PIC24F04KA201 Datasheet, PDF (166/224 Pages) Microchip Technology – 14/20-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP™ Technology

PIC24F04KA201 FAMILY
REGISTER 23-2: FOSCSEL: OSCILLATOR SELECTION CONFIGURATION REGISTER
R/P-1
U-0
U-0
U-0
U-0
R/P-1
R/P-1
IESO
—
—
—
—
FNOSC2 FNOSC1
bit 7
R/P-1
FNOSC0
bit 0
Legend:
R = Readable bit
-n = Value at POR
P = Programmable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6-3
bit 2-0
IESO: Internal External Switchover bit
1 = Internal External Switchover mode enabled (Two-Speed Start-up enabled)
0 = Internal External Switchover mode disabled (Two-Speed Start-up disabled)
Unimplemented: Read as ‘0’
FNOSC<2:0>: Oscillator Selection bits
000 = Fast RC oscillator (FRC)
001 = Fast RC oscillator with divide-by-N with PLL module (FRCDIV+PLL)
010 = Primary oscillator (XT, HS, EC)
011 = Primary oscillator with PLL module (HS+PLL, EC+PLL)
100 = Secondary oscillator (SOSC)
101 = Low-Power RC oscillator (LPRC)
110 = 500 kHz Low-Power FRC oscillator with divide-by-N (LPFRCDIV)
111 = 8 MHz FRC oscillator with divide-by-N (FRCDIV)
DS39937B-page 164
Preliminary
© 2009 Microchip Technology Inc.