Datasheet

 2011 Microchip Technology Inc. Preliminary DS41585A-page 27
PIC10(L)F320/322
4.0 OSCILLATOR MODULE
4.1 Overview
The oscillator module has a variety of clock sources and
selection features that allow it to be used in a range of
applications while maximizing performance and
minimizing power consumption. Figure 4-1 illustrates a
block diagram of the oscillator module.
The system can be configured to use an internal
calibrated high-frequency oscillator as clock source, with
a choice of selectable speeds via software.
Clock source modes are configured by the FOSC bit in
Configuration Word (CONFIG).
1. EC oscillator from CLKIN.
2. INTOSC oscillator, CLKIN not enabled.
FIGURE 4-1: PIC10(L)F320/322 CLOCK SOURCE BLOCK DIAGRAM
HFINTOSC
16 MHz
HFIOFR
(1)
HFIOFS
(1)
Divider
16 MHz
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz
250 kHz
MUX
111
110
101
100
011
010
001
LFINTOSC
31 kHz
000
IRCF<2:0>
INTOSC
LFIOFR
(1)
CLKIN
EC
MUX
FOSC
(Configuration
Word)
System Clock
(CPU and
Peripherals)
CLKROE
CLKR
31 kHz
0
1
3
Note 1: HFIOFR, HFIOFS and LFIOFR are Status bits in the OSCCON register.