Mikroelektronika d.o.o.
Carte à clic MUX 3
Carte à clic MUX 3
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Overview
Le MUX 3 Click Board™ est un multiplexeur à usage général qui permet de multiplexer un canal d'entrée vers huit canaux de sortie asymétriques. Grâce aux nombreuses options d'alimentation de fonctionnement du TMUX1208 de 1,08 V à 5,5 V et à la prise en charge des signaux d'E/S bidirectionnels, il vous permet de l'utiliser dans un large éventail d'applications allant de l'électronique personnelle aux applications d'automatisation des bâtiments telles que : le chauffage, les détecteurs de fumée, la ventilation, la climatisation, les équipements alimentés par batterie, l'audio grand public, etc.
La carte Click Board™ MUX 3 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™.
How Does The MUX 3 Click Board™ Work?
The MUX 3 Click Board™ is based around the TMUX1208 module, a 5-V Bidirectional 8:1, 1-Channel Multiplexer from Texas Instruments. The TMUX1208 is a general purpose complementary metal-oxide semiconductor (CMOS) multiplexer (MUX). Wide operating supply of 1.08 V to 5.5 V allows for use in a broad array of applications from personal electronics to building automation applications.
The device supports bidirectional analog and digital signals on the source (Sx) and drain (D) pins ranging from GND to VDD. All logic inputs have 1.8 V logic compatible thresholds, ensuring both TTL and CMOS logic compatibility when operating in the valid supply voltage range. Fail-Safe Logic circuitry allows voltages on the control pins to be applied before the supply pin, protecting the device from potential damage.
Break-before-make delay is a safety feature that prevents two inputs from connecting when the device is switching. The output first breaks from the on-state switch before making the connection with the next on-state switch. The time delay between the break and the make is known as break-before-make delay.
One useful application to take advantage of the TMUX1208 features is multiplexing various signals into an ADC that is integrated into a MCU. Utilizing an integrated ADC in a MCU allows a system to minimize cost with a potential tradeoff of system performance when compared to an external ADC. The multiplexer allows for multiple inputs/sensors to be monitored with a single ADC pin of the device, which is critical in systems with limited I/O.
Given all the features the TMUX1208 offers, the MUX 3 Click Board™ is best used for Analog and Digital Multiplexing / Demultiplexing, HVAC: Heating, Ventilation, and Air Conditioning, Smoke Detectors, Video Surveillance, Electronic Point of Sale, Battery-Powered Equipment, Appliances, and Consumer Audio.
The MUX 3 Click Board™ offers a selection between 3.3V and 5V operation, with the onboard SMD jumper, labelled as VCC SEL. This allows both 3.3V and 5V MCUs to be interfaced with this Click board™.
SPECIFICATIONS
| Type | DAC |
| Applications | Analog and Digital Multiplexing / Demultiplexing, HVAC: Heating, Ventilation, and Air Conditioning, Smoke Detectors, Video Surveillance, Electronic Point of Sale, Battery-Powered Equipment, Appliances, Consumer Audio |
| On-board modules | TMUX1208, a 5-V Bidirectional 8:1, 1-Channel Multiplexer from Texas Instruments |
| Key Features | Features such as the break-before-make switching action, electrostatic discharge protection up to 2kV, low on-resistance and low input current leakage, make this circuit a perfect solution for various switching applications, especially those that utilize differential signals |
| Interface | GPIO |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the MUX 3 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| Control pin 1 | A1 | 1 | AN | PWM | 16 | A2 | Control pin 2 |
| Control pin 0 | A0 | 2 | RST | INT | 15 | NC | |
| Enable Chip | EN | 3 | CS | RX | 14 | NC | |
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | NC | ||
| NC | 6 | MOSI | SDA | 11 | NC | ||
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL | Left | Power supply voltage selection: left position 3.3V, right position 5V |
We provide a library for the MUX 3 Click Board™ on our LibStock page, as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Library Description
The library covers all the necessary functions to control the MUX 3 Click Board™.
Key Functions
void mux3_setChannel( uint8_t selectChannel )- Set active MUX channel function.
Example Description
The application is composed of three sections :
- System Initialization - Initializes GPIO and LOG structures, sets AN, RST, CS and PWM pins as output and start to write log.
- Application Initialization - Initialization driver enable's - GPIO, also write log.
- Application Task - (code snippet) This is an example which demonstrates the use of MUX 3 Click board. Sets the current active and changes the channel every 1 sec. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on Usart Terminal changes for every 1 sec.
void applicationTask()
{
mikrobus_logWrite( "-------------------", _LOG_LINE );
mikrobus_logWrite( " Enable Channel: ", _LOG_LINE );
_displayLog( _MUX3_ENABLE_CHANNEL_S1 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S1 );
Delay_1sec();
_displayLog( _MUX3_ENABLE_CHANNEL_S2 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S2 );
Delay_1sec();
_displayLog( _MUX3_ENABLE_CHANNEL_S3 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S3 );
Delay_1sec();
_displayLog( _MUX3_ENABLE_CHANNEL_S4 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S4 );
Delay_1sec();
_displayLog( _MUX3_ENABLE_CHANNEL_S5 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S5 );
Delay_1sec();
_displayLog( _MUX3_ENABLE_CHANNEL_S6 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S6 );
Delay_1sec();
_displayLog( _MUX3_ENABLE_CHANNEL_S7 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S7 );
Delay_1sec();
_displayLog( _MUX3_ENABLE_CHANNEL_S8 );
mux3_setChannel( _MUX3_ENABLE_CHANNEL_S8 );
Delay_1sec();
mikrobus_logWrite( "-------------------", _LOG_LINE );
mikrobus_logWrite( " Disable ", _LOG_LINE );
mikrobus_logWrite( " All Channels ", _LOG_LINE );
mux3_setChannel( _MUX3_DISABLE_ALL_CHANNELS );
Delay_1sec();
}
Additional Functions :
void _displayLog( uint8_t selCh )Display logs on Usart Terminal.
The full application code, and ready to use projects can be found on our LibStock page.
Other mikroE Libraries used in the example:
- GPIO
- UART
- Conversions
Additional Notes and Information
Depending on the development board you are using, you may need 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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.
MIKROSDK
The MUX 3 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.
Frequently Asked Questions
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