PIC18F44K22-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F44K22-I/SO

28/40/44-Pin, Low-Power,High-Performance Microcontrollers with XLP Technology

Microchip Technology 

PIC18(L)F2X/4XK22

FIGURE 2-1:

SIMPLIFIED OSCILLATOR SYSTEM BLOCK DIAGRAM

Secondary Oscillator(1)

SOSCO

SOSCI

Secondary

Oscillator

(SOSC)

SOSCOUT

Primary Clock Module

PRICLKEN

PRISD

OSC2

OSC1

EN

Primary

Oscillator(2)

( OSC)

FOSC<3:0>(5)

Primary Oscillator

0

INTOSC

1

PLL Select(3) (4)

4xPLL

0

1

Low-Power Mode

Event Switch

(SCS<1:0>)

2

Secondary

Oscillator

01

Primary

Clock

00

Internal Oscillator

IRCF<2:0>

MFIOSEL

3

INTSRC

HFINTOSC

(16 MHz)

MFINTOSC

(500 kHz)

INTOSC

Divide

Circuit

HF-16 MHZ

HF-8 MHZ

HF-4 MHZ

HF-2 MHZ

HF-1 MHZ

HF-500 kHZ

HF-250 kHZ

HF-31.25 kHZ

MF-500 kHZ

MF-250 kHZ

MF-31.25 kHZ

LFINTOSC

(31.25 kHz)

LF-31.25 kHz

3

INTOSC

INTOSC

1x

Note 1: Details in Figure 2-4.

2: Details in Figure 2-2.

3: Details in Figure 2-3.

4: Details in Table 2-1.

5: The Primary Oscillator MUX uses the INTOSC branch when FOSC<3:0> = 100x.

DS41412A-page 28

Preliminary

 2010 Microchip Technology Inc.

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