EEPROM 5 Click is based on the M95M04, the electrically erasable programmable memory organized as 524288 x 8 bits accessed through the SPI interface from STMicroelectronics. The M95M04 benefit from a wide power supply range of 1.8V to 5.5V, as well as 40 years of data retention, and combines their unprecedented data storage with excellent energy efficiency. It is characterized by high reliability, lasting one billion full-memory read-write cycles capable of writing 512 Bytes in 5ms. With 4Mbit capacity, it allows the capture and storage of more data through the serial SPI bus that enables equipment such as smart meters to intensify data logging for managing grids more effectively and providing more user-friendly billing. This Click board™ also provides high-density non-volatile storage for persistent data such as application code, calibration tables, and user parameters, as well as for intensive data logging.

EEPROM 5 Click communicates with MCU using the SPI serial interface that supports the two most common modes, SPI Mode 0 and 3, with a maximum SPI frequency of 10 MHz. In addition to the SPI communication, the EEPROM 5 Click also has two additional pins used for Write Protection and HOLD function routed to the PWM and RST pins of the mikroBUS™ socket.

The HOLD pin, labeled as HLD routed to the RST pin of the mikroBUS™ socket, can be used to pause the serial communication with the M95M04 without having to deselect the device. In Normal operation, the M95M04 is kept selected for the whole duration of the Hold condition. Deselecting the device while it is in the HOLD condition has the effect of resetting the device state. On the other side, the configurable Write Protection function, labeled as WP routed to the PWM pin of the mikroBUS™ socket, allows the user to freeze the size of the area of memory that is protected against Write instructions (as specified by the values in the BP1 and BP0 bits of the STATUS register).

This Click board™ is designed to operate with both 3.3V and 5V logic voltage levels selected via the PWR SEL jumper. It allows for both 3.3V and 5V capable MCUs to use the SPI communication lines properly. However, the Click board™ comes equipped with a library that contains easy to use functions and an example code which can be used, as a reference, for further development