PIC18F23K22-ESLASHML datasheet(351/496 Pages) MICROCHIP

351 / 496 page

 2010 Microchip Technology Inc.

Preliminary

DS41412C-page 351

PIC18(L)F2X/4XK22

CONFIG1H: CONFIGURATION REGISTER 1 HIGH

R/P-0

R/P-1

R/P-0

R/P-1

R/P-0

R/P-1

IESO

FCMEN

PRICLKEN

PLLCFG

FOSC<3:0>

bit 7

bit 0

Legend:

R = Readable bit

P = Programmable bit

U = Unimplemented bit, read as ‘0’

-n = Value when device is unprogrammed

x = Bit is unknown

bit 7

IESO(1): Internal/External Oscillator Switchover bit

1 = Oscillator Switchover mode enabled

0 = Oscillator Switchover mode disabled

bit 6

FCMEN(1): Fail-Safe Clock Monitor Enable bit

1 = Fail-Safe Clock Monitor enabled

0 = Fail-Safe Clock Monitor disabled

bit 5

PRICLKEN: Primary Clock Enable bit

1 = Primary Clock is always enabled

0 = Primary Clock can be disabled by software

bit 4

PLLCFG: 4 x PLL Enable bit

1 = 4 x PLL always enabled, Oscillator multiplied by 4

0 = 4 x PLL is under software control, PLLEN (OSCTUNE<6>)

bit 3-0

FOSC<3:0>: Oscillator Selection bits

1111 = External RC oscillator, CLKOUT function on RA6

1110 = External RC oscillator, CLKOUT function on RA6

1101 = EC oscillator (low power, <500 kHz)

1100 = EC oscillator, CLKOUT function on OSC2 (low power, <500 kHz)

1011 = EC oscillator (medium power, 500 kHz-16 MHz)

1010 = EC oscillator, CLKOUT function on OSC2 (medium power, 500 kHz-16 MHz)

1001 = Internal oscillator block, CLKOUT function on OSC2

1000 = Internal oscillator block

0111 = External RC oscillator

0110 = External RC oscillator, CLKOUT function on OSC2

0101 = EC oscillator (high power, >16 MHz)

0100 = EC oscillator, CLKOUT function on OSC2 (high power, >16 MHz)

0011= HS oscillator (medium power, 4 MHz-16 MHz)

0010= HS oscillator (high power, >16 MHz)

0001= XT oscillator

0000= LP oscillator

Note 1:

When FOSC<3:0> is configured for HS, XT, or LP oscillator and FCMEN bit is set, then the IESO bit

should also be set to prevent a false failed clock indication and to enable automatic clock switch over from

the internal oscillator block to the external oscillator when the OST times out.

PIC18F23K22-E/ML Datasheet(PDF) 351 Page - Microchip Technology

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