Information

PIC18F2220/2320/4220/4320
DS80334B-page 2 © 2008 Microchip Technology Inc.
REGISTER 2-1: OSCTUNE: OSCILLATOR TUNING
REGISTER values are modified.
In the description of bit 0, the second sentence is
deleted, and the modified content is indicated in bold
text in Register 2-1.
REGISTER 2-1: OSCTUNE: OSCILLATOR TUNING REGISTER
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — TUN5 TUN4 TUN3 TUN2 TUN1 TUN0
bit 7 bit 0
Legend:
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 7-6 Unimplemented: Read as ‘0’
bit 5-1 TUN<5:1>: Frequency Tuning bits – Adjusts the frequency of INTOSC. Can adjust INTRC, depending
on TUNSEL (OSCTUN2<7>)
011111 = Maximum frequency
•
•
000001
000000 = Center frequency. Oscillator module is running at the calibrated frequency
111111
•
•
100000 = Minimum frequency
bit 0 TUN<0>: This bit is a placeholder and has no effect on the INTOSC frequency.