PIC17C752-08SLASHP datasheet(234/320 Pages) MICROCHIP

234 / 320 page

PIC17C75X

DS30264A-page 234

Preliminary

FIGURE 20-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,

AND BROWN-OUT RESET TIMING

TABLE 20-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,

AND BROWN-OUT RESET REQUIREMENTS

Param.

No.

Sym Characteristic

Min

Typ†

Max Units

Conditions

TmcL

MCLR Pulse Width (low)

100 *

—

VDD = 5V

TWDT

Watchdog Timer Time-out Period

(Prescale = 1)

5 *

25 *

VDD = 5V

TOST

Oscillation Start-up Timer Period

—

1024TOSC§

—

TOSC = OSC1 period

TPWRT

Power-up Timer Period

40 *

200 *

VDD = 5V

TIOZ

MCLR to I/O hi-impedance

100 ‡

—

Depends on pin load

TmcL2adI MCLR to System Inter-

face bus (AD15:AD0>)

invalid

PIC17

CXXX

—

100 *

PIC17

LCXXX

—

120 *

TBOR

Brown-out Reset Pulse Width (low)

100 *

—

3.8V

≤ VDD ≤ 4.2V

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 / BOR

PWRT

Timeout

OSC

Timeout

Internal

RESET

Watchdog

Timer

RESET

Address /

Data

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