Datasheet

PIC24FJ64GB004 FAMILY
DS39940D-page 282  2010 Microchip Technology Inc.
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 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1
IESO PLLDIV2 PLLDIV1 PLLDIV0 PLL96MHZ FNOSC2 FNOSC1 FNOSC0
bit 15 bit 8
R/PO-1 R/PO-1 R/PO-1 R/PO-1 U-1 R/PO-1 R/PO-1 R/PO-1
FCKSM1 FCKSM0
OSCIOFCN IOL1WAY — I2C1SEL POSCMD1 POSCMD0
bit 7 bit 0
Legend:
R = Readable bit PO = Program Once bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed ‘1’ = Bit is set ‘0’ = Bit is cleared
bit 23-16 Unimplemented: Read as ‘1’
bit 15 IESO: Internal External Switchover bit
1 = IESO mode (Two-Speed Start-up) is enabled
0 = IESO mode (Two-Speed Start-up) is disabled
bit 14-12 PLLDIV<2:0>: USB 96 MHz PLL Prescaler Select bits
111 = Oscillator input divided by 12 (48 MHz input)
110 = Oscillator input divided by 8 (32 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)
bit 11 PLL96MHZ: USB 96 MHz PLL Start-up Enable bit
1 = 96 MHz PLL is enabled automatically on start-up
0 = 96 MHz PLL is enabled by user in software (controlled with the PLLEN bit in CLKDIV<5>)
bit 10-8 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)
bit 7-6 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
bit 5 OSCIOFCN: OSCO Pin Configuration bit
If POSCMD<1:0> =
11 or 00:
1 = OSCO/CLKO/RA3 functions as CLKO (FOSC/2)
0 = OSCO/CLKO/RA3 functions as port I/O (RC15)
If POSCMD<1:0> =
10 or 01:
OSCIOFCN has no effect on OSCO/CLKO/RA3.