Data writing without power supply?! The know-how behind the magic demonstration is as follows
Today, I will use a demo to show you an amazing feature of writing data to FRAM without power supply. We can see that the demo in the figure below is equipped with a knob, and the function of the circuit is to count the number of revolutions of the knob.
A dedicated software is installed on the computer, and the demo is powered through the computer's USB cable. When the knob on the demo is turned, the counter on the computer changes, and the increase is equal to the number of turns of the knob.
Note that the current value is 3173. Please remember this value. Next, remove the USB cable. Since the USB cable is not connected, the data on the demo is no longer transmitted to the computer, so the counter on the computer shows 0. At this time, the demo is also powered off.
Now, continue to turn the knob on the demo for a total of 4 turns. Next, connect the USB cable again to connect the demo to the computer.
Wow, a magical scene happened - look, the counter value increased to 3177, which is obviously the result of 3173 plus 4 before the power outage!
Guess how he did it?
Ding ding ding, the magic mystery is revealed - the demo uses Fujitsu's ferroelectric memory FRAM, which is widely used in the industry!
This “little magic trick” means that even without power supplied via the USB cable, the FRAM can still write data and retain the data (the number of turns of the knob on the demo) because FRAM can write data with very little power, or even without power supply!
FRAM has first-class quality, high reliability, and non-volatility. Does this "little magic" make you feel bright in front of FRAM?
Fujitsu has produced a large number of FRAMs for more than 15 years, which are widely used in industry, medical care, and IC cards.
The "characteristics of writing data to FRAM without power supply" shown to you today can be used in the following applications:
This FRAM can be used in athletes’ wearable devices to record vital data and exercise history, using only the power generated by vibration;
FRAM is used in containers used to transport perishable foods to log the transport environment, and sensor tags are powered by energy harvesting techniques, such as electricity generated by vibration.
Battery-free power will be key for wearable devices, IoT, and more and more applications. In the future, we will continue to develop FRAM-based battery-free solutions that can be achieved with traditional memory.
Fujitsu continues to strive to help customers achieve innovation.
Do you understand the above pictures and text? Watch the video to learn more~