User Manual

4. Data storage

The mikromedia 3 development board is equipped with two

types of storage memory: with a microSD card slot and a

Flash memory module.

4.1 microSD card slot 4.2 External ﬂash storage

The microSD card slot (1) allows storing large amounts of data externally,

on a microSD memory card. It uses the Secure digital input/output

interface (SDIO) for communication with the MCU. The microSD card

detection circuit is also provided on the board. The microSD card is the

smallest SD Card version, measuring only 5 x 11 mm. Despite its small

size, it allows tremendous amounts of data to be stored on it. In order to

read and write to the SD Card, a proper software/ﬁrmware running on the

host MCU is required.

mikromedia 3 is equipped with the SST26VF064B Flash memory (2). The

Flash memory module has a density of 64 Mbits. Its storage cells are

arranged in 8-bit words, resulting in 8Mb of non-volatile memory in total,

available for various applications. The most distinctive features of the

SST26VF064B Flash module are its high speed, very high endurance, and

very good data retention period. It can withstand up to 100,000 cycles, and

it can preserve the stored information for more than 100 years. It also uses

the SPI interface for the communication with the MCU.

Figure 10: MicroSD card slot view

mikromedia 3 for STM32 CAPACITIVE U S E R M A N U A L

P A G E 18

DATA STORAGE