Intermediate
30 min

Experience the art of signal convergence with TMUX1208 and PIC32MZ2048EFM100

Where signals converge, choices expand!

MUX 3 Click with Curiosity PIC32 MZ EF

Published Jul 22, 2025

Click board™

MUX 3 Click

Dev. board

Curiosity PIC32 MZ EF

Compiler

NECTO Studio

MCU

PIC32MZ2048EFM100

Crafted for versatility and precision, our general-purpose CMOS multiplexer empowers you to effortlessly manage and direct various signals, expanding your options for seamless connectivity

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Hardware Overview

How does it work?

MUX 3 Click is based on the TMUX1208, 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). A wide operating supply of 1.08 V to 5.5 V allows use in various 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 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 switching devices. 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 the break-before-make delay. One useful application for the TMUX1208 features is multiplexing various signals into an ADC integrated into an MCU. Utilizing an integrated ADC in the 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, Battery-Powered Equipment, Appliances, Consumer Audio. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC 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.

MUX 3 Click top side image
MUX 3 Click bottom side image

Features overview

Development board

Curiosity PIC32 MZ EF development board is a fully integrated 32-bit development platform featuring the high-performance PIC32MZ EF Series (PIC32MZ2048EFM) that has a 2MB Flash, 512KB RAM, integrated FPU, Crypto accelerator, and excellent connectivity options. It includes an integrated programmer and debugger, requiring no additional hardware. Users can expand

functionality through MIKROE mikroBUS™ Click™ adapter boards, add Ethernet connectivity with the Microchip PHY daughter board, add WiFi connectivity capability using the Microchip expansions boards, and add audio input and output capability with Microchip audio daughter boards. These boards are fully integrated into PIC32’s powerful software framework, MPLAB Harmony,

which provides a flexible and modular interface to application development a rich set of inter-operable software stacks (TCP-IP, USB), and easy-to-use features. The Curiosity PIC32 MZ EF development board offers expansion capabilities making it an excellent choice for a rapid prototyping board in Connectivity, IOT, and general-purpose applications.

Curiosity PIC32MZ EF double side image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC32

MCU Memory (KB)

2048

Silicon Vendor

Microchip

Pin count

100

RAM (Bytes)

524288

Used MCU Pins

mikroBUS™ mapper

MUX Control 1
RPB4
AN
MUX Control 0
RA9
RST
Chip Enable
RPD4
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
MUX Control 2
RPE8
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

MUX 3 Click Schematic schematic

Step by step

Project assembly

Curiosity PIC32MZ EF front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Curiosity PIC32 MZ EF as your development board.

Curiosity PIC32MZ EF front image hardware assembly
GNSS2 Click front image hardware assembly
Prog-cut hardware assembly
GNSS2 Click complete accessories setup image hardware assembly
Board mapper by product7 hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
Curiosity PIC32 MZ EF MCU Step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

Software Support

Library Description

This library contains API for MUX 3 Click driver.

Key functions:

  • mux3_set_channel - Set active MUX channel function

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 MUX 3 Click example
 * 
 * # Description
 * This application sets multiplexing one input channel to eight single-ended output channels. 
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initialization driver enable's - GPIO, also write log.
 * 
 * ## Application Task  
 * 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.
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "mux3.h"

// ------------------------------------------------------------------ VARIABLES

static mux3_t mux3;
static log_t logger;

// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void )
{
    log_cfg_t log_cfg;
    mux3_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.

    mux3_cfg_setup( &cfg );
    MUX3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    mux3_init( &mux3, &cfg );
}

void application_task ( void )
{
    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S1 );
    log_printf( &logger, "Active channel: S1\r\n" );
    Delay_1sec( );

    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S2 );
    log_printf( &logger, "Active channel: S2\r\n" );
    Delay_1sec( );

    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S3 );
    log_printf( &logger, "Active channel: S3\r\n" );
    Delay_1sec( );

    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S4 );
    log_printf( &logger, "Active channel: S4\r\n" );
    Delay_1sec( );

    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S5 );
    log_printf( &logger, "Active channel: S5\r\n" );
    Delay_1sec( );

    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S6 );
    log_printf( &logger, "Active channel: S6\r\n" );
    Delay_1sec( );

    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S7 );
    log_printf( &logger, "Active channel: S7\r\n" );
    Delay_1sec( );

    mux3_set_channel( &mux3, MUX3_ENABLE_CHANNEL_S8 );
    log_printf( &logger, "Active channel: S8\r\n" );
    Delay_1sec( );
    
    mux3_set_channel( &mux3, MUX3_DISABLE_ALL_CHANNELS );
    log_printf( &logger, "Active channel: none\r\n" );
    log_printf( &logger, "-------------------\r\n" );
    Delay_1sec( );
}

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

Additional Support

Resources

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