MIKROE MRAM 2 Click is a compact add-on board for applications that must store and retrieve data and programs quickly using a small number of pins. This board features the MR10Q010, 1Mb Quad Output High-Speed Serial SPI MRAM memory solution from Everspin Technologies. It operates in both standard, single SPI and High-speed QUAD SPI mode with a clock rate up to 104MHz, it features high bandwidth (read and write at 52MB/sec), automatic data protection in case of power loss, and tamper detection function that will detect possible data modification from outside magnetic fields. This Click board™ can be used both as a non-volatile storage media, or temporary RAM expansion for storing data in any embedded application.

MRAM 2 Click is based on the MR10Q010, 1Mb Quad Output High-Speed Serial SPI MRAM memory solution from Everspin Technologies. The MR10Q010 is the ideal memory solution for applications that must store and retrieve data and programs quickly using a small number of pins, low power, and the space-saving 16-pin SOIC package. The four I/O’s in Quad SPI mode allow very fast reads and writes, making it an attractive alternative to conventional parallel data bus interfaces in next-generation RAID controllers, server system logs, storage device buffers, and embedded system data and program memory.

This Click board™ includes an LDO regulator BH18PB1WHFVCT from Rohm Semiconductor to provide the 1.8 V supply voltage. The LDO cut power consumption by lowering its current consumption to approximately 2 μA when the application is operating in the standby state. During normal-current operation, it will automatically switch to high-speed operating mode. The output from the LDO regulator is providing a needed reference voltage for one side of the TXB0106, a 6bit bidirectional level shifting and voltage translator with automatic direction sensing, from Texas Instruments. The reference voltage for the other side of the level shifter is taken from the 3.3V pin from the mikroBUS™.

The MRAM 2 Click communicates with MCU using the standard SPI serial interface that supports SPI Mode 0 and 3 and operates at clock rates up to 104 MHz. It also supports modes like Quad Peripheral Interface (QPI) and Quad SPI organized as 131.072 words of 8 bits. Both read and write operations can occur randomly in memory with no delay between writes. The MR10Q010 uses Write Protect signal routed to the RST pin on the mikroBUS™ to prevent write operations to the Status Register, while HOLD signal routed to the INT pin on the mikroBUS™ is used to interrupts a memory operation for another task. When HOLD is low, the current operation is suspended.

This Click Board™ is designed to be operated only with a 3.3V logic level. A proper logic voltage level conversion should be performed before the Click board™ is used with MCUs with different logic levels. More information about the MR10Q010 can be found in the attached datasheet. However, the Click board™ comes equipped with a library that contains easy to use functions and a usage example that can be used as a reference for the development.

• Interface: QSPI, SPI
• Compatibility: mikroBUS™
• Dimensions: 28.6 x 25.4mm
• Input Voltage: 3.3V
• Maximum Output Current: 20mA
• SPI Clock Frequency: 104MHz

• Schematic
• BH18PB1WHFVCT Datasheet
• MR10Q010 Datasheet
• TXB0106 Datasheet
• mikroSDK
• GitHub