PIC18F2331 Datasheet, PDF (29/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 2-8:
PIC18F2331/2431/4331/4431 CLOCK DIAGRAM
OSC2
OSC1
T1OSO
T1OSI
Primary Oscillator
Sleep
PIC18F2331/2431/4331/4431
C4NFIG1H <3:0>
4 x PLL ^HSPLL
Clock
Control
LP, XT, HS, RC, EC
Secondary Oscillator
T1OSCEN
Enable
Oscillator
OSCCON<6:4>
Internal
Oscillator
Block
INTRC
Source
8 MHz
(INTOSC)
T1OSC
Clock Source Option
for Other Modules
OSCCON<6:4> _{Internal Oscillator}
8 MHz
111
4 MHz
110
2 MHz
101
1 MHz
100
500 kHz
011
250 kHz
010
125 kHz
001
31 kHz
000
OSCCON<1:0>
Peripherals
CPU
IDLEN
WDT, FSCM
 2003 Microchip Technology Inc.
Preliminary
DS39616B-page 27