Flash 10 Click Board™

Product Code: MIKROE-5289

How Does The Flash 10 Click Board™ Work? The Flash 10 Click Board™ as its foundation uses the AT25FF321A, a highly reliable serial Flash memory solution designed for use in a wide variety of high-volume consumer and connected applications from Dialog Semiconductor. The AT25FF321A is organized as a 32Mbit (16x2 Mbit physical block) Flash memory ideally suited for systems in which program code is shadowed from Flash memory into embedded or external RAM (code shadow) for execution and where small amounts of data are stored and updated locally in the Flash memory. The AT25FF321A specifies a minimum of 100.000 endurance cycles with data retention of a minimum of 20 years, giving it the capability to handle unlimited reads/writes to the memory. The AT25FF321A's erase block sizes are optimized to meet the needs of today's code and data storage applications, supporting flexible and optimized erase architecture for code and data storage applications (4kB, 32kB, and 64kB block erase operations) and a full-chip erase feature.

The most efficient use of memory space can be achieved by optimizing the erase blocks' size. Also, the AT25FF321A contains four specialized 128-byte One-Time Programmable (OTP) security registers which can be used to store a unique device ID and locked key storage. The Flash 10 Click Board™ communicates with MCU through a standard SPI interface supporting the two most common SPI modes, SPI Mode 0 and 3. Furthermore, this Click board™ provides additional hardware-controlled functions. The configurable Write Protection, marked as WP and routed on the PWM pin of the mikroBUS™ socket, protects all registers (including status and configuration) from write operations and must be held low to inhibit all the write operations to registers. When this pin is low, all memory and register writes are prohibited, and the address counter is not incremented. Also, it is possible to use the Reset or Hold function through the RST pin of the mikroBUS™ socket, depending on the state of the HOLD/RESET bit 7 in Status Register 3. In the case of the Hold function, this pin temporarily pauses serial communication without deselecting or resetting the device, while in the case of the Reset feature, a low logic level on the RST pin puts the AT25FF321A into a Reset state. The Flash 10 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 Type FLASH Applications Can be used for storage and data transfer in consumer devices, enterprise systems, and industrial applications On-board modules AT25FF321A - serial Flash memory solution from Dialog Semiconductor Key Features 32Mbit (16x2Mbit physical block) flash memory, optimized erase architecture for code and data storage applications, flexible non-volatile block protection, high performance, write protection, data endurance and retention, low power consumption, and more Interface QSPI,SPI Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V PINOUT DIAGRAM This table shows how the pinout of the Flash 10 Click Board™ 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 QSPI IO2 / Write Protection QSPI IO3 / Reset RST 2 RST INT 15 NC SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC QSPI IO1 / SPI Data OUT SDO 5 MISO SCL 12 NC QSPI IO0 / SPI Data IN SDI 6 MOSI SDA 11 NC Power Supply 3.3V 7 3.3V 5V 10 NC Ground