PIC16F18344-ISLASHSS datasheet(89/489 Pages) MICROCHIP

89 / 489 page

 2015-2017 Microchip Technology Inc.

DS40001800C-page 89

PIC16(L)F18324/18344

TABLE 7-1:

NOSC/COSC BIT SETTINGS

NOSC<2:0>

COSC<2:0>

Clock Source

111

EXTOSC(1)

110

HFINTOSC (1 MHz)

101

Reserved

100

LFINTOSC

011

SOSC

010

Reserved

001

EXTOSC with 4xPLL(1)

000

HFINTOSC with 2x PLL

(32 MHz)

Note 1:

EXTOSC configured by the FEXTOSC

bits of Configuration Word 1

(Register 5-1).

TABLE 7-2:

NDIV/CDIV BIT SETTINGS

NDIV<3:0>

CDIV<3:0>

Clock Divider

1111

–1010

Reserved

1001

512

1000

256

0111

128

0110

0101

0100

0011

0010

0001

0000

OSCCON3: OSCILLATOR CONTROL REGISTER 3

R/W/HC-0/0

R/W-0/0

R-0/0

U-0

CSWHOLD

SOSCPWR

SOSCBE

ORDY

NOSCR

—

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

u = Bit is unchanged

x = Bit is unknown

-n/n = Value at POR and BOR/Value at all other Resets

‘1’ = Bit is set

‘0’ = Bit is cleared

f = determined by fuse setting

q = Reset value is determined by hardware

HC = Hardware clear

bit 7

CSWHOLD:

Clock Switch Hold bit

= Clock switch will hold (with interrupt) when the oscillator selected by NOSC is ready

= Clock switch may proceed when the oscillator selected by NOSC is ready; if this bit

is set at the time that NOSCR becomes ‘1’, the switch and interrupt will occur.

bit 6

SOSCPWR:

Secondary Oscillator Power Mode Select bit

If SOSCBE = 0

= Secondary oscillator operating in High-Power mode

= Secondary oscillator operating in Low-Power mode

If SOSCBE = 1

= Bit is ignored

bit 5

SOSCBE:

Secondary Oscillator Bypass Enable bit

= Secondary oscillator SOSCI is configured as an external clock input (ST-buffer); SOSCO is not

used.

= Secondary oscillator is configured as a crystal oscillator using SOSCO and SOSCI pins.

bit 4

ORDY:

Oscillator Ready bit (read-only)

= OSCCON1 = OSCCON2; the current system clock is the clock specified by NOSC

= A clock switch is in progress

bit 3

NOSCR:

New Oscillator is Ready bit (read-only)

= A clock switch is in progress and the oscillator selected by NOSC indicates a Ready condition

= A clock switch is not in progress, or the NOSC-selected oscillator is not yet ready

bit 2-0

Unimplemented:

Read as ‘0’.

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