In the development of an MPU, ASIC, ASSP or any type of LSI chip, you might have a need for nonvolatile memory (NVM) in your design specification. For instance, you may want to store a security code before or after shipping your products or you may wish to make a last-minute change on your software just before releasing to the market. If you are DRAM or SRAM designer, you want to program redundancy allocation without requiring a laser-blow fuse.

A couple of nonvolatile memory technologies are already available for embedded system LSI’s like “Embedded EEPROM” and “Embedded Flash”. However, these process technologies are much more expensive but less advanced than standard CMOS processes. Similarly, an external Flash memory could be used but it adds extra cost and can be easily read making security codes or any other contents easily reverse engineered.

NSCore’s PermSRAM™ (one-time non-volatile memory solution), TwinBit™ (muliti-time non-volatile memory solution) is now the key to differentiate your products from any others. It is an Embedded Non-Volatile Memory using standard CMOS processes without any extra masks, while its memory cell size is similar to that for an embedded FLASH memory.

NSCore License Logic NV
memory IP

Your CMOS Products;
ASIC, ASSP, MCU, Analog IC, LCD driver, etc.

Nonvolatile memory function without additional mask or process step.


NSCore provides you;

Logic NVM Library

  • Patent Licensing
  • Design Service
  • Test Servise
  • Consulting


Replacing e-Fuse

PermSRAM™/TwinBit™ needs less than 1/100 of the silicon area that e-Fuse requires while being fully field programmable.

No Charge Pump Necessary

PermSRAM™/TwinBit™ does not always need a charge-pump because of the lower programming voltage requirement of 5V typically available on the system board. It can save the silicon area by 20%-30%.

Highly Secured Storage

Data stored in e-Fuse or external ROM/FLASH is not secure since the data can be easily read by accessing the data bus or through visual inspection of the chip. For this reason, these technologies are not ideal solutions for applications needing high levels of security such as security keys or sensitive program code.
With PermSRAM™/TwinBit™, data communication can be performed only on a silicon and the contents of the stored data is very difficult to observe from the outside. PermSRAM™/TwinBit™ strongly protects the customer’s sensitive data.

We resolve customer’s issues as a system solution

PermSRAM™/TwinBit™ can be used in various types of applications. Our skilled engineering staff will help to satisfy customer’s needs from the system point of view.

For more information on OTP and MTP products please use the following form to request information or send email to

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