PIC24FJ256GB108-I Datasheet, PDF (290/352 Pages) Microchip Technology – 64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)

PIC24FJ256GB110 FAMILY
REGISTER 26-2: CW2: FLASH CONFIGURATION WORD 2
U-1
U-1
U-1
U-1
U-1
U-1
U-1
U-1
—
—
—
—
—
—
—
—
bit 23
bit 16
R/PO-1
IESO
bit 15
R/PO-1
PLLDIV2
R/PO-1
PLLDIV1
R/PO-1
PLLDIV0
R/PO-1
PLLDIS
R/PO-1
FNOSC2
R/PO-1
FNOSC1
R/PO-1
FNOSC0
bit 8
R/PO-1
R/PO-1
R/PO-1
R/PO-1
R/PO-1
r-1
FCKSM1 FCKSM0 OSCIOFCN IOL1WAY DISUVREG
r
bit 7
R/PO-1
POSCMD1
R/PO-1
POSCMD0
bit 0
Legend:
r = Reserved bit
R = Readable bit
PO = Program-once bit
-n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 23-16
bit 15
bit 14-12
bit 11
bit 10-8
bit 7-6
bit 5
Unimplemented: Read as ‘1’
IESO: Internal External Switchover bit
1 = IESO mode (Two-Speed Start-up) enabled
0 = IESO mode (Two-Speed Start-up) disabled
PLLDIV<2:0>: USB 96 MHz PLL Prescaler Select bits
111 = Oscillator input divided by 12 (48 MHz input)
110 = Oscillator input divided by 10 (40 MHz input)
101 = Oscillator input divided by 6 (24 MHz input)
100 = Oscillator input divided by 5 (20 MHz input)
011 = Oscillator input divided by 4 (16 MHz input)
010 = Oscillator input divided by 3 (12 MHz input)
001 = Oscillator input divided by 2 (8 MHz input)
000 = Oscillator input used directly (4 MHz input)
PLLDIS: USB 96 MHz PLL Disable bit
1 = PLL disabled
0 = PLL enabled (required for all USB operations)
FNOSC<2:0>: Initial Oscillator Select bits
111 = Fast RC Oscillator with Postscaler (FRCDIV)
110 = Reserved
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
FCKSM<1:0>: Clock Switching and Fail-Safe Clock Monitor Configuration bits
1x = Clock switching and Fail-Safe Clock Monitor are disabled
01 = Clock switching is enabled, Fail-Safe Clock Monitor is disabled
00 = Clock switching is enabled, Fail-Safe Clock Monitor is enabled
OSCIOFCN: OSCO Pin Configuration bit
If POSCMD<1:0> = 11 or 00:
1 = OSCO/CLKO/RC15 functions as CLKO (FOSC/2)
0 = OSCO/CLKO/RC15 functions as port I/O (RC15)
If POSCMD<1:0> = 10 or 01:
OSCIOFCN has no effect on OSCO/CLKO/RC15.
DS39897C-page 290
 2009 Microchip Technology Inc.