PIC18F23K22 Datasheet, PDF (28/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP 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.
DS41412B-page 28
Preliminary
 2010 Microchip Technology Inc.