Mikrochip
Hardware

How RFID label memories are structured - and how additional information can be intelligently linked with software.

In this article, you will learn how the memory of a UHF RFID label is structured, what types of memory units there are and what they are used for. We also show how innovative solutions can be used to capture significantly more information about the product than the memory of an RFID chip alone.

 

The four memory areas of an RFID label

The memory of a UHF RFID label (according to EPC Gen2 standard) is divided into different units, so-called memory banks. These areas perform different tasks:

Memory area

Purpose/use

Reserved Memory

Password protection (e.g. blocking, deleting the tag)

EPC Memory

Unique identification number of the product

TID Memory

Manufacturer information and serial numbers

User Memory

Storage space for your own additional data

Each of these areas fulfills specific tasks that may be more or less important depending on the application.

 

Typical memory sizes and their significance

The size of the individual memory areas varies depending on the chip model and the intended use:

Memory area

Typical size

Bemerkung

Reserved Memory

64 bit

Contains access passwords

EPC Memory

96–256 bit

For the product identifier

TID Memory

64–128 bit

Fixed, unchangeable chip information

User Memory

0-512 bytes or more

Free memory for user data

The larger the user memory, the more additional information can be stored directly on the label - such as batch numbers, article numbers, etc.

 

When is small storage sufficient - and when is large storage required?

Small memory sizes (EPC only) are ideal for applications where fast identification is paramount, e.g. in logistics or goods receipt. They offer:

  • Faster read times
  • Better range (because less energy is required)
  • Cheaper RFID labels

Larger memory sizes are used when additional data needs to be stored directly on the tag - for example in complex production or maintenance processes. More memory is required here, however:

  • Read and write times increase
  • More energy is required for reading
  • Costs per label increase

Therefore: Only plan as much storage as necessary!

 

The influence of memory size on the RFID process

The decision for a specific memory size has a direct impact on the entire RFID process:

Parameters

Small memory

Large memory

Reading speed

Very fast

Slightly slower

Reach

Very good

Partially reduced

Costs

Inexpensive

More expensive

Process complexity

Simple

Increased effort for data maintenance

Particularly in high-speed processes (e.g. for incoming goods scanners or conveyor belts), it is advantageous to limit yourself to small EPC data and manage additional information elsewhere.

 

Conclusion: Use storage cleverly - and expand potential

Although the memory of an RFID label is technically limited, it offers many possibilities for efficient processes if it is used correctly. Small memory sizes are often sufficient for simple identification tasks, while larger memories provide valuable services for more complex requirements.

Thanks to the intelligent GRAIDWARE software solution, SIGMA Chemnitz also offers the option of managing a lot more information about an RFID label in a database. This means that knowledge about a product is not only stored on the label itself, but is also digitally linked in an intelligent way and can be mapped in much larger stages. This allows companies to use far more data efficiently without overloading the chip memory - and at the same time make their processes even more flexible and transparent.

Viktor Wagner

Viktor Wagner

Managing Director

Viktor Wagner has 12 years of professional experience as a consultant for digitalization at SIGMA Chemnitz. His expertise covers various areas, including RFID applications and the planning of RFID projects, the assessment of the feasibility of RFID projects, the design of solutions and the sale of software solutions.

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