PIC24FJ16GA MICROCHIP [Microchip Technology], PIC24FJ16GA Datasheet - Page 204

• Manufacturer Part Number: PIC24FJ16GA
• Description: 28/44-Pin General Purpose, 16-Bit Flash Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

PIC24FJ64GA004 FAMILY
REGISTER 23-2:
DS39881C-page 202
bit 23
bit 15
bit 7
Legend:
R = Readable bit
-n = Value when device is unprogrammed
bit 23-16
bit 15
bit 14-11
bit 10-8
bit 7-6
bit 5
bit 4
bit 3
bit 2
bit 1-0
FCKSM1
R/PO-1
R/PO-1
IESO
U-1
—
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
Unimplemented: Read as ‘1’
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 (XTPLL, 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: OSCO Pin Configuration bit
If POSCMD1:POSCMD0 = 11 or 00:
1 = OSCO/CLKO/RA3 functions as CLKO (F
0 = OSCO/CLKO/RA3 functions as port I/O (RA3)
If POSCMD1:POSCMD0 = 10 or 01:
OSCIOFCN has no effect on OSCO/CLKO/RA3.
IOL1WAY: IOLOCK One-Way Set Enable bit
1 = The OSCCON<IOLOCK> bit can be set once, provided the unlock sequence has been completed.
0 = The OSCCON<IOLOCK> bit can be set and cleared as needed, provided the unlock sequence has
Unimplemented: Read as ‘1’
I2C1SEL: I2C1 Pin Select bit
1 = Use default SCL1/SDA1 pins
0 = Use alternate SCL1/SDA1 pins
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
FCKSM0
R/PO-1
Once set, the Peripheral Pin Select registers cannot be written to a second time.
been completed
U-1
U-1
—
—
CW2: FLASH CONFIGURATION WORD 2
r = Reserved bit
PO = Program Once bit
OSCIOFCN
R/PO-1
U-1
U-1
—
—
IOL1WAY
R/PO-1
U-1
U-1
—
—
Preliminary
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
OSC
/2)
U-1
U-1
U-1
—
—
—
FNOSC2
I2C1SEL
R/PO-1
R/PO-1
U-1
—
© 2008 Microchip Technology Inc.
‘0’ = Bit is cleared
POSCMD1
FNOSC1
R/PO-1
R/PO-1
U-1
—
POSCMD0
FNOSC0
R/PO-1
R/PO-1
U-1
—
bit 16
bit 8
bit 0