MUX 3 CLICK
PID: MIKROE-3916
Weight: 18 g
MUX 3 Click is the general purpose multiplexer which offers multiplexing
one input channel to eight single-ended output channels. Given the
TMUX1208 wide operating supply options from 1.08 V to 5.5 V and support
of bidirectional I/O signals, its allowing you use in a broad array of
applications ranging from personal electronics to building automation
applications such as: Heating, Smoke Detectors, Ventilation, Air
Conditioning, Battery-Powered Equipment, Consumer Audio, etc.
MUX 3 Click board™ is supported by a mikroSDK compliant library, which
includes functions that simplify software development. This Click board™
comes as a fully tested product, ready to be used on a system equipped
with the mikroBUS™ socket.
HOW DOES IT WORK?
MUX 3 Click is a Click board™ 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 is best used for Analog
and Digital Multiplexing / Demultiplexing, HVAC: Heating, Ventilation, and Air
Conditioning, Smoke Detectors, Video Surveillance, Electronic Point of Sale, BatteryPowered Equipment, Appliances, and Consumer Audio.
MUX 3 Click offers a selection between 3.3V and 5V operation, with the onboard SMD
jumper, labeled 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,5V
PINOUT DIAGRAM
This table shows how the pinout on MUX 3 Click corresponds to the pinout on the
mikroBUS™ socket (the latter shown in the two middle columns).
Notes
Pin
Pin
Control pin 1
A1
1
AN
PWM
16
A2
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
Ground
GND
8
GND
GND
9
GND
Notes
Control pin 2
Power Supply
Ground
ONBOARD SETTINGS AND INDICATORS
Label
Name
Default
LD1
PWR
-
JP1
VCC SEL
Left
Description
Power LED Indicator
Power supply voltage selection: left position 3.3V,
right position 5V
SOFTWARE SUPPORT
We provide a library for the MUX 3 Click 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 MUX 3 Click board.
Key functions:
void mux3_setChannel( uint8_t selectChannel ) - Set active MUX channel function.
Examples 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 informations
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
This 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.
For more information about mikroSDK, visit the official page.
https://www.mikroe.com/mux‐3‐click/1‐28‐20