Datasheet

PIC16(L)F1454/5/9
DS41639A-page 58 Preliminary  2012 Microchip Technology Inc.
FIGURE 5-1: SIMPLIFIED PIC
®
MCU CLOCK SOURCE BLOCK DIAGRAM
Primary
Oscillator
(OSC)
Secondary
Oscillator
(SOSC)
Postscaler
16 MHz
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz
250 kHz
125 kHz
62.5 kHz
31.25 kHz
31 kHz
to WDT, PWRT
and other Modules
Clock
Control
SCS<1:0>
FOSC<2:0>
CLKIN/ OSC1/
SOSCI/ T1CKI
CLKOUT / OSC2
SOSCO/ T1G
Primary Clock
Secondary Clock
INTOSC
IRCF<3:0>
Start-up
Control Logic
16 MHz
Internal OSC
31 kHz
Source
Start-Up
OSC
3
4
3x/4x PLL
FOSC<2:0>
3
LFINTOSC
HFINTOSC
2
SPLLEN
PLLEN
Active Clock
Tuning
SOSC_clk
Sleep
PLLMULT
INTOSC
(16 or 8 MHz)
LFINTOSC
SPLLMULT
FOSC
to
CPU and
Peripherals
CPU
Divider
CPUDIV<1:0>
USBLSCLK
USB
Divider
1
0
USB
Clock
Source
1
0
FSEN
48 MHz
6 MHz