PIC16F18344-ISLASHP datasheet(72/489 Pages) MICROCHIP

72 / 489 page

PIC16(L)F18324/18344

DS40001800C-page 72

 2015-2017 Microchip Technology Inc.

6.10

Start-up Sequence

Upon the release of a POR or BOR, the following must

occur before the device will begin executing:

Power-up Timer runs to completion (if enabled).

MCLR must be released (if enabled).

Oscillator start-up timer runs to completion (if

required for oscillator source).

The total time-out will vary based on oscillator

configuration and Power-up Timer Configuration. See

Section 7.0

“Oscillator

Module”

for

information.

The Power-up Timer and oscillator start-up timer run

independently of MCLR Reset. If MCLR is kept low

long enough, the Power-up Timer will expire. Upon

bringing MCLR high, the device will begin execution

after 10 FOSC cycles (see Figure 6-3). This is useful for

testing purposes or to synchronize more than one

device operating in parallel.

FIGURE 6-3:

RESET START-UP SEQUENCE

TOST

TMCLR

TPWRT

VDD

Internal POR

Power-up Timer

MCLR

Internal RESET

Oscillator Modes

Oscillator Start-up Timer

Oscillator

FOSC

Internal Oscillator

Oscillator

FOSC

External Clock (EC)

CLKIN

FOSC

External Crystal

PIC16F18344-I/P Datasheet(PDF) 72 Page - Microchip Technology

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