PIC24FJ128GA MICROCHIP [Microchip Technology], PIC24FJ128GA Datasheet - Page 184

• Manufacturer Part Number: PIC24FJ128GA
• Description: General Purpose, 16-Bit Flash Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

PIC24FJ128GA FAMILY
REGISTER 23-2:
DS39747C-page 182
bit 23-16 Unimplemented: Read as ‘1’
bit 15
bit 14-11 Unimplemented: Read as ‘1’
bit 10-8
bit 7-6
bit 5
bit 4-2
bit 1-0
.
Upper Third:
bit 23
U-1
—
Middle Third:
bit 15
IESO: Internal External Switchover bit
1 = IESO mode (Two-Speed Start-up) enabled
0 = IESO mode (Two-Speed Start-up) disabled
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)
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
OSCIOFCN: OSC2 Pin Configuration bit
If POSCMD1:POSCMD0 = 11 or 00:
1 = OSC2/CLKO/RC15 functions as CLKO (F
0 = OSC2/CLKO/RC15 functions as port I/O (RC15)
If POSCMD1:POSCMD0 = 10 or 01:
OSCIOFCN has no effect on OSC2/CLKO/RC15.
Unimplemented: Read as ‘1’
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
-n = Value when unprogrammed
R/PO-1
IESO
U-1
—
Lower Third:
bit 7
FCKSM1
R/PO-1
FLASH CONFIGURATION WORD 2
U-1
—
U-1
—
FCKSM0 OSCIOFCN
R/PO-1
U-1
—
U-1
—
R/PO-1
PO = Program-Once bit
‘1’ = Bit is set
Preliminary
U-1
—
U-1
—
OSC
U-1
—
/2)
U-1
—
U-1
—
U-1
—
FNOSC2
R/PO-1
U = Unimplemented bit, read as ‘1’
‘0’ = Bit is cleared
U-1
—
U-1
—
FNOSC1
R/PO-1
© 2006 Microchip Technology Inc.
U-1
POSCMD1
—
R/PO-1
bit 16
x = Bit is unknown
FNOSC0
R/PO-1
bit 8
POSCMD0
R/PO-1
bit 0