Mikroelektronika d.o.o.
Tableau de clic Accel 20
Tableau de clic Accel 20
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Le Tableau à clic Accel 20™ est une carte complémentaire compacte qui contient un capteur d'accélération. Cette carte comprend le KX134-1211, un accéléromètre 3 axes à sortie numérique optimisé pour la surveillance de l'état des machines de Rohm Semiconductor. Il permet des mesures d'accélération à pleine échelle sélectionnables dans des plages de ±8g, ±16g, ±32g ou ±64g sur trois axes avec une interface hôte configurable qui prend en charge les communications série SPI et I2C. Il dispose également d'une technologie Advanced Data Path (ADP) qui permet au filtrage du bruit et au traitement du signal du capteur, généralement effectués par le MCU, d'être effectués par l'accéléromètre. Ils contribuent à réduire la charge du MCU et la consommation d'énergie tout en améliorant les performances des applications.
Le tableau à clic Accel 20™ convient à diverses applications telles que la surveillance des vibrations et de l'état, les tests et les mesures, la maintenance prédictive, etc.
How Does The Accel 20 Click Board™ Work?
The Accel 20 Click Board™ as its foundation uses the KX134-1211, a highly reliable digital triaxial acceleration sensor with a feature set optimized for machine condition monitoring from Rohm Semiconductor. The KX134-1211 is highly configurable with a programmable acceleration range of ±8/±16/±32/±64g providing signal conditioning and intelligent user-programmable application algorithms with improved linearity over the entire temperature range. It also has an Advanced Data Path (ADP) technology which allows noise filtering and sensor signal processing, usually carried out by the MCU, to be performed by the accelerometer. They contribute to reducing MCU load and power consumption together with improved application performance.
Acceleration sensing is based on the principle of a differential capacitance arising from the acceleration-induced motion of the sensing element, which is hermetically sealed at the wafer level by bonding a second silicon lid wafer to the device wafer, further utilizing a standard mode cancellation to decrease errors from process variation, temperature, and environmental stress.
The KX134-1211 also features an advanced Wake-Up and Back-to-Sleep detection with a high-resolution threshold capability configurable down to 15.6mg, 512-byte buffer that continues to record data even when being read, as well as embedded engines for orientation, directional/double-tap, and free-fall detection.
The Accel 20 Click Board™ allows using both I2C and SPI interfaces with a maximum frequency of 3.4MHz for I2C and 10MHz for SPI communication. The selection can be made by positioning SMD jumpers labeled as COMM SEL to an appropriate position. Note that all the jumpers' positions must be on the same side, or the Click board™ may become unresponsive. While the I2C interface is selected, the KX134-1211 allows choosing the least significant bit (LSB) of its I2C slave address using the SMD jumper labeled ADDR SEL. The Accel 20 Click Board™ also possesses two interrupts, I1 and I2, routed to the INT and AN pins on the mikroBUS™ used to signal MCU that an event has been sensed, and one trigger pin labeled as TRG, routed to the PWM pins on the mikroBUS™ socket, used for FIFO buffer control.
The Accel 20 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with 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 | Motion |
| Applications | The Accel 20 Click Board™ be used for various applications such as vibration and condition monitoring, test and measurements, predictive maintenance, and more |
| On-board modules | KX134-1211 - highly reliable digital triaxial acceleration sensor with a feature set optimized for machine condition monitoring from Rohm Semiconductor |
| Key Features | Low power consumption, high performance and resolution, high reliability, user-configurable 3-stage Advanced Data Path (ADP), integrated interrupt features, Excellent temperature performance with high shock survivability, selectable serial interface, and more |
| Interface | I2C,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 on the Accel 20 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| Interrupt 2 | I2 | 1 | AN | PWM | 16 | TRG | FIFO Control Trigger |
| NC | 2 | RST | INT | 15 | I1 | Interrupt 1 | |
| SPI Chip Select | CS | 3 | CS | RX | 14 | NC | |
| SPI Clock | SCK | 4 | SCK | TX | 13 | NC | |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | SCL | I2C Clock |
| SPI Data IN | SDI | 6 | MOSI | SDA | 11 | SDA | I2C Data |
| 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 |
| JP1-JP3 | COMM SEL | Left | Communication Interface Selection SPI/I2C: Left position SPI, Right position I2C |
| JP4 | ADDR SEL | Left | I2C Address Selection 1/0: Left position 1, Right position 0 |
ACCEL 20 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| Acceleration Range | ±8 | - | ±64 | g |
| Sensitivity | - | 4096 | - | counts/g |
| Resolution | - | 16 | - | bit |
| Operating Temperature Range | -40 | +25 | +105 | °C |
Software Support
We provide a library for the Accel 20 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on Mikroe Github account.
Library Description
This library contains API for the Accel 20 Click Board™ driver.
Key functions
-
accel20_get_axis_dataAccel 20 get accelerometer axis function. -
accel20_set_output_data_rateAccel 20 set output data rate function. -
accel20_set_accel_rangeAccel 20 set accel range function.
Example Description
This library contains API for the Accel 20 Click Board™ driver. The library initializes and defines the I2C or SPI bus drivers to write and read data from registers. The library also includes a function for reading X-axis, Y-axis, and Z-axis data.
void application_task ( void )
{
static accel20_axis_t axis;
if ( accel20_get_int_1( &accel20 ) == ACCEL20_INT1_DATA_READY )
{
accel20_get_axis_data( &accel20, &axis );
log_printf( &logger, "tX : %5d rntY : %5d rntZ : %5d rn", axis.x, axis.y, axis.z );
log_printf( &logger, "-------------------------rn" );
Delay_ms( 1000 );
}
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe Github account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Accel20
Additional Notes and Information
Depending on the development board you are using, you may need a USB UART click, 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 Accel 20 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.
Tableau de clic Accel 20
Frequently Asked Questions
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