Microprocessors and Microcontrollers Reference Materials

Description: This application note demonstrates a simple bootloader implementation for the PIC18F families of microcontrollers with a CAN module. The goals of this implementation are to stress maximum performance ...

Description: Power consumption has always been an important consideration for the design of any electrical system. This includes the embedded systems at the heart of countless modern devices and the ...

Description: This application note is an addendum to the information in the previous capacitive touch sensing application notes, found on Microchip's web site. It builds specifically on AN1101, "Introduction to ...

Description: This application note explains how to use the Microchip Capacitive touch Simulation Tool to customize sensing algorithms to a project's specific needs. It also helps determine the level of algorithm ...

Description: This application note describes a new hardware sensing method called Capacitive Voltage Divider (CVD) which uses no external components. ...

Description: Many Microchip microcontrollers have internal circuitry to drive a 32.768 kHz external crystal to provide an asynchronous clock signal to the Timer1 internal counter. Timer1 is a 16-bit counter which ...

Description: The reference design in this This application note focuses on the design of an Interleaved Power Factor Correction (IPFC) converter. It explains the digital implementation of the IPFC on a 16-bit ...

Description: This application note covers the general concept, design and some source code modifications for using the MCP1631HV Digitally Controlled Programmable Current Source Reference Design for an LED ...

Description: This application note examines the reasons for migrating to a RTOS-based platform. It then discusses the various changes that may be required to one?s software in order to use an RTOS. When discussing ...

Description: This technical brief will describe in detail how the IOC interrupt may be missed depending on when the change event takes place in relation to the clock cycle. ...

Description: This application note describes a KEELOQ® with XTEA (Tiny Encryption Algorithm Version 2)encryption algorithm code hopping decoder implemented on a Microchip Mid-range Enhanced Flash MCU ...

Description: This application note is developed based on low latency design. It provides an algorithm, which is designed to use the SPI/I2C interrupts, to achieve the required communication and enable optimum ...

Description: Low frequency magnetic communications (LFMC) is a viable ?wireless? communications alternative to traditional radio frequency (RF) or Infrared communications. It is well suited for certain ...

Description: This technical brief describes a small application that demonstrates the low-power capacitive touch potential of the Capacitive Sensing Module (CSM). The main benefit of this new part is the ...

Description: The reference design in this application note describes the design of an Offline Uninterruptible Power Supply (UPS) using a Switch Mode Power Supply (SMPS) dsPIC® Digital Signal Controller (DSC). ...

Description: This application note discusses how the PIC® MCU can serve as the horn driver by merely using a couple of peripherals. This application note also discusses the implementation of those peripherals ...

Description: This application note describes a sensorless FOC algorithm for PMSM motors using a Phase-Locked Loop (PLL) position and speed estimator. ...

Description: This application note describes a new hardware sensing method which is resilient to water drops appearing on the surface of the touch sensing area. In other touch systems, a drop of water will act in ...

Description: The MCP3551 delta-sigma ADC is a high-resolution converter. This application note discusses various design techniques to follow when using this device. Typical application circuits are discussed ...

Description: Many of Silicon Lab's devices feature an on-chip SAR analog-to-digital converter (ADC). These ADC's use a sample capacitor that is charged to the voltage of the input signal that is used by the SAR ...

Description: Bridge transducers are the most common sensor type in digital counting scales. They convert a force into a voltage that is proportional to the force applied to the bridge. Bridge transducers are used ...

Description: Magnetic stripe readers (MSRs) are widely used in many different applications such as point-of-sale terminals and key card readers. The C8051F330 is capable of integrating MSR functionality in a very ...

Description: C8051F3xx and C8051F41x devices are equipped with an SMBus serial I/O peripheral that is compliant with both the System Management Bus Specification and the I2C-Bus Specification. The SMBus is a ...

Description: The information in this document and the associated software download is intended for use by developers creating USB products based on the CP210x USB to UART Bridge Controller device family or the ...

Description: Driven by the need for untethered mobility and ease of use, many systems rely on rechargeable batteries as their primary power source. The battery charger is typically implemented using a ...

