PIC18F2450_08 Datasheet, PDF (31/324 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

PIC18F2450/4450
TABLE 2-3: OSCILLATOR CONFIGURATION OPTIONS FOR USB OPERATION (CONTINUED)
Input Oscillator
Frequency
PLL Division
(PLLDIV2:PLLDIV0)
Clock Mode
(FOSC3:FOSC0)
MCU Clock Division
(CPUDIV1:CPUDIV0)
Microcontroller
Clock Frequency
None (00)
12 MHz
HS, EC, ECIO
÷2 (01)
÷3 (10)
6 MHz
4 MHz
12 MHz
÷3 (010)
÷4 (11)
÷2 (00)
3 MHz
48 MHz
HSPLL, ECPLL, ECPIO
÷3 (01)
÷4 (10)
32 MHz
24 MHz
÷6 (11)
16 MHz
None (00)
8 MHz
HS, EC, ECIO
÷2 (01)
÷3 (10)
4 MHz
2.67 MHz
8 MHz
÷2 (001)
÷4 (11)
÷2 (00)
2 MHz
48 MHz
HSPLL, ECPLL, ECPIO
÷3 (01)
÷4 (10)
32 MHz
24 MHz
÷6 (11)
16 MHz
None (00)
4 MHz
XT, HS, EC, ECIO
÷2 (01)
÷3 (10)
2 MHz
1.33 MHz
4 MHz
÷1 (000)
÷4 (11)
÷2 (00)
1 MHz
48 MHz
HSPLL, ECPLL, XTPLL,
ECPIO
÷3 (01)
÷4 (10)
32 MHz
24 MHz
÷6 (11)
16 MHz
Legend:
All clock frequencies, except 24 MHz, are exclusively associated with full-speed USB operation (USB clock of 48 MHz).
Bold is used to highlight clock selections that are compatible with low-speed USB operation (system clock of 24 MHz,
USB clock of 6 MHz).
Note 1: Only valid when the USBDIV Configuration bit is cleared.
© 2008 Microchip Technology Inc.
DS39760D-page 29