EEPROM 16 Click

How does it work?

EEPROM 16 Click is based on the NV25320LV, a 32Kb Serial EEPROM from onsemi organized internally as 4K x 8 bits designed to provide reliable non-volatile memory storage for automotive and industrial applications. Engineered with Byte Level On-Chip Error Correction Code (ECC), the NV25320LV ensures high reliability, making it ideal for demanding environments where data accuracy is paramount. An additional Identification Page offers extra storage space that can be permanently write-protected, providing a secure area for storing system-specific data such as serial numbers or configuration parameters. Built on low-power CMOS technology, the device operates efficiently while maintaining long-term data stability, with an impressive data retention period of up to 200 years. Its self-timed write cycle further simplifies memory management, allowing autonomous completion of write operations without external supervision.

The NV25320LV stands out with its 32-byte page write buffer, allowing efficient data writing operations, and supports both software and hardware write protection mechanisms. These include options for securing either specific memory regions or the entire memory array, enhancing data integrity and safeguarding critical information. EEPROM 16 Click is an excellent solution for a range of automotive control units and modules, including door modules, body computers, energy management units, immobilizer systems, wiper modules, park assist systems, light management units, electronic parking brakes, engine start/stop control units, engine control units, ABS/ESP systems, airbags, electric steering control units (ESL), and integrated navigation and infotainment systems. Its combination of robust protection features, high reliability, and flexible interfacing makes it a dependable choice for applications requiring secure and persistent data storage under rigorous operating conditions.

This Click board™ is designed in a unique format supporting the newly introduced MIKROE feature called “Click Snap.” Unlike the standardized version of Click boards, this feature allows the main IC area to become movable by breaking the PCB, opening up many new possibilities for implementation. Thanks to the Snap feature, the NV25320LV can operate autonomously by accessing its signals directly on the pins marked 1-8. Additionally, the Snap part includes a specified and fixed screw hole position, enabling users to secure the Snap board in their desired location.

EEPROM 16 Click communicates with MCU through a standard SPI interface supporting the two most common SPI modes, SPI Mode 0 and 3, and a maximum clock frequency of up to 20MHz. Furthermore, the board features a HOLD function, marked as HLD and routed on the default position of the INT pin of the mikroBUS™ socket. The hold function allows the suspension of serial communications without disrupting ongoing operations. The board also has a Write Protect feature, marked as WP and routed on the default position of the PWM of the mikroBUS™ socket, that safeguards all registers and memory from unintended write operations through both hardware and software mechanisms.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

Click Snap

Click Snap is an innovative feature of our standardized Click add-on boards, designed to bring greater flexibility and optimize your prototypes. By simply snapping the PCB along predefined lines, you can easily detach the main sensor/IC/module area, reducing the overall size, weight, and power consumption – ideal for the final phase of prototyping. For more details about Click Snap, visit the official page dedicated to this feature.

Specifications

Pinout diagram

This table shows how the pinout on EEPROM 16 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	WP	Write Protect
ID SEL	RST	2	RST	INT	15	HLD	Communication Pause
SPI Select / ID COMM	CS	3	CS	RX	14	NC
SPI Clock	SCK	4	SCK	TX	13	NC
SPI Data OUT	SDO	5	MISO	SCL	12	NC
SPI Data IN	SDI	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

EEPROM 16 Click electrical specifications

Software Support

EEPROM 16 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK‘s open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

Example Description

This example demonstrates the use of EEPROM 16 Click board by writing specified data to the memory and reading it back.

Key Functions

• eeprom16_cfg_setup This function initializes Click configuration structure to initial values.
• eeprom16_init This function initializes all necessary pins and peripherals used for this Click board.
• eeprom16_default_cfg This function executes a default configuration of EEPROM 16 Click board.
• eeprom16_memory_write This function writes a desired number of data bytes starting from the selected memory address.
• eeprom16_memory_read This function reads a desired number of data bytes starting from the selected memory address.

Application Init

Initializes the driver and performs the Click default configuration.

Application Task

Writes a desired number of bytes to the memory and then verifies if it is written correctly by reading from the same memory location and displaying the memory content on the USB UART.

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output – Use the “Application Output” window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal – Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.