M95256-WMN6TP Integrated Circuits (ICs)

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Memory

M95256-WMN6TP is a Ferroelectric Random Access Memory (FRAM) device integrated on a serial interface that allows access to memory locations through the SPI protocol.

Application Field

M95256-WMN6TP\'s typical applications include the following:

• Data logging
• Configuration data storage
• Stationery device memory
• Wireless communications
• Motor control
• Automotive
• Industrial applications
• Medical instrumentation

Working Principle

The fundamental reason that makes M95256-WMN6TP FRAM devices so attractive to system designers is the manner in which data is stored. It is a non-volatile memory technology that uses a ferroelectric material to store information. This material is essentially a crystal with the unique attribute that holds its polarity even when power has been removed from the memory.

The ferroelectric material acts as a capacitor. When the applied voltage polarizes the crystal in one direction, the capacitor stores a “1," and when the voltage polarizes the material in the other direction, the capacitor stores a “0.” The FRAM memory array is organized into blocks of memory, each of which is made up of 8 independent memory cells. Each of the 8 cells is built from one bit of data along with 1 bit of parity. Writing to the memory requires the data to be passed to the internal write circuit, which will divide the data into individual bits and store it into memory.

The internal write circuit also contains an error detection circuit that compares the data to the internal parity bits to ensure error-free data. In addition, the write circuit will validate the programming and erase/write operations to make sure the operation is successful.

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