Whether it's in networking, embedded systems, or consumer electronics, SRAM memory solutions drive performance to new heights
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Hardware Overview
How does it work?
SRAM Click is based on the 23LC1024, a highly reliable 1Mbit Serial SRAM designed to interface directly with Microchip's Serial Peripheral Interface (SPI). The 23LC1024 is organized as 128k words of 8 bits each and provides fast access alongside infinite read and write cycles to the memory array. The embedded nonvolatile elements incorporate the CMOS technology, making this Click board™ an ideal choice for secure data storage, creating the world's most reliable nonvolatile memory. The serial SRAM has three modes of operation, byte, page, and sequential, which are chosen by setting bits in the MODE register. In Byte mode, the R/W operations are limited to only one byte,
while in Page mode, R/W operations are limited to within the addressed page. The last Sequential mode allows the entire array to be written to and read from. The 23LC1024 communicates with MCU through a standard SPI interface that enables very high clock speeds up to 20MHz with zero cycle delay read and write cycles. It may also interface with MCUs that do not have a built-in SPI port by using discrete I/O lines programmed properly in firmware to match the SPI protocol. In addition, the 23LC1024 can operate in SDI and SQI modes. In the SDI mode, the SI and SO data lines are bidirectional, allowing the transfer of two bits per clock pulse, while in the SQI mode, two additional
data lines enable the transfer of four bits per clock pulse. The SRAM Click also has an additional HOLD signal, routed to the RST pin of the mikroBUS™ socket labeled as HLD, used to suspend the serial communication without resetting the serial sequence. This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the PWR 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.
Features overview
Development board
Nucleo 32 with STM32F031K6 MCU board provides an affordable and flexible platform for experimenting with STM32 microcontrollers in 32-pin packages. Featuring Arduino™ Nano connectivity, it allows easy expansion with specialized shields, while being mbed-enabled for seamless integration with online resources. The
board includes an on-board ST-LINK/V2-1 debugger/programmer, supporting USB reenumeration with three interfaces: Virtual Com port, mass storage, and debug port. It offers a flexible power supply through either USB VBUS or an external source. Additionally, it includes three LEDs (LD1 for USB communication, LD2 for power,
and LD3 as a user LED) and a reset push button. The STM32 Nucleo-32 board is supported by various Integrated Development Environments (IDEs) such as IAR™, Keil®, and GCC-based IDEs like AC6 SW4STM32, making it a versatile tool for developers.
Microcontroller Overview
MCU Card / MCU

Architecture
ARM Cortex-M0
MCU Memory (KB)
32
Silicon Vendor
STMicroelectronics
Pin count
32
RAM (Bytes)
4096
You complete me!
Accessories
Click Shield for Nucleo-32 is the perfect way to expand your development board's functionalities with STM32 Nucleo-32 pinout. The Click Shield for Nucleo-32 provides two mikroBUS™ sockets to add any functionality from our ever-growing range of Click boards™. We are fully stocked with everything, from sensors and WiFi transceivers to motor control and audio amplifiers. The Click Shield for Nucleo-32 is compatible with the STM32 Nucleo-32 board, providing an affordable and flexible way for users to try out new ideas and quickly create prototypes with any STM32 microcontrollers, choosing from the various combinations of performance, power consumption, and features. The STM32 Nucleo-32 boards do not require any separate probe as they integrate the ST-LINK/V2-1 debugger/programmer and come with the STM32 comprehensive software HAL library and various packaged software examples. This development platform provides users with an effortless and common way to combine the STM32 Nucleo-32 footprint compatible board with their favorite Click boards™ in their upcoming projects.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic

Step by step
Project assembly
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.

2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.

3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.

Software Support
Library Description
This library contains API for SRAM Click driver.
Key functions:
sram_write_byte
- Function write the 8-bit data to the target 24-bit register address of 23LC1024sram_read_byte
- Function read the 8-bit data to the target 24-bit register address of 23LC1024
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* \file
* \brief Sram Click example
*
* # Description
* SRAM Click presents additional 1Mbit SRAM memory that can be added to device.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Application Init performs Logger and Click initialization.
*
* ## Application Task
* SRAM Click communicates with register via SPI protocol by write data to and read data from 23LC1024 Serial RAM device.
* Results are being sent to the UART where you can track their changes.
* All data logs on USB UART for aproximetly every 1 sec.
*
* \author Mihajlo Djordjevic
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "sram.h"
char send_buffer[ 17 ] = { 'm', 'i', 'k', 'r', 'o', 'E', 'l', 'e', 'k', 't', 'r', 'o', 'n', 'i', 'k', 'a', ' ' };
char mem_data[ 17 ];
uint8_t n_cnt;
// ------------------------------------------------------------------ VARIABLES
static sram_t sram;
static log_t logger;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
sram_cfg_t cfg;
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
Delay_ms ( 100 );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
sram_cfg_setup( &cfg );
SRAM_MAP_MIKROBUS( cfg, MIKROBUS_1 );
sram_init( &sram, &cfg );
log_printf( &logger, "--------------------------\r\n" );
log_printf( &logger, " ------ SRAM Click ----- \r\n" );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms ( 1000 );
}
void application_task ( void )
{
log_printf( &logger, " Writing text :\r\n" );
for ( n_cnt = 0; n_cnt < 16; n_cnt++ )
{
sram_write_byte( &sram, n_cnt, send_buffer[ n_cnt ] );
Delay_ms ( 100 );
log_printf( &logger, "%c", send_buffer[ n_cnt ] );
mem_data[ n_cnt ] = sram_read_byte( &sram, n_cnt );
}
log_printf( &logger, "\r\n" );
log_printf( &logger, " Read text :\r\n" );
for ( n_cnt = 0; n_cnt < 16; n_cnt++ )
{
mem_data[ n_cnt ] = sram_read_byte( &sram, n_cnt );
Delay_ms ( 100 );
log_printf( &logger, "%c", mem_data[ n_cnt ] );
}
log_printf( &logger, "\r\n" );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms ( 1000 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END