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Posts Tagged ‘NXP’

MQTT with lwip and NXP FRDM-K64F Board

Friday, April 14th, 2017

Erich Styger from MCU on Eclipse writes, "In this article I show the basic steps to get MQTT running on the NXP FRDM-K64F board using MCUXpresso IDE, lwip and MQTT. lwip ois a small and open source TCP/IP stack which is widely used. To keep things very simple in this first...

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App note: Using touch interface in harsh environments

Sunday, February 12th, 2017

Tough design and software reference from NXP of touch interface. Link here (PDF) The touch-sensing method is used to replace most of traditional tact switch inputs as a new type of human-machine interface used in home-appliance applications. However, using such kind of detection method in harsh environment is still a...

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App note: Water level monitoring

Sunday, February 12th, 2017

A reference design from NXP about water level detection using pressure sensor. Link here (PDF) Many washing machines currently in production use a mechanical sensor for water level detection. Mechanical sensors work with discrete trip points enabling water level detection only at those points. The purpose for this reference design...

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App note: UHF RFID label antenna design

Saturday, November 5th, 2016

UHF label antenna design guide from NXP, app note here (PDF!) This document provides a general overview on basics of UHF wave propagation, as well as practical considerations of UHF label antenna design. The target is to guide the reader to a good understanding of UHF label antenna design in theory...

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App note: Embedded orientation detection using the MMA8450Q

Sunday, October 23rd, 2016

NXP's accelerometer chip MMA8450Q, provides orientation detection on handheld devices. Link here (PDF) This application note targets the portrait/landscape orientation detection feature which has become standard in many hand-held electronic devices. Additionally, this application note aims to explain uses as well as highlight some of the challenges of designing an...

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App note: Thermal behavior of small-signal discretes on multilayer PCBs

Sunday, January 31st, 2016

App note from NXP Semiconductors about multilayer PCB as additional heatsink for flat SMD components mostly power transistors to dissipate heat. Link here (PDF) This application note illustrates how to improve the power dissipation of discrete components by using multilayer PCBs. It focuses on the impact of using larger copper...

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App note: Medium power small-signal MOSFETs in DC-to-DC conversion

Sunday, January 25th, 2015

App note(PDF) from NXP on DC-DC medium power small-signal MOSFETs. This application note explores different methods of DC-to-DC conversion. It includes some examples of DC-to-DC down-converters using small-signal MOSFETs.

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App note: SD(HC)-memory card and MMC interface conditioning

Sunday, January 25th, 2015

An ESD and EMI protection app note(PDF) from NXP for SD and MMC memory interfaces. This document gives an overview about different ESD protection and EMI filter devices optimized for SD-memory card and MMC interfaces. These devices cover the range from 1-bit to current standard 4-bit (SD-memory card, SD 2.0)...

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App note: How to design in and program the PCA9641 I2C arbiter

Sunday, November 2nd, 2014

I2C arbiter chip application(PDF) from NXP. The PCA9641 is highly integrated and smart design for 2-1 I2C-bus multiplexer. It is used in a system that needs two masters sharing the same slave devices. The internal switch is programmed by the masters but it will not switch in a middle of...

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App note: ESD and EMC sensitivity of IC

Sunday, September 28th, 2014

A good beginner app note (PDF) from NXP on protecting ICs from ESD. Integrated circuits are sensitive to electrostatic discharge (a sudden and short-time flow of currents) and electromagnetic fields (at which they can be source or victim of both of it). This application note shall be understood as an...

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App note: Power losses and junction temperatures on parallel Schottkys as secondary rectifiers in flyback adapter

Sunday, September 28th, 2014

Parallel Schottkys performance over single Shottkys app note (PDF) from NXP This document gives an overview of power losses and the consequential junction temperature rise of two parallel Schottkys as secondary side rectifiers in flyback power adapters with up to 12.5 W output power. The focus is set on a...

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App note: Sorting through the low voltage logic maze

Saturday, August 23rd, 2014

Here's how to guide (PDF) from NXP in choosing the right standard logic from various choices that fit your application. Digital systems are running at faster speeds, operating at lower voltages, and they are becoming more highly integrated. Many functions can be integrated into FPGAs or ASICs, however, this does...

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App note: Low Voltage Agile I/O GPIO Input/Output Characteristics

Saturday, August 23rd, 2014

App note (PDF) on NXP's Agile I/O expander, discussing its capabilities and how to use it efficiently. I2C-bus GPIO devices are widely used and expand a control processor’s pins to 8-, 16- or 24- bits of general-purpose input or output. The characteristic of these I/O needs to be accurately known...

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An open letter to NXP Semiconductors about LPC1114FN28

Friday, July 25th, 2014

ytsuboi  wrote an open letter to CEO of NXP, and get replied: I sent this e-mail to the CEO of NXP Semiconductors. (23 July 2014, 4:36am JST) To: NXP Semiconductors N.V‎ Richard L. Clemmer, Executive Director, President and CEO Dear Mr. Clemmer, About a week ago, I found an unbelievable information about...

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Posted in ARM | 3 Comments »

App note: Water and condensation safe touch sensing with the NXP capacitive touch sensors

Sunday, July 6th, 2014

  App note (PDF) from NXP on water and condensation resistant capacitive touch sensors. This application note explains the unique auto-calibration feature of the touch sensor family from NXP and provides guidelines for enhanced water and condensation safe operation, focusing on applications with capacitive touch buttons.

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App note: NXP Smartphone Quick-Jack Solution

Sunday, June 22nd, 2014

An interesting app note (PDF) from NXP where you can interface your mobile phone with a microcontroller via the audio 3.5mm jack. Inspired by the University of Michigan's Project HiJack, the NXP Smartphone Quick-Jack Solution repurposes the standard 3.5mm stereo audio jack found on most smartphones into a self-powered data...

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App note: Sending I2C-bus signals via long communications cables

Sunday, June 22nd, 2014

Extend I2C communication distance with this app note (PDF) from NXP. Reliable I2C-bus communication at high data rates, and over many meters, can be achieved using widely available twisted- pair communication cable (e.g. Category 5e and similar 4-pair cables, as typically used for Ethernet communications). The two bidirectional I2C-bus signals,...

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App note: Cascading NXP LCD segment drivers

Sunday, March 2nd, 2014

A great app note from NXP on cascading multiple LCD driver to work as one large display. This application note aims to assist designers using NXP LCD segment drivers in making a cascaded design. Cascading means combining more than one LCD driver in a design in such a way that...

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App note: Guidelines for full-speed USB on NXP’s LPC microcontrollers

Sunday, March 2nd, 2014

Hook up your LPC microcontrollers using USB full-speed connectivity using these guidelines from NXP app note Full-speed USB operates at 12 Mb/s, and although this is not a high data rate, observing some basic rules or guidelines will usually guarantee successful operation. This application note highlights some of the more...

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App note: microcontrollers and triacs easily connected

Sunday, February 9th, 2014

Here's an application note from NXP on how to easily connect main triacs and microcontrollers. This application note describes the easy connection of NXP LPC microcontrollers and three - quadrant (Hi-Com) triacs to control any resistive or inductive load at mains voltage. A one-for-all control method is presented that uses...

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