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PIC18F23K22 Datasheet, PDF (32/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology
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PIC18(L)F2X/4XK22
REGISTER 2-1: OSCCON: OSCILLATOR CONTROL REGISTER
R/W-0
IDLEN
bit 7
R/W-0
R/W-1
IRCF<2:0>
R/W-1
R-q
OSTS(1)
R-0
HFIOFS
R/W-0
R/W-0
SCS<1:0>
bit 0
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
q = depends on condition
x = Bit is unknown
bit 7
bit 6-4
IDLEN: Idle Enable bit
1 = Device enters Idle mode on SLEEP instruction
0 = Device enters Sleep mode on SLEEP instruction
IRCF<2:0>: Internal RC Oscillator Frequency Select bits(2)
111 = HFINTOSC – (16 MHz)
110 = HFINTOSC/2 – (8 MHz)
101 = HFINTOSC/4 – (4 MHz)
100 = HFINTOSC/8 – (2 MHz)
011 = HFINTOSC/16 – (1 MHz)(3)
If INTSRC = 0 and MFIOSEL = 0:
010 = HFINTOSC/32 – (500 kHz)
001 = HFINTOSC/64 – (250 kHz)
000 = LFINTOSC – (31.25 kHz)
If INTSRC = 1 and MFIOSEL = 0:
010 = HFINTOSC/32 – (500 kHz)
001 = HFINTOSC/64 – (250 kHz)
000 = HFINTOSC/512 – (31.25 kHz)
If INTSRC = 0 and MFIOSEL = 1:
010 = MFINTOSC – (500 kHz)
001 = MFINTOSC/2 – (250 kHz)
000 = LFINTOSC – (31.25 kHz)
bit 3
bit 2
bit 1-0
If INTSRC = 1 and MFIOSEL = 1:
010 = MFINTOSC – (500 kHz)
001 = MFINTOSC/2 – (250 kHz)
000 = MFINTOSC/16 – (31.25 kHz)
OSTS: Oscillator Start-up Time-out Status bit
1 = Device is running from the clock defined by FOSC<3:0> of the CONFIG1H register
0 = Device is running from the internal oscillator (HFINTOSC, MFINTOSC or LFINTOSC)
HFIOFS: HFINTOSC Frequency Stable bit
1 = HFINTOSC frequency is stable
0 = HFINTOSC frequency is not stable
SCS<1:0>: System Clock Select bit
1x = Internal oscillator block
01 = Secondary (SOSC) oscillator
00 = Primary clock (determined by FOSC<3:0> in CONFIG1H).
Note 1: Reset state depends on state of the IESO Configuration bit.
2: INTOSC source may be determined by the INTSRC bit in OSCTUNE and the MFIOSEL bit in OSCCON2.
3: Default output frequency of HFINTOSC on Reset.
DS41412B-page 32
Preliminary
 2010 Microchip Technology Inc.
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