Datasheet

dsPIC30F6011A/6012A/6013A/6014A
DS70143E-page 150 © 2011 Microchip Technology Inc.
REGISTER 20-1: OSCCON: OSCILLATOR CONTROL REGISTER
U-0 R-y R-y R-y U-0 R/W-y R/W-y R/W-y
— COSC<2:0> — NOSC<2:0>
bit 15 bit 8
R/W-0 R/W-0 R-0 U-0 R/W-0 U-0 R/W-0 R/W-0
POST<1:0> LOCK
—CF — LPOSCEN OSWEN
bit 7 bit 0
Legend: y = Values dependent on F
OSC
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 15 Unimplemented: Read as ‘0’
bit 14-12 COSC<2:0>: Current Oscillator Group Selection bits (read-only)
111 = PLL Oscillator; PLL source selected by FPR<4:0> bits
011 = External Oscillator; OSC1/OSC2 pins; External Oscillator configuration selected by FPR<4:0>
bits
010 = LPRC internal low-power RC
001 = FRC internal fast RC
000 = LP crystal oscillator; SOSCI/SOSCO pins
Set to FOS<2:0> values on POR or BOR.
Loaded with NOSC<2:0> at the completion of a successful clock switch.
Set to FRC value when FSCM detects a failure and switches clock to FRC.
bit 11 Unimplemented: Read as ‘0’
bit 10-8 NOSC<2:0>: New Oscillator Group Selection bits
111 = PLL Oscillator; PLL source selected by FPR<4:0> bits
011 = External Oscillator; OSC1/OSC2 pins; External Oscillator configuration selected by FPR<4:0>
bits
010 = LPRC internal low-power RC
001 = FRC internal fast RC
000 = LP crystal oscillator; SOSCI/SOSCO pins
Set to FOS<2:0> values on POR or BOR.
bit 7-6 POST<1:0>: Oscillator Postscaler Selection bits
11 = Oscillator postscaler divides clock by 64
10 = Oscillator postscaler divides clock by 16
01 = Oscillator postscaler divides clock by 4
00 = Oscillator postscaler does not alter clock
bit 5 LOCK: PLL Lock status bit (Read Only)
1 = Indicates that PLL is in lock
0 = Indicates that PLL is out of lock (or disabled)
bit 4 Unimplemented: Read as ‘0’
bit 3 CF: Clock Fail Detect bit (read/clearable by application)
1 = FSCM has detected clock failure
0 = FSCM has NOT detected clock failure
bit 2 Unimplemented: Read as ‘0’
bit 1 LPOSCEN: 32 kHz Secondary (LP) Oscillator Enable
1 = Secondary Oscillator is enabled
0 = Secondary Oscillator is disabled
bit 0 OSWEN: Oscillator Switch Enable bit
1 = Request Oscillator switch to selection specified by NOSC<2:0> bits
0 = Oscillator switch is complete