Provide reliable, high-speed data storage for many applications with ANV32A62A and STM32F207ZG
Lightning-fast memory for ultimate performance
Published Sep 17, 2024
Click board™
SRAM 2 Click
Dev. board
Nucleo 144 with STM32F207ZG MCU
Compiler
NECTO Studio
MCU
STM32F207ZG
Our SRAM memory excels at delivering real-time responsiveness in a variety of devices and systems
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Hardware Overview
How does it work?
SRAM 2 Click is based on the ANV32A62A, an SRAM memory from Anvo-Systems Dresden. It uses nvSRAM which is ordinary SRAMs with the ability for self-sufficient, automatic backup of SRAM-data in an internal FLASH, All Read/Write operations are addressing the SRAM array only. From a user point of view, nvSRAM appears as ordinary SRAM. SRAM are fast, energy efficient and does not wear-out while R/W operations. This explains the superior speed and the unlimited R/W endurance of nvSRAM. Data transfers automatically to the non-volatile storage cells when power loss is detected or in any brown out situation (PowerStore). As long as power will be supplied within operating conditions all data stay volatile in the SRAM cells. SRAM 2 Click is using a standard two-wire interface (I²C) and is functional similar to serial EEPROMs or FRAM. The
addressing requires a 13 bit address out of the 2-byte address of the two-wire protocol. The jumpers ADDR SEL are device address inputs to select 1 of up to 4 devices of the same type on the same I²C bus. To select one device the hard wired addresses on the 2 pins have to match with the related bits in the slave address. This SRAM also features PowerStore operation which is a unique feature of the SONOS technology that is enabled by default on the ANV32A62A. During normal operation, the device will draw current from VCC for circuit operation and to charge a capacitor connected to the VCAP pin. This stored charge will be used by the chip to perform a single STORE operation in case of power down. If the voltage on the VCC pin drops below VSWITCH, the part will automatically disconnect the VCAP pin from VCC. A STORE operation will be initiated with power
provided by the VCAP capacitor. If a write operation is in progress all data of complete written pages are valid. Only the last incomplete written byte will be ignored. With the following Power Store execution these data become non-volatile. To reduce needless non-volatile stores, Power Store operation will be ignored unless at least one write operation has taken place since the most recent STORE cycle. The PowerStore Operation is valid for the complete memory array. 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. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
Nucleo-144 with STM32F207ZG MCU board provides an affordable and flexible way for users to try out new concepts and build prototypes by choosing from the various combinations of performance and power consumption features, provided by the STM32 microcontroller. For the compatible boards, the internal or external SMPS
significantly reduces power consumption in Run mode. The ST Zio connector, which extends the ARDUINO® Uno V3 connectivity, and the ST morpho headers provide an easy means of expanding the functionality of the Nucleo open development platform with a wide choice of specialized shields. The STM32 Nucleo-144 board
does not require any separate probe as it integrates the ST-LINK debugger/programmer. The STM32 Nucleo-144 board comes with the STM32 comprehensive free software libraries and examples available with the STM32Cube MCU Package.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M3
MCU Memory (KB)
1024
Silicon Vendor
STMicroelectronics
Pin count
144
RAM (Bytes)
131072
You complete me!
Accessories
Click Shield for Nucleo-144 comes equipped with four mikroBUS™ sockets, with one in the form of a Shuttle connector, allowing all the Click board™ devices to be interfaced with the STM32 Nucleo-144 board with no effort. This way, MIKROE allows its users to add any functionality from our ever-growing range of Click boards™, such as WiFi, GSM, GPS, Bluetooth, ZigBee, environmental sensors, LEDs, speech recognition, motor control, movement sensors, and many more. Featuring an ARM Cortex-M microcontroller, 144 pins, and Arduino™ compatibility, the STM32 Nucleo-144 board offers limitless possibilities for prototyping and creating diverse applications. These boards are controlled and powered conveniently through a USB connection to program and efficiently debug the Nucleo-144 board out of the box, with an additional USB cable connected to the USB mini port on the board. Simplify your project development with the integrated ST-Link debugger and unleash creativity using the extensive I/O options and expansion capabilities. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the STM32 Nucleo-144 board with our Click Shield for Nucleo-144, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo 144 with STM32F207ZG MCU as your development board.
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 2 Click driver.
Key functions:
sram2_generic_write- Generic write function.sram2_generic_read- Generic read function.sram2_write_protect- Set PWM pin for write protection.
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 Sram2 Click example
*
* # Description
* This demo application writes and reads from memory.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes driver init.
*
* ## Application Task
* Writes and then reads data from memory.
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "sram2.h"
// ------------------------------------------------------------------ VARIABLES
static sram2_t sram2;
static log_t logger;
static char rx_data;
static uint8_t message_data[ 9 ] = { 'M', 'i', 'k', 'r', 'o', 'E', 13, 10, 0 };
static uint16_t memory_addr = 0x1234;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
sram2_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 );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
sram2_cfg_setup( &cfg );
SRAM2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
sram2_init( &sram2, &cfg );
Delay_ms ( 100 );
}
void application_task ( void )
{
uint8_t cnt;
log_printf( &logger, ">> Write data [ MikroE ] to memory. \r\n" );
sram2_write_protect( &sram2, SRAM2_WR_ENABLE );
Delay_ms ( 10 );
for ( cnt = 0; cnt < 8; cnt++ )
{
sram2_generic_write( &sram2, memory_addr + cnt, message_data[ cnt ] );
Delay_ms ( 10 );
}
Delay_ms ( 1000 );
sram2_write_protect( &sram2, SRAM2_WR_DISABLE );
Delay_ms ( 10 );
log_printf( &logger, ">> Read data from memory. Data : " );
for ( cnt = 0; cnt < 8; cnt++ )
{
sram2_generic_read( &sram2, memory_addr + cnt, &rx_data );
Delay_ms ( 10 );
log_printf( &logger, " %c ", rx_data );
Delay_ms ( 100 );
}
log_printf( &logger, " \r\n" );
log_printf( &logger, "-------------------------------- \r\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
}
int main ( void )
{
/* Do not remove this line or clock might not be set correctly. */
#ifdef PREINIT_SUPPORTED
preinit();
#endif
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
