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Posts Tagged ‘atmel’

App note: Differences between ATmega328/P and ATmega328PB

Sunday, May 1st, 2016

Differences between ATmega328/P and ATmega328PB (PDF!) application note from Atmel: This application note assists the users of Atmel® ATmega328 variants to understand the differences and use Atmel ATmega328PB. ATmega328PB is not a drop-in replacement for ATmega328 variants, but a new device. However, the functions are backward compatible with the existing...

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Olympus RS-24 foot pedal mod

Thursday, August 27th, 2015

Rupert Hirst writes: For a while now, I have been toying with the idea of modifying a transcriber foot pedal into a programmable HID device. This could be useful for those complicated keyboard macros , Push to Talk  or even for a more natural feel in racing type games, although...

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Atmel releases new low power MCUs

Monday, December 8th, 2014

Atmel recently announced the release of their next generation of low power 8-bit MCUs. Promising to be pin compatible with previous ATmega family members, these "The Atmel mega168PB, mega88PB and mega48PB are available in 32-pin QFN and QFP packages with additional devices available later this year. All devices are sampling...

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Posted in AVR, dev boards | 7 Comments »

App note: Calibration of the AVR’s internal temperature reference

Saturday, November 29th, 2014

Another app note from Atmel, calibration of the AVR's internal temperature reference (PDF!) This application note describes how to calibrate and compensate the temperature measurements from the ATtiny25/45/85. It can also be used on other AVR® microcontrollers with internal temperature sensors. The temperature measurement is based on an on-chip temperature sensor that...

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App note: Voltage reference calibration and voltage ADC usage

Saturday, November 29th, 2014

An app note from Atmel,  voltage reference calibration and voltage ADC usage (PDF!): Features • Voltage reference calibration. - 1.100V +/-1mV (typical) and < 90ppm/°C drift from –10°C to +70°C. • Interrupt controlled voltage ADC sampling. • Calculation of voltage and temperature from voltage ADC measurements. Some of the new Atmel...

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App note: Digital sound recorder with AVR and DataFlash

Saturday, November 22nd, 2014

An app note from Atmel, digital sound recorder with AVR and DataFlash (PDF!): This application note describes how to record, store and play back sound using any AVR microcontroller with A/D converter, the AT45DB161B DataFlash memory and a few extra components. This application note shows in detail the usage of the A/D Converter for...

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App note: Using the USI module as a I2 C master

Saturday, November 1st, 2014

This application note (PDF) from Atmel describes the implementation of a TWI master: The Two-wire serial Interface (TWI) is compatible with Philips' I2C protocol. The bus was developed to allow simple, robust and cost effective communication between integrated circuits in electronics. The strengths of the TWI bus includes the capability of...

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App note: 8-bit RISC microcontroller

Saturday, October 25th, 2014

Here's an app note (PDF!) for In-System Programming Solution for AVR microcontrollers from Atmel: Features • Complete In-System Programming Solution for AVR Microcontrollers • Covers All AVR Microcontrollers with In-System Programming Support • Reprogram Both Data Flash and Parameter EEPROM Memories • Complete Schematics for Low-cost In-System Programmer • Simple Three-wire SPI...

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App note: Using the AVR’s High-speed PWM

Saturday, July 26th, 2014

Atmel's app note on using the AVR’s High-speed PWM (PDF!): This application note is an introduction to the use of the high-speed Pulse Width Modulator (PWM) available in some AVR microcontrollers. The assembly code example provided shows how to use the fast PWM in the ATtiny26. The ATtiny15 also features a high-speed...

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Using the AVR hardware multiplier

Saturday, July 12th, 2014

Here’s how to use the hardware multiplier to make a multiply-and-accumulate operation (MAC), an app note from Atmel (PDF!): Features • 8- and 16-bit Implementations • Signed and Unsigned Routines • Fractional Signed and Unsigned Multiply • Executable Example Programs The megaAVR is a series of new devices in the AVR RISC...

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ATXMega Primer

Wednesday, June 25th, 2014

Shawon Shahryiar over at Embedded Lab talks about Atmel XMega in this tutorial: At present we have different families of XMega devices. Of these many we are focused toward the AU series only throughout this post and its following ones. I’ll explain later why I’m interested in this series. This is the first post...

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App note: EMC design considerations

Sunday, December 8th, 2013

Ever wonder why your project acts funny and sometimes causes unexpected outcome then one of these reasons are interference and how they inject into or emit from your designs. Learn more about EMC from Atmel's design consideration notes. The electromagnetic environment is getting tougher. High-frequency radio transmitters,  like mobile telephones,...

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App note: Long Delay Generation Using the AVR Microcontroller

Saturday, November 23rd, 2013

Here's an app note from ATMEL presenting a solution for microcontroller long delays. The solution presented here shows how the AVR AT90 series microcontrollers (AT90S2313, AT90S4414 and AT90S8515) generate and handle long delays. On-chip timers are used without any software intervention, thus allowing the core to be in a low-power...

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Atmel AVR Dragon hardware review

Thursday, August 8th, 2013

Kenneth Finnegan did a review of the Atmel AVR Dragon hardware:  One of my good friends at Atmel, Paul Rako, recently sent me a sample of the AVR Dragon (Atmel store page), which is a in-circuit serial programmer (ISP) and On-Chip Debugger (OCD). The ISP functionality is familiar to most...

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Posted in AVR | 9 Comments »

App note: Using the A/D Amplifier on AT90PWM

Saturday, July 27th, 2013

Here's an application note from Atmel for using the 10-bit ADC amplified conversion on AT90PWM (PDF!): ADC features on Atmel® AVR® AT90PWM devices: - 10-bit ADC amplified conversion with differential inputs - Programmable gain - Internal voltage reference The AT90PWM devices feature a 10-bit successive approximation ADC. The ADC is...

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App note: Using the XMEGA external bus interface

Sunday, July 21st, 2013

Here's an application note from Atmel describing how to use the external bus interface fount on the XMEGA series AVR microcontrollers. The XMEGA External Bus Interface (EBI) is a highly flexible module for interfacing external memories and memory addressable peripherals such as LCD controllers and advanced communication controllers. The EBI...

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App note: BLDC control with Hall effect sensors.

Sunday, July 14th, 2013

Here is an application note from Atmel based on sensor driven BLDC control implemented on AVR microcontrollers. This application note describes the control of a BLDC motor with Hall effect position sensors. The implementation includes both direction and open loop speed control.

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DIY RF Transceiver using MRF49XA and AT90USB162

Friday, July 12th, 2013

William Dillon has posted his initial work on a prototype USB RF data packet Transceiver dongle using the MRF49XA and an Atmel AT90USB162 micro controller. He embarked on a journey exploring the development of packet formats and protocols, as well as types of error correction. This open source project's details,...

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Posted in code, digital radio data, DIY, open source, RF | 1 Comment »

App note: Getting started guide for the Atmel Lightweight Mesh

Sunday, June 30th, 2013

Here's an getting started guide from Atmel describing their Lightweight Mesh wireless protocol. The purpose of this application note is to introduce users to the Lightweight Mesh network protocol stack and typical application development process from Atmel. This document describes how to start quickly with the Lightweight Mesh SDK, by...

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App note: Calibration of the ATtiny25/45/85 internal temperature reference

Sunday, June 23rd, 2013

Here is an app note from Atmel describing how to calibrate the ATtiny internal temperature reference. This application note describes how to calibrate and compensate the temperature measurements from the ATtiny25/45/85. It can also be used on other AVR microcontrollers with internal  temperature sensors. The temperature measurement is based on...

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