PIC16F689-I/SS
8-bit PIC microcontrollers with flash memory, SSOP20 package
Manufacturer： microchip
series introduction
# PIC16F689 - I/SS Product Series Introduction
## 1. Overview
The PIC16F689 - I/SS is part of Microchip Technology's PIC16F family of 8 - bit microcontrollers. These microcontrollers are known for their high - performance, low - cost, and low - power consumption characteristics, making them suitable for a wide range of embedded applications. The "I/SS" in the part number typically refers to a specific package option and other associated features that are optimized for certain design requirements.
## 2. Key Features
### 2.1 CPU and Memory
- **CPU Core**: It is based on a high - performance RISC (Reduced Instruction Set Computing) CPU. This architecture allows for a fast execution of instructions, with most instructions being executed in a single cycle. The CPU has a wide range of addressing modes and a rich instruction set, enabling efficient programming for various tasks.
- **Program Memory**: The PIC16F689 - I/SS 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**: It has 256 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 Timers
- **Timer0**: This is an 8 - bit timer/counter with an 8 - bit prescaler. It can be used for a variety of timing functions, such as generating time delays, measuring time intervals, and as a real - time clock in simple applications.
- **Timer1**: A 16 - bit timer/counter with a prescaler and an external clock input option. Timer1 can be used for more precise timing requirements, such as in communication protocols that require accurate baud rate generation.
- **Timer2**: An 8 - bit timer/counter with a prescaler and a post - scaler. It is often used in conjunction with the PWM (Pulse Width Modulation) module to generate PWM signals with different duty cycles.
#### 2.2.2 Analog - to - Digital Converter (ADC)
The PIC16F689 - I/SS is equipped with a 10 - bit ADC. This ADC can convert analog input signals from up to 8 channels into digital values. It is useful in applications where analog sensor data needs to be processed, such as temperature sensing, light sensing, and pressure sensing.
#### 2.2.3 Comparators
It has two comparators that can be used for comparing two analog input voltages. Comparators are commonly used in applications such as voltage monitoring, level detection, and in some cases, for implementing simple control algorithms.
#### 2.2.4 Universal Synchronous Asynchronous Receiver Transmitter (USART)
The USART module allows the microcontroller to communicate with other devices using both synchronous and asynchronous serial communication protocols. This is useful for interfacing with devices such as computers, sensors, and other microcontrollers over serial communication links like RS - 232 or RS - 485.
#### 2.2.5 Pulse Width Modulation (PWM)
The PWM module can generate PWM signals with adjustable duty cycles. PWM signals are widely used in applications such as motor control, LED dimming, and power regulation.
### 2.3 Power Management
- **Low - Power Modes**: The PIC16F689 - I/SS supports multiple low - power modes, including Sleep mode
Images for reference
20-SSOP
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