DSPIC33FJ16GS204-I/SP View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
DSPIC33FJ16GS204-I/SP Datasheet PDF : 346 Pages
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dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04
REGISTER 8-1:
U-0
—
bit 15
OSCCON: OSCILLATOR CONTROL REGISTER(1)
R-0
R-0
R-0
U-0
R/W-y
COSC<2:0>
—
R/W-y
NOSC<2:0>(2)
R/W-y
bit 8
R/W-0
R/W-0
R-0
U-0
R/C-0
U-0
CLKLOCK IOLOCK
LOCK
—
CF
—
bit 7
U-0
R/W-0
—
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
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 = Reserved
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(2)
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 = Reserved
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
If clock switching is enabled and FSCM is disabled, (FOSC<FCKSM> = 0b01):
1 = Clock switching is disabled, system clock source is locked
0 = Clock switching is enabled, system clock source can be modified by clock switching
IOLOCK: Peripheral Pin Select Lock bit
1 = Peripherial pin select is locked, write to Peripheral Pin Select registers not allowed
0 = Peripherial pin select is not locked, write to Peripheral Pin Select registers allowed
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’
Note 1: Writes to this register require an unlock sequence. Refer to Section 42. “Oscillator (Part IV)” (DS70307)
in the “dsPIC33F Family Reference Manual” (available from the Microchip website) for details.
2: Direct clock switches between any primary oscillator mode with PLL and FRCPLL mode are not permitted.
This applies to clock switches in either direction. In these instances, the application must switch to FRC mode
as a transition clock source between the two PLL modes.
DS70318D-page 138
Preliminary
© 2009 Microchip Technology Inc.
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