INTEDG datasheet(306/478 Pages) MICROCHIP

部件名	INTEDG

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

PDF	478 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

标志

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 数据表(PDF) 306 Page - Microchip Technology

INTEDG 数据表(HTML) 306 Page - Microchip Technology

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