Mikroelektronika d.o.o.
Carte à clic DRAM
Carte à clic DRAM
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Key Features:
- Faible consommation d'énergie, SPI/QPI avec mode SDR, hautes performances, organisé en 8 M x 8 bits, taille de page de 1 024 octets, mécanisme de rafraîchissement autogéré, réinitialisation logicielle, etc.
- Basé sur la mémoire APS6404L-3SQR - 64 Mo PSRAM (Pseudo-SRAM) d'AP Memory
- Peut être utilisé pour des applications portables à faible consommation et à faible coût
- mikroBUS : interfaces SPi et QSPI
Présentation de la DRAM Click Board™
Mettez à niveau la mémoire de votre appareil avec la DRAM Click Board™, une carte complémentaire compacte représentant une solution de mémoire vive dynamique. Cette carte est équipée de la mémoire PSRAM SPI/QPI hautes performances APS6404L-3SQR de 64 Mo organisée en 8 Mo x 8 bits chacun, d'AP Memory.
Hautes performances et faible consommation d'énergie
Le dispositif Pseudo-SRAM de la DRAM Click Board™ est doté d'une interface à grande vitesse et à faible nombre de broches et intègre un mécanisme de rafraîchissement autogéré transparent pour maximiser les performances de l'opération de lecture de la mémoire. Avec 4 broches d'E/S SDR et la possibilité de fonctionner en mode SPI ou QPI (quad device interface) avec des fréquences allant jusqu'à 133 MHz, cette carte Click™ est particulièrement adaptée aux applications portables à faible consommation et à faible coût.
Intégration simple et développement de logiciels
La carte DRAM Click Board™ est supportée par une bibliothèque compatible mikroSDK, qui comprend des fonctions qui simplifient le développement logiciel. Cette carte Click Board™ est un produit entièrement testé, prêt à être utilisé sur un système équipé du socket mikroBUS™.
Améliorez les capacités de mémoire de votre appareil dès aujourd'hui avec la DRAM Click Board™.
How Does The DRAM Click Board™ Work?
The DRAM Click Board™ is based on the APS6404L-3SQR, a 64Mb PSRAM (Pseudo-Static RAM) memory with an SPI/QPI interface from AP Memory. Organized as 8M x 8 bits each, this memory also has a page size of 1024 bytes alongside high speed and high performance. It also incorporates a seamless self-managed refresh mechanism specially designed to maximize the performance of memory read operation (it does not require the support of DRAM refresh from the system host). It is most suitable for low-power and low-cost portable applications.
The APS6404L-3SQR communicates with MCU using the SPI serial interface that also supports Quad SPI and the two most common modes, SPI Mode 0 (QSPI Mode 1), with a maximum SPI frequency of 133MHz. The APS6404L-3SQR includes an on-chip voltage sensor used to start the self-initialization process. When the main power supply voltage reaches a stable level at or above the minimum supply voltage level, the device will require 150μs and user-issued RESET Operation to complete its self-initialization process. The device powers up in SPI Mode by default configuration but can also be switched into QPI mode. Besides, it is required to have a CS pin on a high logic level before beginning any operations.
The DRAM 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 | DRAM |
| Applications | Can be used for low-power and low-cost portable applications |
| On-board modules | APS6404L-3SQR - 64Mb PSRAM (Pseudo-SRAM) memory from AP Memory |
| Key Features | Low power consumption, SPI/QPI with SDR mode, high performance, organized as 8M x 8bits, page size of 1024 bytes, self-managed refresh mechanism, software reset, 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 DRAM 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 | IO2 | QSPI IO2 | |
| QSPI IO3 | IO3 | 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 IO1 | SDO | 5 | MISO | SCL | 12 | NC | |
| SPI Data IN / QSPI IO0 | 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
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
DRAM CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| Memory Size | - | - | 64 | Mb |
| Operating Temperature Range | -25 | +25 | +85 | °C |
Software Support
We provide a library for the DRAM Click Board™ and a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on the MikroE Github account.
Library Description
This library contains API for the DRAM Click Board™ driver.
Key functions
-
dram_memory_writeThis function writes the desired number of data bytes starting from the selected memory address. -
dram_memory_readThis function reads the desired number of data bytes starting from the selected memory address. -
dram_memory_read_fastThis function reads the desired number of data bytes starting from the selected memory address performing a fast read feature.
Example Description
This example demonstrates DRAM Click Board™ by writing specified data to the memory and reading it back.
void application_task ( void )
{
uint8_t data_buf[ 128 ] = { 0 };
log_printf ( &logger, " Memory address: 0x%.6LXrn", ( uint32_t ) STARTING_ADDRESS );
memcpy ( data_buf, DEMO_TEXT_MESSAGE_1, strlen ( DEMO_TEXT_MESSAGE_1 ) );
if ( DRAM_OK == dram_memory_write ( &dram, STARTING_ADDRESS, data_buf, sizeof ( data_buf ) ) )
{
log_printf ( &logger, " Write data: %srn", data_buf );
Delay_ms ( 100 );
}
memset ( data_buf, 0, sizeof ( data_buf ) );
if ( DRAM_OK == dram_memory_read ( &dram, STARTING_ADDRESS,
data_buf, sizeof ( data_buf ) ) )
{
log_printf ( &logger, " Read data: %srnn", data_buf );
Delay_ms ( 3000 );
}
log_printf ( &logger, " Memory address: 0x%.6LXrn", ( uint32_t ) STARTING_ADDRESS );
memcpy ( data_buf, DEMO_TEXT_MESSAGE_2, strlen ( DEMO_TEXT_MESSAGE_2 ) );
if ( DRAM_OK == dram_memory_write ( &dram, STARTING_ADDRESS, data_buf, sizeof ( data_buf ) ) )
{
log_printf ( &logger, " Write data: %srn", data_buf );
Delay_ms ( 100 );
}
memset ( data_buf, 0, sizeof ( data_buf ) );
if ( DRAM_OK == dram_memory_read_fast ( &dram, STARTING_ADDRESS, data_buf, sizeof ( data_buf ) ) )
{
log_printf ( &logger, " Fast read data : %srnn", data_buf );
Delay_ms ( 3000 );
}
}
The complete application code and ready-to-use projects can be installed directly from NECTO Studio. The package Manager (recommended), is downloaded from our LibStock™ or found on the MikroE Github account.
Other MikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.DRAM
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, 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
The DRAM 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.
Carte à clic DRAM
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