Datasheet

PIC18F47J53 FAMILY
DS39964B-page 44 Preliminary  2010 Microchip Technology Inc.
REGISTER 3-3: OSCCON2: OSCILLATOR CONTROL REGISTER 2 (ACCESS F87h)
U-0 R-0
(2)
U-0 R/W-1 R/W-0
(2)
R/W-1 U-0 U-0
—
SOSCRUN
—
SOSCDRV SOSCGO
(3)
PRISD
— —
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 Unimplemented: Read as ‘0’
bit 6 SOSCRUN: SOSC Run Status bit
1 = System clock comes from secondary SOSC
0 = System clock comes from an oscillator other than SOSC
bit 5 Unimplemented: Read as ‘0’
bit 4 SOSCDRV: SOSC Drive Control bit
1 = T1OSC/SOSC oscillator drive circuit is selected by Configuration bits, CONFIG2L <4:3>
0 = Low-power T1OSC/SOSC circuit is selected
bit 3 SOSCGO: Oscillator Start Control bit
(3)
1 = Turns on the oscillator, even if no peripherals are requesting it
0 = Oscillator is shut off unless peripherals are requesting it
bit 2 PRISD: Primary Oscillator Drive Circuit Shutdown bit
1 = Oscillator drive circuit is on
0 = Oscillator drive circuit is off (zero power)
bit 1-0 Unimplemented: Read as ‘0’
Note 1: Reset value is ‘0’ when Two-Speed Start-up is enabled and ‘1’ if disabled.
2: Default output frequency of INTOSC on Reset (4 MHz).
3: When the SOSC is selected to run from a digital clock input, rather than an external crystal, this bit has no
effect.