VDD
MCLR
Internal
POR
PWRT
Timeout
OSC
Timeout
Internal
RESET
Watchdog
Timer
RESET
33
32
30
31
34
I/O Pins
34