PIC32MX1XX Datasheet, PDF (98/320 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
REGISTER 8-1: OSCCON: OSCILLATOR CONTROL REGISTER⁽¹⁾
bit 18-16 PLLMULT<2:0>: Phase-Locked Loop (PLL) Multiplier bits
111 = Clock is multiplied by 24
110 = Clock is multiplied by 21
101 = Clock is multiplied by 20
100 = Clock is multiplied by 19
011 = Clock is multiplied by 18
010 = Clock is multiplied by 17
001 = Clock is multiplied by 16
000 = Clock is multiplied by 15
bit 15 Unimplemented: Read as ‘0’
bit 14-12 COSC<2:0>: Current Oscillator Selection bits
111 = Internal Fast RC (FRC) Oscillator divided by OSCCON<FRCDIV> bits
110 = Internal Fast RC (FRC) Oscillator divided by 16
101 = Internal Low-Power RC (LPRC) Oscillator
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator (POSC) with PLL module (XTPLL, HSPLL or ECPLL)
010 = Primary Oscillator (POSC) (XT, HS or EC)
001 = Internal Fast RC Oscillator with PLL module via Postscaler (FRCPLL)
000 = Internal Fast RC (FRC) Oscillator
bit 11 Unimplemented: Read as ‘0’
bit 10-8 NOSC<2:0>: New Oscillator Selection bits
111 = Internal Fast RC Oscillator (FRC) divided by OSCCON<FRCDIV> bits
110 = Internal Fast RC Oscillator (FRC) divided by 16
101 = Internal Low-Power RC (LPRC) Oscillator
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL or ECPLL)
010 = Primary Oscillator (XT, HS or EC)
001 = Internal Fast Internal RC Oscillator with PLL module via Postscaler (FRCPLL)
000 = Internal Fast Internal RC Oscillator (FRC)
On Reset, these bits are set to the value of the FNOSC Configuration bits (DEVCFG1<2:0>).
bit 7
CLKLOCK: Clock Selection Lock Enable bit
If clock switching and monitoring is disabled (FCKSM<1:0> = 1x):
1 = Clock and PLL selections are locked
0 = Clock and PLL selections are not locked and may be modified
If clock switching and monitoring is enabled (FCKSM<1:0> = 0x):
Clock and PLL selections are never locked and may be modified.
bit 6
ULOCK: USB PLL Lock Status bit⁽²⁾
1 = Indicates that the USB PLL module is in lock or USB PLL module start-up timer is satisfied
0 = Indicates that the USB PLL module is out of lock or USB PLL module start-up timer is in progress or
USB PLL is disabled
bit 5
SLOCK: PLL Lock Status bit
1 = PLL module is in lock or PLL module start-up timer is satisfied
0 = PLL module is out of lock, PLL start-up timer is running or PLL is disabled
bit 4
SLPEN: Sleep Mode Enable bit
1 = Device will enter Sleep mode when a WAIT instruction is executed
0 = Device will enter Idle mode when a WAIT instruction is executed
bit 3
CF: Clock Fail Detect bit
1 = FSCM has detected a clock failure
0 = No clock failure has been detected
Note 1: Writes to this register require an unlock sequence. Refer to Section 6. “Oscillator” (DS61112) in the
“PIC32 Family Reference Manual” for details.
2: This bit is available on PIC32MX2XX devices only.
DS61168D-page 98
Preliminary
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