PIC16F720-ESLASHP datasheet(71/244 Pages) MICROCHIP

부품명	PIC16F720-E/P

상세설명	20-Pin Flash Microcontrollers with nanoWatt XLP Technology

PDF	244 Pages

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제조업체	MICROCHIP [Microchip Technology]

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 2010 Microchip Technology Inc.

DS41430A-page 71

PIC16F/LF720/721

7.6

External Clock Modes

7.6.1

EC MODE

The External Clock (EC) mode allows an externally

generated logic level as the system clock source. When

operating in this mode, an external clock source is

connected to the CLKOUT input and the CLKIN is

available for general purpose I/O. Figure 7-2 shows the

pin connections for EC mode.

FIGURE 7-2:

EXTERNAL CLOCK (EC)

MODE OPERATION

CLKIN

CLKOUT

I/O

Clock from

Ext. System

PIC® MCU

TABLE 7-1:

SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR, BOR

Value on

all other

Resets(1)

CONFIG1(1)

—

MCLRE

PWRTE

WDTEN

—FOSC1

FOSC0

—

OSCCON

—

IRCF1

IRCF0

ICSL

ICSS

—

--10 qq--

OSCTUNE

—

TUN5

TUN4

TUN3

TUN2

TUN1

TUN0

--00 0000

--uu uuuu

Legend:

= unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by oscillators.

Note

See Configuration Word 1 (Register 8-1) for operation of all bits.

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