PIC17C44-08SLASHP datasheet(157/240 Pages) MICROCHIP

157 / 240 page

DS30412C-page 157

PIC17C4X

Applicable Devices 42 R42 42A 43 R43 44

FIGURE 17-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP

TIMER TIMING

TABLE 17-4:

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)

100 *

—

Twdt

Watchdog Timer Time-out Period

(Prescale = 1)

5 *

25 *

Tost

Oscillation Start-up Timer Period

1024 TOSC §ms

TOSC = OSC1 period

Tpwrt

Power-up Timer Period

40 *

200 *

TmcL2adI MCLR to System Interface bus

(AD15:AD0) invalid

—

100 *

These parameters are characterized but not tested.

†

Data in “Typ” column is at 5V, 25˚C unless otherwise stated. These parameters are for design guidance only and are not

tested.

‡

These parameters are for design guidance only and are not tested, nor characterized.

This speciﬁcation ensured by design.

VDD

MCLR

Internal

POR

PWRT

Time-out

OSC

Time-out

Internal

RESET

Watchdog

Timer

RESET

Address /

Data

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