PIC16F767T-I/ML View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F767T-I/ML

28/40/44-Pin, 8-Bit CMOS Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC16F7X7

TABLE 4-4: CLOCK SWITCHING MODES

Current

System

Clock

SCS bits<1:0>

Modified to:

Delay

OSTS IOFS T1RUN

bit bit

bit

New

System

Clock

Comments

LP, XT, HS,

10

8 Clocks of 0

1(1)

T1OSC,

(INTRC)

INTRC

EC, RC FOSC<2:0> = LP,

XT or HS

0

INTRC The internal RC oscillator

or

frequency is dependant upon

INTOSC the IRCF bits.

or

INTOSC

Postscaler

LP, XT, HS,

01

8 Clocks of 0 N/A

1

INTRC,

(T1OSC)

T1OSC

EC, RC FOSC<2:0> = LP,

XT or HS

T1OSC T1OSCEN bit must be enabled.

INTRC

00

8 Clocks of 1 N/A

0

EC

T1OSC FOSC<2:0> = EC

EC

or

or

or

RC

FOSC<2:0> = RC

RC

INTRC

00

1024 Clocks 1 N/A

T1OSC FOSC<2:0> = LP,

+

XT, HS

8 Clocks of

LP, XT, HS

0 LP, XT, HS During the 1024 clocks,

program execution is clocked

from the secondary oscillator

until the primary oscillator

becomes stable.

LP, XT, HS

00

1024 Clocks 1 N/A

(Due to Reset)

LP, XT, HS

0 LP, XT, HS When a Reset occurs, there is

no clock transition sequence.

Instruction

execution and/or peripheral

operation is suspended unless

Two-Speed Start-up mode is

enabled, after which the INTRC

will act as the system clock

until the Oscillator Start-up

Timer has expired.

Note 1: If the new clock source is the INTOSC or INTOSC postscaler, then the IOFS bit will be set 4 ms (approx.)

after the clock change.

 2004 Microchip Technology Inc.

DS30498C-page 47

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