PIC16F616 Microchip Technology Inc., PIC16F616 Datasheet - Page 27

• Manufacturer Part Number: PIC16F616
• Description: 14-pin Flash-based, 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

3.0
3.1
The Oscillator module has a wide variety of clock
sources and selection features that allow it to be used
in a wide range of applications while maximizing perfor-
mance and minimizing power consumption. Figure 3-1
illustrates a block diagram of the Oscillator module.
Clock sources can be configured from external
oscillators, quartz crystal resonators, ceramic resonators
and Resistor-Capacitor (RC) circuits. In addition, the
system clock source can be configured with a choice of
two selectable speeds: internal or external system clock
source.
FIGURE 3-1:
© 2007 Microchip Technology Inc.
OSC2
OSC1
OSCILLATOR MODULE
Overview
External Oscillator
PIC
®
INTOSC
8 MHz
MCU CLOCK SOURCE BLOCK DIAGRAM
Internal Oscillator
Sleep
Postscaler
4 MHz
PIC16F610/616/16HV610/616
Preliminary
The Oscillator module can be configured in one of eight
clock modes.
1.
2.
3.
4.
5.
6.
7.
8.
Clock Source modes are configured by the FOSC<2:0>
bits in the Configuration Word register (CONFIG). The
Internal Oscillator module provides a selectable system
clock mode of either 4 MHz (Postscaler) or 8 MHz
(INTOSC).
LP, XT, HS, RC, RCIO, EC
EC – External clock with I/O on OSC2/CLKOUT.
LP – 32 kHz Low-Power Crystal mode.
XT – Medium Gain Crystal or Ceramic Resonator
Oscillator mode.
HS – High Gain Crystal or Ceramic Resonator
mode.
RC – External Resistor-Capacitor (RC) with
F
RCIO – External Resistor-Capacitor (RC) with
I/O on OSC2/CLKOUT.
INTOSC – Internal oscillator with F
on OSC2 and I/O on OSC1/CLKIN.
INTOSCIO – Internal oscillator with I/O on
OSC1/CLKIN and OSC2/CLKOUT.
OSC
/4 output on OSC2/CLKOUT.
INTOSC
(Configuration Word Register)
FOSC<2:0>
IOSCFS
(CPU and Peripherals)
DS41288C-page 25
System Clock
OSC
/4 output