Flash Click

How does it work?

Flash Click is based on the EN25Q80B, a serial flash memory from EON Electric. The EN25Q80B features Serial Flash Discoverable Parameters (SFDP) mode, used to retrieve advanced information from the device, such as the operating characteristics, structure and vendor-specified information, memory size, operating voltage, timing information, and more. Page Program instruction allows up to 256 bytes to be written during one write cycle, although it is possible to write less than that. By automatically incrementing the addresses, it is possible to read the entire memory by a single command. The EN25Q80B allows the erasure of one sector at a time, half a block at a time, block at a time, and the entire memory. The addition of 512 bytes of one-time programmable (OTP) memory can be useful for building secure storage devices and similar secure storage applications.

Flash Click uses a standard 4-wire SPI serial interface to communicate with the host MCU, supporting Dual SPI and Quad SPI modes, which utilize these two additional modes, allowing faster data transfer speeds several times. There are additional WP for the write protect function and HLD pins. If using Quad SPI, the SDI and SDO become DQ0 and DQ1, while WP and HLD become DQ2 and DQ3, respectively. Due to a small number of MCUs that support Dual and Quad SPI, MIRKOE offers library functions that work only with standard SPI communication, ensuring absolute compatibility with all the supported MCUs.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing 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 Flash 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 Protection/QSPI D2
Data Transfer Pause / QSPI D3	HLD	2	RST	INT	15	NC
SPI Chip Select	CS	3	CS	RX	14	NC
SPI Clock	SCK	4	SCK	TX	13	NC
SPI Data Out/QSPI D1	SDO	5	MISO	SCL	12	NC
SPI Data In/QSPI D0	SDI	6	MOSI	SDA	11	NC
Power supply	+3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Flash Click electrical specifications

Software Support

We provide a library for the Flash Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE 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 Flash Click driver.

Key functions

• Page Write function.

• Page Read function.

• Sector Erase function.

Example Description

This example demonstrates the use (control) of the FLASH memory.

 void application_task( void ) 
 { 
     enter_data( "Mikroelektronika (MikroE)" ); 

     log_printf( &logger, "> Data content to be written: %srn", data_buf ); 
     log_printf( &logger, "> Data writing to memory...rn" ); 
     flash_write_page( &flash, FLASH_MEM_ADDR_FIRST_PAGE_START, data_buf, n_data ); 
     log_printf( &logger, "> Done.rn" ); 

     memset( data_buf, 0, sizeof( data_buf ) ); 
     process_wait( ); 

     log_printf( &logger, "> Data reading from memory...rn" ); 
     flash_read_page( &flash, FLASH_MEM_ADDR_FIRST_PAGE_START, data_buf, n_data ); 
     log_printf( &logger, "> Done.rn> Read data content: %srn", data_buf ); 

     process_wait( ); 

     log_printf( &logger, "> Sector erasing...rn" ); 
     flash_erase_sector( &flash, FLASH_MEM_ADDR_FIRST_SECTOR_START ); 
     log_printf( &logger, "> Done.rn" ); 

     process_wait( ); 
 }

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.Flash

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 MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE 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.