PIC16F688

Manufacturer Part NumberPIC16F688
ManufacturerMicrochip Technology Inc.
PIC16F688 datasheet
 
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Page 32/202:

CHECKING TWO-SPEED CLOCK STATUS

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PIC16F688
3.7.3
CHECKING TWO-SPEED CLOCK
STATUS
Checking the state of the OSTS bit of the OSCCON
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 register
(CONFIG), or the internal oscillator.
FIGURE 3-7:
TWO-SPEED START-UP
HFINTOSC
T
T
OST
OSC1
1022 1023
0
1
OSC2
PC - N
Program Counter
System Clock
DS41203D-page 30
PC + 1
PC
© 2007 Microchip Technology Inc.