INTEDG datasheet(306/478 Pages) MICROCHIP

부품명	INTEDG

상세설명	64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

PDF	478 Pages

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제조업체	MICROCHIP [Microchip Technology]

홈페이지	http://www.microchip.com

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306 / 478 page

PIC16(L)F1946/47

DS41414D-page 306

 2010-2012 Microchip Technology Inc.

25.2

Clock Accuracy with

Asynchronous Operation

The factory calibrates the internal oscillator block

output

(HFINTOSC).

However,

the

HFINTOSC

frequency may drift as VDD or temperature changes,

and this directly affects the asynchronous baud rate.

Two methods may be used to adjust the baud rate

clock, but both require a reference clock source of

some kind.

The first (preferred) method uses the OSCTUNE

value in the OSCTUNE register allows for fine resolution

changes to the system clock source. See Section 5.2

“Clock Source Types”

for more information.

The other method adjusts the value in the Baud Rate

Generator. This can be done automatically with the

Auto-Baud

Detect

feature

(see

Section 25.4.1

“Auto-Baud Detect”

). There may not be fine enough

resolution when adjusting the Baud Rate Generator to

compensate for a gradual change in the peripheral

clock frequency.

INTEDG 데이터시트(PDF) 306 Page - Microchip Technology