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PIC12F1822-I/MF Datasheet(PDF) 65 Page - Microchip Technology

No. de pieza PIC12F1822-I/MF
Descripción Electrónicos  8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
PDF  398 Pages
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC12F1822-I/MF Datasheet(HTML) 65 Page - Microchip Technology

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 2010 Microchip Technology Inc.
Preliminary
DS41413A-page 65
PIC12F/LF1822/16F/LF1823
5.4.2
TWO-SPEED START-UP
SEQUENCE
1.
Wake-up from Power-on Reset or Sleep.
2.
Instructions begin execution by the internal
oscillator at the frequency set in the IRCF<3:0>
bits of the OSCCON register.
3.
OST enabled to count 1024 clock cycles.
4.
OST timed out, wait for falling edge of the
internal oscillator.
5.
OSTS is set.
6.
System clock held low until the next falling edge
of new clock (LP, XT or HS mode).
7.
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
register will confirm if the microcontroller is running
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
0
1
1022 1023
PC + 1
TOST
T
INTOSC
OSC1
OSC2
Program Counter
System Clock
PC - N
PC



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