PIC16F818-ESLASHML datasheet(40/176 Pages) MICROCHIP

номер детали	PIC16F818-E/ML

подробное описание детали	18/20-Pin Enhanced Flash Microcontrollers with nanoWatt Technology

PDF	176 Pages

Scroll/Zoom	100%

производитель	MICROCHIP [Microchip Technology]

домашняя страница	http://www.microchip.com

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40 / 176 page

PIC16F818/819

DS39598E-page 38

 2004 Microchip Technology Inc.

FIGURE 4-6:

PIC16F818/819 CLOCK DIAGRAM

OSCCON: OSCILLATOR CONTROL REGISTER (ADDRESS 8Fh)

PIC18F818/819

CONFIG (FOSC2:FOSC0)

OSC1

OSC2

Sleep

LP, XT, HS, RC, EC

CPU

Peripherals

8 MHz

4 MHz

2 MHz

1 MHz

500 kHz

125 kHz

250 kHz

OSCCON<6:4>

111

110

101

100

011

010

001

000

31.25 kHz

Source

Internal

Oscillator

Block

WDT

31.25 kHz

8 MHz

Internal Oscillator

(INTRC)

(INTOSC)

U-0

R/W-0

U-0

R-0

U-0

—

IRCF2

IRCF1

IRCF0

—IOFS

—

bit 7

bit 0

bit 7

Unimplemented: Read as ‘0’

bit 6-4

IRCF2:IRCF0: Internal Oscillator Frequency Select bits

111

= 8 MHz (8 MHz source drives clock directly)

110

= 4 MHz

101

= 2 MHz

100

= 1 MHz

011

= 500 kHz

010

= 250 kHz

001

= 125 kHz

000

= 31.25 kHz (INTRC source drives clock directly)

bit 3

Unimplemented: Read as ‘0’

bit 2

IOFS: INTOSC Frequency Stable bit

= Frequency is stable

= Frequency is not stable

bit 1-0

Unimplemented: Read as ‘0’

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

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