PIC16F819-I/SS

series introduction

# Introduction to the PIC16F819 - I/SS Product Series

## 1. Overview
The PIC16F819 - I/SS is a member of Microchip Technology's popular PIC16F microcontroller family. Renowned for its reliability, efficiency, and versatility, this product series is designed to meet a wide range of embedded system applications. The "I/SS" in the part number typically indicates a specific package type and temperature range, which in this case is a small - outline surface - mount package, making it suitable for space - constrained designs.

## 2. Key Features

### 2.1 CPU and Memory
- **CPU Performance**: The PIC16F819 is powered by a high - performance RISC (Reduced Instruction Set Computing) CPU. It has a Harvard architecture, which separates the data and instruction buses, allowing for simultaneous access to program and data memory. This results in faster execution of instructions and improved overall performance.
- **Program Memory**: It comes with 4KB of Flash program memory. Flash memory is non - volatile, which means that the program code stored in it is retained even when the power is turned off. This allows for easy reprogramming during development and in - field updates if required.
- **Data Memory**: The microcontroller has 128 bytes of RAM (Random Access Memory). RAM is used for storing temporary data during the execution of the program, such as variables, intermediate results, and stack operations.

### 2.2 Peripherals

#### 2.2.1 Timer/Counters
- **Timer0**: This is an 8 - bit timer/counter with an 8 - bit prescaler. It can be used for a variety of timing applications, such as generating time delays, measuring time intervals, and implementing simple real - time clocks.
- **Timer1**: A 16 - bit timer/counter that can be configured to operate in either timer or counter mode. It can be used in conjunction with an external crystal oscillator for more accurate timing, making it suitable for applications like frequency measurement and pulse - width modulation (PWM) generation.
- **Timer2**: An 8 - bit timer/counter with a 16 - bit period register. It is often used for generating PWM signals with variable duty cycles, which are useful in applications such as motor control and LED dimming.

#### 2.2.2 Analog - to - Digital Converter (ADC)
The PIC16F819 features a 10 - bit ADC with up to 5 input channels. This allows the microcontroller to convert analog signals from sensors (such as temperature sensors, light sensors, and pressure sensors) into digital values that can be processed by the CPU. The ADC has a fast conversion time, enabling real - time monitoring and control of analog signals.

#### 2.2.3 Universal Synchronous/Asynchronous Receiver/Transmitter (USART)
The USART module provides serial communication capabilities, allowing the PIC16F819 to communicate with other devices such as computers, sensors, and actuators. It supports both synchronous and asynchronous communication modes, making it compatible with a wide range of serial communication protocols, including RS - 232 and SPI.

#### 2.2.4 Comparators
There are two analog comparators on the PIC16F819. These comparators can be used to compare two analog voltages and generate a digital output based on the comparison result. They are useful in applications such as voltage monitoring, level detection, and signal conditioning.

### 2.3 Low - Power Operation
The PIC16F819 is designed to operate with low power consumption, making it suitable for battery - powered applications. It has multiple power - saving modes, including Sleep mode,

Images for reference

20-SSOP

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Datasheets

• PDF 1
• PDF 2

Partlist