Description: Many applications require measurements using an analog-to-digital converter (ADC). Such applications will have resolution requirements based in the signal's dynamic range, the smallest change in a ...

Description: Among the USB device classes natively supported by popular operating systems, the USB Mass Storage Device (MSD) class is one of the most widely supported device classes. A USB device that supports ...

Description: Digital signal processing algorithms are powerful tools that provide algorithmic solutions to common problems. For example, digital filters provide several benefits over their analog counterparts. ...

Description: The WDT timer is a simple RC timer with a typical time-out period of about 18 ms. This time-out period is dependent on Voltage, Temperature and Silicon process variations. Hence the tolerance on the ...

Description: This application note explains the design of transponder coils. An Excel spreadsheet is used to automate the update of values, depending on the specified parameters. The spreadsheet file name is ...

Description: This application note describes the working of a KEELOQ® code hopping decoder implemented on a Microchip Midrange MCUs (PIC16C6X, PIC16C7X, PIC16C62X) ...

Description: The PIC16C5X has one 8-bit timer (Timer0) which can use an 8-bit prescaler. In some instances, the user would like to use this timer for some other purpose and yet, be able to do a transmit and ...

Description: Many potential customers of the 24LC00 have expressed interest in the device, especially with it available in the ultra-small SOT-23 package. The one thing that has kept customers from designing in or ...

Description: This technical brief describes how to use the PIC16C72 PICMASTER emulator probe for PIC12C67X emulation. ...

Description: he MCP2510 is a low pincount stand-alone CAN controller which interfaces to a microcontroller via a standard Serial Peripheral Interface (SPI?). The feature set of the MCP2510 makes it very versatile. ...

Description: This application note demonstrates the use of a PIC17C756A microcontroller (MCU) in a brush-DC servomotor application. The PIC17CXXX family of micro-controllers makes an excellent choice for ...

Description: This application note describes the Cyclic Redundancy Check (CRC) theory and implementation. The CRC check is used to detect errors in a message. Two implementations are shown: Table driven CRC ...

Description: Many people carry one or more magnetically encoded cards with them for accessing a range of services. Perhaps the most common example is the credit card or bank ATM card, but increasingly they are ...

Description: In many applications, a DC/DC Converter is used to produce a regulated voltage or current, derived from an unregulated power supply, or from a battery. Examples of these applications include battery ...

Description: An Analog-to-Digital (A/D) converter translates an analog input signal into a discrete digital code. This digital representation of the real world signal can be manipulated in the digital domain for ...

Description: The release of the PIC16F87X devices introduces the first mid-range family of devices from Microchip Technology that has the capability to read and write to internal program memory. This family has ...

Description: One very common and relatively quick method for finding the square root of a number is the Newton-Raphson method. Although this method is quick in terms of mathematics, it also requires extensive use ...

Description: One very common and relatively quick method for finding the square root of a number is the Newton-Raphson method. Although this method is quick in terms of mathematics, it also requires extensive use ...

Description: It is often necessary to output a floating point number to a display. For example, to check calculations, one might want to output floating point numbers using the PICmicro ® microcontrollers ...

Description: In-Circuit Serial Programming (ICSP?) is a great way to reduce your inventory overhead and time-to-market for your product. By assembling your product with a blank Microchip microcontroller (MCU), you ...

Description: The PIC16F87X family of microcontrollers has the ability to write to their own program memory. This feature allows a small bootloader program to receive and write new firmware into memory. This ...

Description: The PIC18C601 and PIC18C801 microcontrollers are the first members of Microchips PIC18 family with no on-chip program memory. They offer the PIC18 architecture, with the ability to use different types ...

Description: The PIC18C601 and PIC18C801 microcontrollers are the first members of Microchips PIC18 family with no on-chip program memory. They offer the PIC18 architecture, with the ability to use different types ...

Description: The PIC18C601 and PIC18C801 are the very first members of Microchips PIC18 family that are ROMless microcontrollers that is, they have no on-chip program memory. Both offer the enhanced PIC18 ...

Description: Many embedded control applications, where sensor offsets, slopes and configuration information are measured and stored, require a calibration step. Traditionally, potentiometers or Serial EEPROM ...

