Microchip Technology IC MCU 8BIT PIC18F65K22-I/PT TQFP-64 MCP PIC18F65K22-I/PT Data Sheet
Product codes
PIC18F65K22-I/PT
2009-2011 Microchip Technology Inc.
DS39960D-page 47
PIC18F87K22 FAMILY
REGISTER 3-3:
OSCTUNE: OSCILLATOR TUNING REGISTER
R/W-0 R/W-0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
INTSRC
PLLEN
TUN5
TUN4
TUN3
TUN2
TUN1
TUN0
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
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)
bit 6
PLLEN:
Frequency Multiplier PLL Enable bit
1
= PLL is enabled
0
= PLL is disabled
bit 5-0
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