PIC16F1526 datasheet(61/354 Pages) MICROCHIP

Numer części	PIC16F1526

Szczegółowy opis	64-Pin Flash Microcontrollers with nanoWatt XLP Technology

PDF	354 Pages

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Producent	MICROCHIP [Microchip Technology]

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Preliminary

DS41458A-page 61

PIC16(L)F1526/27

5.4.2

TWO-SPEED START-UP

SEQUENCE

Wake-up from Power-on Reset or Sleep.

Instructions begin execution by the internal

oscillator at the frequency set in the IRCF<3:0>

bits of the OSCCON register.

OST enabled to count 1024 clock cycles.

OST timed out, wait for falling edge of the

internal oscillator.

OSTS is set.

System clock held low until the next falling edge

of new clock (LP, XT or HS mode).

System clock is switched to external clock

source.

5.4.3

CHECKING TWO-SPEED CLOCK

STATUS

Checking the state of the OSTS bit of the OSCSTAT

from the external clock source, as defined by the

FOSC<2:0> bits in the Configuration Word 1, or the

internal oscillator.

FIGURE 5-8:

TWO-SPEED START-UP

1022 1023

PC + 1

TOST

INTOSC

OSC1

OSC2

Program Counter

System Clock

PC - N

PIC16F1526 Arkusz danych(PDF) 61 Page - Microchip Technology