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E Text Script for eLearning course "Oscillators" Table of contents Topic Slide Number Title Slide 1 Introduction 2 Oscillator Modes 3 High Speed 4 Standard Crystal 5 Knowledge Check #1 6 Low Power 7 External RC 8 Internal RC 9 External Resistor 10 Knowledge Check # 2 11 Closing Slide 12 Text script for "Oscillators" Page 1 of 6 *h Slide 1: Introduction Microchip Technology welcomes you to the Oscillator module of the PICmicro x14 microcontroller. This module will give you a basic overview, design tips and troubleshooting for PIC MCU Oscillators and is intended for those new to PIC MCUs or those requiring a refresher on PIC MCU Oscillators. It is recommended you have previously taken or are familiar with the PIC MCU x14 architecture and instruction set modules. Slide 2: Introduction The oscillator circuit in a PICmicro is what generates the system clock that is required by the MCU to run. While oscillator design and usage is simple in concept, selecting the wrong or unqualified oscillator for your application can lead to difficulties. This presentation explores these issues and the common oscillator modes and attributes so you will have a greater understanding of designing with oscillators on PIC MCUs. Slide 3: Oscillator Modes Overview There are 4 common oscillator modes that are available on PICmicro devices; HS, XT, LP and RC. These modes allow the user to create a clock by using crystals, canned oscillator modules, resonators, an RC circuit or even a single resistor. (add pictures of different clock sources) Some PICmicro devices also have the option of an internal RC oscillator. As you would expect, each of these modes has a different set of operating characteristics and constraints. The oscillator mode is set by the state of the configuration bits, which are non- volatile memory locations, and are written during device programming. These bits are set within the programmer software or by using the _config directive in your source code. Please note here that the config directive has 2 underscore characters, not one. It should be noted here that no matter what oscillator mode you choose to use, is very important that your design is tested thoroughly to make sure it is