PIC18F6390 Datasheet, PDF (40/412 Pages) Microchip Technology – 64/80-Pin Flash Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F6390/6490/8390/8490
REGISTER 2-2:
OSCCON: OSCILLATOR CONTROL REGISTER
R/W-0 R/W-1 R/W-0 R/W-0
R⁽¹⁾
IDLEN IRCF2 IRCF1 IRCF0 OSTS
bit 7
R-0
IOFS
R/W-0
SCS1
R/W-0
SCS0
bit 0
bit 7
bit 6-4
bit 3
bit 2
bit 1-0
IDLEN: Idle Enable bit
1 = Device enters Idle mode on SLEEP instruction
0 = Device enters Sleep mode on SLEEP instruction
IRCF2:IRCF0: Internal Oscillator Frequency Select bits
111 = 8 MHz (INTOSC drives clock directly)
110 = 4 MHz
101 = 2 MHz
100 = 1 MHz ⁽³⁾
011 = 500 kHz
010 = 250 kHz
001 = 125 kHz
000 = 31 kHz (from either INTOSC/256 or INTRC directly⁽²⁾)
OSTS: Oscillator Start-up Time-out Status bit⁽¹⁾
1 = Oscillator start-up timer time-out has expired; primary oscillator is running
0 = Oscillator start-up timer time-out is running; primary oscillator is not ready
IOFS: INTOSC Frequency Stable bit
1 = INTOSC frequency is stable
0 = INTOSC frequency is not stable
SCS1:SCS0: System Clock Select bits
1x = Internal oscillator block
01 = Timer1 oscillator
00 = Primary oscillator
Note 1: Depends on state of the IESO configuration bit.
2: Source selected by the INTSRC bit (OSCTUNE<7>), see
Section 2.6.3 “OSCTUNE Register”.
3: Default output frequency of INTOSC on Reset.
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
DS39629B-page 38
Preliminary
 2004 Microchip Technology Inc.