PIC16F15213 datasheet(77/439 Pages) MICROCHIP

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11.

OSC - Oscillator Module

11.1

Oscillator Module Overview

The oscillator module contains multiple clock sources and selection features that allow it to be used in a wide range

of applications while maximizing performance and minimizing power consumption.

Clock sources can be supplied either internally or externally. External sources include:

• External Clock (EC) oscillators

Internal sources include:

• High-Frequency Internal Oscillator (HFINTOSC)

• Low-Frequency Internal Oscillator (LFINTOSC)

• Analog-to-Digital Converter RC Oscillator (ADCRC)

Special features of the oscillator module include:

• HFINTOSC Frequency Adjustment: Provides the ability to adjust the HFINTOSC frequency.

The Reset Oscillator (RSTOSC) Configuration bits determine the type of oscillator that will be used when the device

runs after a Reset, including when the device is first powered up (see the table below).

Table 11-1. RSTOSC Selection Table

RSTOSC

SFR Reset Values

Clock Source

COSC

OSCFRQ

000

EXTOSC per FEXTOSC

HFINTOSC @ 1 MHz

LFINTOSC

101

HFINTOSC @ 32 MHz

If an external clock source is selected by the RSTOSC bits, the External Oscillator Mode Select (FEXTOSC)

Configuration bits must be used to select the external clock mode. These modes include:

• ECL: External Clock Low Power mode

• ECH: External Clock High Power mode

The ECH and ECL modes rely on an external logic-level signal as the device clock source. Each mode is optimized

for a specific frequency range. The internal oscillator block produces both low-frequency and high-frequency clock

signals, designated LFINTOSC and HFINTOSC, respectively. Multiple system operating frequencies may be derived

from these clock sources.

Figure 11-1 illustrates a block diagram of the oscillator module.

PIC16F15213/14/23/24/43/44

OSC - Oscillator Module

and its subsidiaries

Data Sheet

DS40002195E-page 77

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