PIC18LF010T-I データシートの表示（PDF） - Microchip Technology

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PIC18LF010T-I

High Performance Microcontrollers

Microchip Technology 

PIC18F010/020

2.5 External Clock Input

The EC oscillator mode requires an external clock

source to be connected to the OSC1 pin. The feedback

device between OSC1 and OSC2 is turned off in this

mode to save current. There is no oscillator start-up

time required after a Power-on Reset or after a recov-

ery from SLEEP mode.

In the EC oscillator mode, the oscillator frequency

divided by 4 is available on the OSC2 pin. This signal

may be used for test purposes or to synchronize other

logic. Figure 2-4 shows the pin connections for the EC

oscillator mode.

FIGURE 2-4:

EXTERNAL CLOCK INPUT

OPERATION (EC OSC

CONFIGURATION)

Clock from

ext. system

FOSC/4

OSC1

PIC18F010/020

OSC2

FIGURE 2-5:

PIC18F010/020 OSCILLATOR CONFIGURATION

32kHz

Internal

OSC

500kHz

Internal

OSC

8MHz

Internal

OSC

Divider

8

2

1

Analog

Summation

+

OSCCAL OSCTUNE

OSCOUT

MUX

OSCIN

Ext Osc

and

Crystal

Osc

External Clock In

IRCF Speed Selects

Configuration bits

SYSCLK

 2001 Microchip Technology Inc.

Preliminary

DS41142A-page 9

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