PIC18F66K22-I Datasheet, PDF (47/550 Pages) Microchip Technology – PIC18F87K22 Family Data Sheet

PIC18F87K22 FAMILY
REGISTER 3-3: OSCTUNE: OSCILLATOR TUNING REGISTER
R/W-0
INTSRC
bit 7
R/W-0
PLLEN
R/W-0
TUN5
R/W-0
TUN4
R/W-0
TUN3
R/W-0
TUN2
R/W-0
TUN1
R/W-0
TUN0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5-0
INTSRC: Internal Oscillator Low-Frequency Source Select bit
1 = 31.25 kHz device clock derived from 16 MHz INTOSC source (divide-by-512 enabled, HF-INTOSC)
0 = 31 kHz device clock derived from INTRC 31 kHz oscillator (LF-INTOSC)
PLLEN: Frequency Multiplier PLL Enable bit
1 = PLL is enabled
0 = PLL is disabled
TUN<5:0>: Fast RC Oscillator (INTOSC) Frequency Tuning bits
011111 = Maximum frequency
•
•
•
•
000001
000000 = Center frequency; fast RC oscillator is running at the calibrated frequency
111111
•
•
•
•
100000 = Minimum frequency
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DS39960D-page 47