Description: In embedded controller applications, it is often desirable to provide a means to digitize analog signals. The MCP3201 12-bit Analog-to-Digital (A/D) Converter gives the designer an easy means to add ...

Description: The MCP41XXX and MCP42XXX family of digital potentiometers communicate using a standard 3-wire SPI compatible interface. This application note will cover communication between these devices and the ...

Description: The MCP41XXX and MCP42XXX family of digital potentiometers communicate using a standard 3-wire SPI compatible interface. This application note will discuss communications between these devices and a ...

Description: Many of the embedded control systems designed today require some flavor of Analog-to-Digital (A/D) Converter. Embedded system applications such as Data Acquisition, Sensor Monitoring, and ...

Description: This document describes a secure transponder system. The system is suitable for use in security applications such as cars, motor bikes, and scooters (two-wheelers). Microchip?s secure HCS410 KEELOQ ...

Description: LIN Protocol was designed by a consortium of European auto manufacturers as a low cost, short distance, low speed network. Designed to communicate changes in switch settings and respond to switch ...

Description: This application note uses the Timer1 module, from a mid-range PIC16CXXX microcontroller, to control a low-power real-time clock. Timer1 was chosen because it has its own crystal which allows the ...

Description: This application note describes how to implement an Analog-to-Digital (A/D) Converter function using a member of the PIC16C6XX series of microcontrollers. Although these microcontrollers do not have a ...

Description: This application note describes how to implement an Analog-to-Digital (A/D) Converter function using a member of the PIC16C6XX series of microcontrollers. Although these microcontrollers do not have a ...

Description: The PIC18CXX2 was intended to make conversions from midrange controllers to enhanced controllers as easily as possible. Changes to register and bit names, and bit locations were kept to a minimum. The ...

Description: This application note covers a Real-Time Operating System (RTOS) running on a PIC16F877. The application is written in C using the HI-TECH C compiler. MPLAB ® IDE is used as the Integrated ...

Description: The specification of the PIC18CXXX Architecture was done with several goals. One of the most important of these goals was code compatibility with existing PICmicro ® families. This goal eases the ...

Description: The PICmicro ® microcontroller makes an ideal choice for an embedded DC Servomotor application. The PICmicro family has many devices and options for the embedded designer to choose from. ...

Description: This application note describes an implementation of a RS-232 Autobaud routine on a PIC16C54B microcontroller. Many microcontroller applications require chip-to-chip serial communication. Since the ...

Description: The PIC17CXXX family of PICmicro ® microcontrollers has an external program memory interface. Since the PIC17CXXX devices implement a 16-bit instruction word, the external memory must be 16-bits ...

Description: This application note discusses the organization of the PICmicro MCU and related firmware for developing IEEE 1451.2 Smart Transducer Interface Modules (STIM). Although a detailed understanding of the ...

Description: The purpose of this application note is to describe the specifications used to quantify the performance of A/D converters and give the reader a better understanding of the significance of those ...

Description: This application note will focus on the details of negotiating PPP. ...

Description: PIC16C64/74 microcontrollers from Microchip Technology Inc. can be interfaced with ease into a multi-microprocessor environment using its built-in Parallel Slave Port (PSP). With their very high ...

Description: The MCP320X devices comprise a family of 12-bit successive approximation Analog to Digital (A/D) Converters. These devices provide from one to eight analog inputs with both single ended and ...

Description: Many devices in the PICmicro family have a Synchronous Serial Port (SSP) or Master Synchronous Serial Port (MSSP). These peripherals can be used to implement the SPI TM or I 2 C communication ...

Description: This application note discusses the use of the PIC16CXXX Timer1 module as an asynchronous clock. The Timer1 module has it own oscillator circuitry, which allows the timer to keep real-time, even when ...

Description: This application note discusses the use of the PIC16CXXX Timer1 module as an asynchronous clock. The Timer1 module has it own oscillator circuitry, which allows the timer to keep real-time, even when ...

Description: This application note shows how to use a PIC16C923 microcontroller to control operation of the CS5460 power measurement integrated circuit from Cirrus Logic ® /Crystal Power Measurement, to drive ...

Description: This application note describes a Microchip system solution for a low end/power wireless home security system. This design implements an HCS200 encoder for the intruder sensor signal encryption, one ...

