PIC24HJ128GP206-I Datasheet, PDF (124/286 Pages) Microchip Technology – High-Performance, 16-Bit Microcontrollers

PIC24HJXXXGPX06/X08/X10
REGISTER 8-1: OSCCON: OSCILLATOR CONTROL REGISTER
U-0
—
bit 15
R-0
R-0
R-0
U-0
R/W-y
COSC<2:0>
—
R/W-y
NOSC<2:0>
R/W-y
bit 8
R/W-0
U-0
CLKLOCK
—
bit 7
R-0
U-0
R/C-0
LOCK
—
CF
U-0
R/W-0
R/W-0
—
LPOSCEN OSWEN
bit 0
Legend:
R = Readable bit
-n = Value at POR
y = Value set from Configuration bits on POR
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
bit 14-12
bit 11
bit 10-8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Unimplemented: Read as ‘0’
COSC<2:0>: Current Oscillator Selection bits (read-only)
000 = Fast RC oscillator (FRC)
001 = Fast RC oscillator (FRC) with PLL
010 = Primary oscillator (XT, HS, EC)
011 = Primary oscillator (XT, HS, EC) with PLL
100 = Secondary oscillator (SOSC)
101 = Low-Power RC oscillator (LPRC)
110 = Fast RC oscillator (FRC) with Divide-by-16
111 = Fast RC oscillator (FRC) with Divide-by-n
Unimplemented: Read as ‘0’
NOSC<2:0>: New Oscillator Selection bits
000 = Fast RC oscillator (FRC)
001 = Fast RC oscillator (FRC) with PLL
010 = Primary oscillator (XT, HS, EC)
011 = Primary oscillator (XT, HS, EC) with PLL
100 = Secondary oscillator (SOSC)
101 = Low-Power RC oscillator (LPRC)
110 = Fast RC oscillator (FRC) with Divide-by-16
111 = Fast RC oscillator (FRC) with Divide-by-n
CLKLOCK: Clock Lock Enable bit
1 = If (FCKSM0 = 1), then clock and PLL configurations are locked.
If (FCKSM0 = 0), then clock and PLL configurations may be modified.
0 = Clock and PLL selections are not locked, configurations may be modified
Unimplemented: Read as ‘0’
LOCK: PLL Lock Status bit (read-only)
1 = Indicates that PLL is in lock, or PLL start-up timer is satisfied
0 = Indicates that PLL is out of lock, start-up timer is in progress or PLL is disabled
Unimplemented: Read as ‘0’
CF: Clock Fail Detect bit (read/clear by application)
1 = FSCM has detected clock failure
0 = FSCM has not detected clock failure
Unimplemented: Read as ‘0’
LPOSCEN: Secondary (LP) Oscillator Enable bit
1 = Enable secondary oscillator
0 = Disable secondary oscillator
OSWEN: Oscillator Switch Enable bit
1 = Request oscillator switch to selection specified by NOSC<2:0> bits
0 = Oscillator switch is complete
DS70175F-page 122
© 2007 Microchip Technology Inc.