PIC18F2220_07 Datasheet, PDF (28/386 Pages) Microchip Technology – 28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F2220/2320/4220/4320
REGISTER 2-2:
OSCCON REGISTER
R/W-0 R/W-0 R/W-0
IDLEN IRCF2 IRCF1
bit 7
R/W-0
IRCF0
R⁽¹⁾
OSTS
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 = Idle mode enabled; CPU core is not clocked in power-managed modes
0 = Run mode enabled; CPU core is clocked in power-managed modes
IRCF2:IRCF0: Internal Oscillator Frequency Select bits
111 = 8 MHz (8 MHz source drives clock directly)
110 = 4 MHz
101 = 2 MHz
100 = 1 MHz
011 = 500 kHz
010 = 250 kHz
001 = 125 kHz
000 = 31 kHz (INTRC source drives clock directly)
OSTS: Oscillator Start-up Time-out Status bit⁽¹⁾
1 = Oscillator start-up time-out timer has expired; primary oscillator is running
0 = Oscillator start-up time-out timer 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 (RC modes)
01 = Timer1 oscillator (Secondary modes)⁽²⁾
00 = Primary oscillator (Sleep and PRI_IDLE modes)
Note 1: Depends on state of IESO bit in Configuration Register 1H.
2: SCS0 may not be set while T1OSCEN (T1CON<3>) is clear.
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
DS39599F-page 26
© 2007 Microchip Technology Inc.