64GA106 datasheet(248/330 Pages) MICROCHIP

248 / 330 page

PIC24FJ256GA110 FAMILY

DS39905E-page 248

 2010 Microchip Technology Inc.

CW2: FLASH CONFIGURATION WORD 2

R/PO-1

—

bit 23

bit 16

R/PO-1

IESO

—

FNOSC2

FNOSC1

FNOSC0

bit 15

bit 8

R/PO-1

FCKSM1

FCKSM0

OSCIOFCN

IOL1WAY

—

I2C2SEL(1)

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

Reserved

bit 15

IESO:

Internal External Switchover bit

= IESO mode (Two-Speed Start-up) enabled

= IESO mode (Two-Speed Start-up) disabled

bit 14-11

Reserved

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

= Clock switching and Fail-Safe Clock Monitor are disabled

= Clock switching is enabled, Fail-Safe Clock Monitor is disabled

= Clock switching is enabled, Fail-Safe Clock Monitor is enabled

bit 5

OSCIOFCN:

OSCO Pin Configuration bit

If POSCMD<1:0> = 11 or 00:

= OSCO/CLKO/RC15 functions as CLKO (FOSC/2)

= OSCO/CLKO/RC15 functions as port I/O (RC15)

If POSCMD<1:0> = 10 or 01:

OSCIOFCN has no effect on OSCO/CLKO/RC15.

bit 4

IOL1WAY:

IOLOCK One-Way Set Enable bit

= The IOLOCK bit (OSCCON<6>) can be set once, provided the unlock sequence has been

completed. Once set, the Peripheral Pin Select registers cannot be written to a second time.

= The IOLOCK bit can be set and cleared as needed, provided the unlock sequence has been

completed

bit 3

Reserved

bit 2

I2C2SEL:

I2C2 Pin Select bit(1)

= Use SCL2/SDA2 pins for I2C2

= Use ASCL2/ASDA2 pins for I2C2

Note 1:

Implemented in 100-pin devices only; otherwise unimplemented, read as ‘1’.

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