PIC24FJ128GA Datasheet, PDF (184/232 Pages) Microchip Technology – General Purpose, 16-Bit Flash Microcontrollers

PIC24FJ128GA FAMILY
REGISTER 23-2: FLASH CONFIGURATION WORD 2
Upper Third:
U-1
U-1
U-1
U-1
U-1
U-1
U-1
U-1
—
—
—
—
—
—
—
—
bit 23
bit 16
Middle Third:
R/PO-1
U-1
U-1
U-1
U-1
R/PO-1 R/PO-1 R/PO-1
IESO
—
—
—
—
FNOSC2 FNOSC1 FNOSC0
bit 15
bit 8
Lower Third:
R/PO-1 R/PO-1 R/PO-1
U-1
U-1
U-1
R/PO-1
R/PO-1
FCKSM1 FCKSM0 OSCIOFCN —
—
—
POSCMD1 POSCMD0
bit 7
bit 0
bit 23-16 Unimplemented: Read as ‘1’
bit 15 IESO: Internal External Switchover bit
1 = IESO mode (Two-Speed Start-up) enabled
0 = IESO mode (Two-Speed Start-up) disabled
bit 14-11 Unimplemented: Read as ‘1’
bit 10-8 FNOSC2:FNOSC0: 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 (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 FCKSM1:FCKSM0: 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: OSC2 Pin Configuration bit
If POSCMD1:POSCMD0 = 11 or 00:
1 = OSC2/CLKO/RC15 functions as CLKO (FOSC/2)
0 = OSC2/CLKO/RC15 functions as port I/O (RC15)
If POSCMD1:POSCMD0 = 10 or 01:
OSCIOFCN has no effect on OSC2/CLKO/RC15.
bit 4-2 Unimplemented: Read as ‘1’
bit 1-0 POSCMD1:POSCMD0: Primary Oscillator Configuration bits
11 = Primary oscillator disabled
10 = HS Oscillator mode selected
01 = XT Oscillator mode selected
00 = EC Oscillator mode selected
.
Legend:
R = Readable bit
PO = Program-Once bit U = Unimplemented bit, read as ‘1’
-n = Value when unprogrammed ‘1’ = Bit is set
‘0’ = Bit is cleared x = Bit is unknown
DS39747C-page 182
Preliminary
© 2006 Microchip Technology Inc.