In the wireless industry, big marketing campaigns and massive media coverage
herald even relatively minor achievements. Not so for Near Field
Communications (NFC). Even though it’s used in dozens of applications
from contactless payment to healthcare, and billions of NFC ICs, readers and
tags are in use globally, studies continue to show that many, even very
inexpensive, products that could benefit from it have yet to do so.
Here’s a classic example from my own experience. This year, I added to
our family’s already extensive supply of Christmas decorations with a
set of five, 4-in. diameter white candles whose LEDs can be changed from color
to color and from a steady glow to a simulated flicker. To make these changes
the manufacturer conveniently provides a tiny remote control that probably
operates on some unlicensed band.
The whole set cost $20 (USD) at the grocery store and was, incredibly,
“Made in the USA.” As Christmas decorations are some of the most
cost-sensitive products imaginable, the designers of this candle set obviously
took great pains to reduce its bill of materials and manufacturing costs. But
they could have eliminated the remote control if they used NFC and a
smartphone app. Consequently, the remote controls accompanying all their
candles, strings of lights and other assorted holiday products could be
Multiply that across the hundreds of thousands or even millions of these
things sold across the country, and we’re talking about real money.
Yes, the app would have cost a bit to develop but it could be modified for use
across the company’s entire product line. I’ll never know, but I
suspect they never even considered NFC.
The use of NFC in inexpensive products like this, of which there are
thousands, recently got even more appealing thanks to a microcontroller within
NXP’s LPC800 series
introduced last October
targeted specifically at products like this. The
integrates NFC functionality in a single chip, and it also brings 32-bit
performance, lots of I/O and other features to the broad market for the cost
of an 8-bit MCU without NFC.
This makes for some interesting possibilities. The LPC8N04 MCU uses an
Arm® Cortex®-M0+ 8-MHz processor, 32 Kbtyes of flash memory for data
and programs, 4 kB of EEPROM and 8 kB of SRAM, 12 GPIO pins plus
I2C and SPI, four sleep modes for the CPU, wake up via reception of
an NFC signal and the ability to use energy harvesting for power. It even has
an integrated real-time clock and temperature sensor with +1.5o
C absolute temperature accuracy. Remember, all this is integrated in a single
device that costs about $1 (USD).
The use of NFC isn’t expensive to begin with and the LPC8N04 MCU makes
it even less so. As it provides interfaces required to external functions,
almost any type sensor, lights, sounds, assorted programmable functions, an
LCD panel, can be enabled to produce differentiating features. Imagine the
possibilities to up level the cool factor on that ol’ model train set
… flashing lights, horn, etc. Some manufacturers are doing this now
with a smartphone app, but they’re using Bluetooth®, which is
It seems, to me at least, that the benefits of NFC haven’t yet
permeated the design community. It’s not for the lack of trying by
device manufacturers and the NFC Forum, neither of which seem to have moved
the needle. There is a wealth of information available from both.
Learn more about the LPC8N04 MCU.
Get to know the
LPC8N04 MCU-based development board