PIC18F23K20-ESLASHSOSQTP datasheet(380/420 Pages) MICROCHIP

380 / 420 page

PIC18F2XK20/4XK20

DS41303B-page 378

Advance Information

FIGURE 26-7:

BROWN-OUT RESET TIMING

TABLE 26-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

AND BROWN-OUT RESET REQUIREMENTS

FIGURE 26-8:

TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS

Param.

No.

Symbol

Characteristic

Min

Typ

Max

Units

Conditions

TmcL

MCLR Pulse Width (low)

—

μs

TWDT

Watchdog Timer Time-out Period

(no postscaler)

—4.00

TBD

TOST

Oscillation Start-up Timer Period

1024 TOSC

—

1024 TOSC

—TOSC = OSC1 period

TPWRT

Power-up Timer Period

—

65.5

TBD

TIOZ

I/O High-Impedance from MCLR

Low or Watchdog Timer Reset

—2

—

μs

TBOR

Brown-out Reset Pulse Width

200

—

μsVDD ≤ BVDD (see D005)

TIVRST

Time for Internal Reference

Voltage to become Stable

—20

μs

THLVD

High/Low-Voltage Detect Pulse Width

200

—

μsVDD ≤ VHLVD

TCSD

CPU Start-up Time

—

μs

TIOBST

Time for INTOSC to Stabilize

—

Legend: TBD = To Be Determined

VDD

BVDD

VBGAP = 1.2V

VIRVST

Enable Internal

Internal Reference

Reference Voltage

Voltage Stable

Note:

Refer to Figure 26-3 for load conditions.

T0CKI

T1OSO/T13CKI

TMR0 or

TMR1

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