EEPROM 12 Click

How does it work?

EEPROM 12 Click is based on the M24256E, an EEPROM from STMicroelectronics. The protections include write protection of the whole memory array, enhanced ESD/latch-up protection, and more. It can withstand over 4 million write cycles and has over 200 years of data retention. It has a write time both for byte or page within 5ms and supports random and sequential read modes. The write page mode allows up to 64 bytes to be written in a single write cycle. The error correction code (ECC) is implemented on each group of four EEPROM bytes, which improves the read reliability. During the internal write cycle, the device disconnects itself from the bus and writes a copy of the data from its internal latches to the memory cells. This, in turn, minimizes write delays.

EEPROM 12 Click uses a standard 2-Wire interface to communicate with the host MCU, supporting a clock frequency of up to 1MHz. The EEPROM supports a configurable device address register (CDA), which allows the user to define the device address and a device address lock (DAL) to freeze the configurable device address register. The EEPROM also supports a write control protection, which can be accessed over the WC pin.

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.

Specifications

Pinout diagram

This table shows how the pinout on EEPROM 12 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	WC	Write Control
	NC	2	RST	INT	15	NC
ID COMM	CS	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
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 12 Click electrical specifications

Software Support

We provide a library for the EEPROM 12 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for EEPROM 12 Click driver.

Key functions

• eeprom12_memory_write EEPROM 12 memory write function.

• eeprom12_memory_read EEPROM 12 memory read function.

Example Description

This example demonstrates the use of EEPROM 12 Click board™. The demo app writes specified data to the memory and reads it back.

void application_task ( void )  
 { 
     uint8_t data_buf[ 128 ] = { 0 }; 
     memcpy( data_buf, DEMO_TEXT_MESSAGE_1, strlen( DEMO_TEXT_MESSAGE_1 ) ); 
     if ( EEPROM12_OK == eeprom12_memory_write( &eeprom12, STARTING_ADDRESS_1,  
                                                           data_buf,  
                                                           strlen( DEMO_TEXT_MESSAGE_1 ) ) ) 
     { 
         log_printf( &logger, " Write data: %srn", data_buf ); 
         Delay_ms( 100 ); 
     } 

     memset( data_buf, 0, sizeof( data_buf ) ); 
     Delay_ms( 100 ); 
     if ( EEPROM12_OK == eeprom12_memory_read( &eeprom12, STARTING_ADDRESS_1,  
                                                          data_buf,  
                                                          strlen( DEMO_TEXT_MESSAGE_1 ) ) ) 
     { 
         Delay_ms( 100 ); 
         log_printf( &logger, " Read data: %srnn", data_buf ); 
         Delay_ms( 3000 ); 
     } 

     memcpy( data_buf, DEMO_TEXT_MESSAGE_2, strlen( DEMO_TEXT_MESSAGE_2 ) ); 
     if ( EEPROM12_OK == eeprom12_memory_write( &eeprom12, STARTING_ADDRESS_2,  
                                                           data_buf,  
                                                           strlen( DEMO_TEXT_MESSAGE_2 ) ) ) 
     { 
         log_printf( &logger, " Write data: %srn", data_buf ); 
         Delay_ms( 100 ); 
     } 

     memset( data_buf, 0, sizeof( data_buf ) ); 
     Delay_ms( 100 ); 
     if ( EEPROM12_OK == eeprom12_memory_read( &eeprom12, STARTING_ADDRESS_2,  
                                                          data_buf,  
                                                          strlen( DEMO_TEXT_MESSAGE_2 ) ) ) 
     { 
         Delay_ms( 100 ); 
         log_printf( &logger, " Read data: %srnn", data_buf ); 
         Delay_ms( 3000 ); 
     } 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.EEPROM12

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.