PIC18F2420-I/SOC01 Microchip, PIC18F2420-I/SOC01 Datasheet - Page 32

• Manufacturer Part Number: PIC18F2420-I/SOC01
• Description: 28 pin, 16 kb flash, 3804 ram, 25 i/o...
• Manufacturer: Microchip

PIC18F2420/2520/4420/4520
REGISTER 2-2:
DS39631E-page 30
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-4
bit 3
bit 2
bit 1-0
Note 1:
IDLEN
R/W-0
2:
3:
Reset state depends on state of the IESO Configuration bit.
Source selected by the INTSRC bit (OSCTUNE<7>), see text.
Default output frequency of INTOSC on Reset.
IDLEN: Idle Enable bit
1 = Device enters an Idle mode on SLEEP instruction
0 = Device enters Sleep mode on SLEEP instruction
IRCF<2:0>: Internal Oscillator Frequency Select bits
111 = 8 MHz (INTOSC drives clock directly)
110 = 4 MHz
101 = 2 MHz
100 = 1 MHz
011 = 500 kHz
010 = 250 kHz
001 = 125 kHz
000 = 31 kHz (from either INTOSC/256 or INTRC directly)
OSTS: Oscillator Start-up Timer Time-out Status bit
1 = Oscillator Start-up Timer (OST) time-out has expired; primary oscillator is running
0 = Oscillator Start-up Timer (OST) 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
SCS<1:0>: System Clock Select bits
1x = Internal oscillator block
01 = Secondary (Timer1) oscillator
00 = Primary oscillator
IRCF2
R/W-1
OSCCON: OSCILLATOR CONTROL REGISTER
(3)
W = Writable bit
‘1’ = Bit is set
R/W-0
IRCF1
IRCF0
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
OSTS
R
(1)
(1)
(2)
IOFS
R-0
© 2008 Microchip Technology Inc.
x = Bit is unknown
R/W-0
SCS1
R/W-0
SCS0
bit 0