PIC16LC554 datasheet(76/96 Pages) MICROCHIP

76 / 96 page

PIC16C55X(A)

DS40143B-page 76

Preliminary

FIGURE 10-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP

TIMER TIMING

TABLE 10-4:

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP

TIMER REQUIREMENTS

Parameter

No.

Sym

Characteristic

Min

Typ†

Max

Units

Conditions

TmcL

MCLR Pulse Width (low)

2000

—

-40

° to +85°C

Twdt

Watchdog Timer Time-out Period

(No Prescaler)

33*

VDD = 5.0V, -40

° to +85°C

Tost

Oscillation Start-up Timer Period

—

1024 TOSC

—

TOSC = OSC1 period

Tpwrt

Power-up Timer Period

28*

132*

VDD = 5.0V, -40

° to +85°C

TIOZ

I/O hi-impedance from MCLR low

—

2.0

µs

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

I/O Pins

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