Information

PIC18F2220/2320/4220/4320

3. Module: OSCTUN2 REGISTER

The bullet points in the second paragraph of

Section 2.6.3 “OSCTUN2 Register” on page 24

are modified. The modified values indicate that the

OSCTUNE register does not affect the INTRC

frequency. The modified values are indicated in

bold text in the following excerpt of the section:

• If TUNSEL (OSCTUN2<7>) is clear – The

INTOSC clock frequency can be adjusted by

the TUN5:TUN1 bits in OSCTUNE<5:1> without

affecting the INTRC frequency

(see Register 2-1:OSCTUNE).

• If TUNSEL (OSCTUN2<7>) is set – The INTRC

clock frequency can be adjusted by the

TUN5:TUN1 bits in OSCTUN2<5:1> without

affecting the INTOSC frequency

(see Register 2-2: OSCTUN2).

TUNING REGISTER values are modified. The

modified content for bit 7 is indicated in bold text and

the second sentence in bit 0 is deleted, and the

modified content is indicated in bold text in

R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0

TUNSEL

— 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 TUNSEL: INTRC Frequency bit

1 = INTRC frequency adjusted according to the values of the OSCTUN2<5:1> bits

0 = INTRC not affected

bit 6 Unimplemented: Read as ‘0’

bit 5-1 TUN<5:1>: Frequency Tuning bits – Adjusts the frequency of INTRC when TUNSEL is set

011111 = Maximum frequency

•

000001

000000 = Center frequency. Oscillator module is running at the calibrated frequency

111111

•

100000 = Minimum frequency

bit 0 TUN<0>: Placeholder. This bit has no effect on the INTRC frequency.