PIC18LF24K Datasheet, PDF (22/594 Pages) –

PIC18(L)F26/45/46K40
3.2 Register Definitions: Configuration Words
REGISTER 3-1:
U-1
—
bit 7
Configuration Word 1L (30 0000h): Oscillators
R/W-1
R/W-1
R/W-1
U-1
R/W-1
RSTOSC<2:0>
—
R/W-1
FEXTOSC<2:0>
R/W-1
bit 0
Legend:
R = Readable bit
-n = Value for blank device
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘1’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6-4
bit 3
bit 2-0
Unimplemented: Read as ‘1’
RSTOSC<2:0>: Power-up Default Value for COSC bits
This value is the Reset default value for COSC and selects the oscillator first used by user software.
Refer to COSC operation.
111 = EXTOSC operating per FEXTOSC bits (device manufacturing default)
110 = HFINTOSC with HFFRQ = 4 MHz (Register 4-5) and CDIV = 4:1 (Register 4-2)
101 = LFINTOSC
100 = SOSC
011 = Reserved
010 = EXTOSC with 4x PLL, with EXTOSC operating per FEXTOSC bits
001 = Reserved
000 = HFINTOSC with HFFRQ = 64 MHz (Register 4-5) and CDIV = 1:1 (Register 4-2). Resets
COSC/NOSC to 3’b110.
Unimplemented: Read as ‘1’
FEXTOSC<2:0>: FEXTOSC External Oscillator Mode Selection bits
111 = EC (external clock) above 8 MHz; PFM set to high power (device manufacturing default)
110 = EC (external clock) for 500 kHz to 8 MHz; PFM set to medium power
101 = EC (external clock) below 500 kHz; PFM set to low power
100 = Oscillator not enabled
011 = Reserved (do not use)
010 = HS (crystal oscillator) above 8 MHz; PFM set to high power
001 = XT (crystal oscillator) above 500 kHz, below 8 MHz; PFM set to medium power
000 = LP (crystal oscillator) optimized for 32.768 kHz; PFM set to low power
 2016 Microchip Technology Inc.
Preliminary
DS40001816C-page 22