PIC18F2220 MICROCHIP [Microchip Technology], PIC18F2220 Datasheet - Page 27

• Manufacturer Part Number: PIC18F2220
• Description: 28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 2-8:
 2003 Microchip Technology Inc.
T1OSO
T1OSI
OSC2
OSC1
Primary Oscillator
Secondary Oscillator
PIC18F2X20/4X20 CLOCK DIAGRAM
OSCCON<6:4>
Oscillator
Internal
Source
INTRC
T1OSCEN
Enable
Oscillator
Block
Sleep
(INTOSC)
8 MHz
PIC18F2220/2320/4220/4320
PIC18F2X20/4X20
500 kHz
250 kHz
125 kHz
31 kHz
8 MHz
4 MHz
2 MHz
1 MHz
OSCCON<6:4>
111
110
101
100
011
010
001
000
4 x PLL
Clock Source Option
for Other Modules
CONFIG1H <3:0>
HSPLL
LP, XT, HS, RC, EC
Internal Oscillator
T1OSC
Control
Clock
DS39599C-page 25
WDT, FSCM
OSCCON<1:0>
Peripherals
IDLEN
CPU