Description: A 15kg weighing scale was designed using Microchip's TC500A Analog Processor and the TC520 16-bit Controller. The scale is required to resolve down to 1/8 gram and correct to within 61/2 gram. This ...

Description: This application note describes the design, development and implementation of a smart, low cost, stand alone Controller Area Network (CAN) node. It combines the Microchip 8-pin PIC12C672 ...

Description: Simple Network Management Protocol (SNMP) is an Internet protocol that was originally designed to manage different network devices, such as file servers, hubs, routers and so on. It can also be used ...

Description: Simple Network Management Protocol (SNMP) is an Internet protocol that was originally designed to manage different network devices, such as file servers, hubs, routers and so on. It can also be used ...

Description: Recently, Microchip has introduced a series of new PIC16 and PIC18 PICmicro® microcontrollers that have an on-board Internal RC Oscillator, capable of eight frequencies from 31 kHz to 8 MHz. ...

Description: Many PICmicro microcontroller devices have a builtin USART and it is one of the most commonly used serial interface peripherals. It is also known as the Serial Communications Interface, or SCI. The ...

Description: The oscillator circuit is one of the most overlooked areas of microprocessor circuit design. Components are usually selected based on the manufacturers tables. If the circuit starts up and works, ...

Description: The oscillator circuit is one of the most overlooked areas of microprocessor circuit design. Components are usually selected based on the manufacturers tables. If the circuit starts up and works, ...

Description: The oscillator circuit for almost any microcontroller is a fairly simple design with very few components. Selecting the values for capasitors and resistors from the manufacturer's data books will get ...

Description: This technical brief describes how a PICmicro microcontroller can be made to run with bipolar power. The PICmicro microcontroller can even generate its own negative power supply with no software ...

Description: This technical brief describes how a PICmicro microcontroller can be made to run with bipolar power. The PICmicro microcontroller can even generate its own negative power supply with no software ...

Description: Resistive sensors configured as Wheatstone bridges are primarily used to sense pressure, temperature or loads. An external A/D converter (ADC) and a digitally Programmable Gain Amplifier (PGA) can ...

Description: The PIC16C74 is one of the latest mid-range microcontrollers from Microchip Technology Inc. In this article we will be addressing a few of the new features and peripherals of this new part. The main ...

Description: The MCP3221 12-bit A/D Converter (ADC) communicates using a standard 2-wire I2C compatible interface. This application note will cover communications between this device and a PICmicro ...

Description: The MCP3221 12-bit A/D Converter (ADC) communicates using a standard 2-wire I2C compatible interface. This application note will cover communications between this device and a PICmicro ...

Description: This application note describes how to connect a PICmicro microcontroller device to a standard analog telephone line in order to send and receive single and multiple frequency signals through ...

Description: When migrating assembly language programs from one family of microcontrollers to another, the first question is almost always: ?What?s the equivalent opcode?? Some operations, like addition and ...

Description: This application note describes the design of a singleended loop antenna for rfPIC12F675 transmitters. The PCB design will cover all 3 frequency bands from 290 MHz through 930 MHz with a few component ...

Description: It is the responsibility of engineers to get the most performance and capability out of the resources available. In this application note, we present ideas that have helped previous designs reduce ...

Description: This document describes how to modify the PICDEM LIN for use with a MCP201. The PICDEM LIN is equipped with an engineering version of the Microchip LIN bus transceiver. The transceiver can be replaced ...

Description: The Microchip PICmicro® PIC18 family of microcontrollers are popularly known for their logic and controlling functions. In addition, these microcontrollers have built-in hardware multipliers and ...

Description: Today, design engineers rely more on microprocessors and microcontrollers to support their applications. Compatible analog-to- digital (A/D) and digital-to-analog (A/D) converters have greatly ...

Description: Microchip's TC642, TC643, and TC646 are the world's first integrated circuits dedicated for controlling and monitoring fan speed. The new family of fan speed controllers modulate fan speed to ...

Description: This application note describes how to use a PIC16F877A as an I2C master to communicate with the Microchip MCP23016 I2C I/O Expander slave device. ...