Datasheet

PIC12(L)F1571/2
DS40001723D-page 48  2013-2015 Microchip Technology Inc.
FIGURE 5-1: SIMPLIFIED PIC
®
MCU CLOCK SOURCE BLOCK DIAGRAM
Rev. 10-000155A
10/11/2013
31 kHz
Oscillator
Prescaler
HFINTOSC
(1)
16 MHz
8 MHz
4 MHz
2 MHz
1 MHz
*500 kHz
*250 kHz
*125 kHz
62.5 kHz
*31.25 kHz
*31 kHz
IRCF<3:0>
4
INTOSC
to CPU and
Peripherals
Sleep
F OSC
(1)
LFINTOSC
(1)
to WDT, PWRT, and
other Peripherals
* Available with more than one IRCF selection
SCS<1:0>
2
600 kHz
Oscillator
FRC
(1)
to ADC and
other Peripherals
CLKIN
1
0
4x PLL
(2)
HFPLL
16 MHz
500 kHz
Oscillator
MFINTOSC
(1)
Internal Oscillator
Block
to Peripherals
PLLEN
SPLLEN
FOSC<1:0>
2
00
1x
01Reserved
Note 1: See Section 5.2 “Clock Source Types”.
2: ST Buffer is high-speed type when using T1CKI.
3: If FOSC<1:0> = 00, 4x PLL can only be used if IRCF<3:0> = 1110.