Mikroelektronika d.o.o.
I2C MUX 4 Click-Platine
I2C MUX 4 Click-Platine
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Overview
Der I2C MUX 4 Click Board™ ist eine kompakte Zusatzplatine, die einen dualen bidirektionalen Übersetzungsschalter enthält, der für Anwendungen mit I2C-Slave-Adresskonflikten vorgesehen ist. Diese Platine verfügt über den TCA9543APWR, einen Niederspannungs-2-Kanal-I2C-Busschalter mit Interrupt-Logik von Texas Instruments. Die Master-SCL/SDA-Signale werden an zwei nachgeschaltete Paare oder Kanäle geleitet, wobei entweder ein einzelner SCL/SDA-Kanal oder beide Kanäle durch Einstellen des programmierbaren Steuerregisters ausgewählt werden können. Es verfügt über zwei Interrupts und einen Reset-Eingang, der es dem TCA9543A ermöglicht, sich von einer Situation zu erholen, in der einer der nachgeschalteten I2C-Busse in einem niedrigen Zustand feststeckt. Dieses Click Board™ eignet sich für die Arbeit mit I2C-Schnittstellen für Anwendungen wie Fehlerisolierung, Adresskonflikte, Pegelübersetzung oder Broadcast-Kommunikation.
Das I2C MUX 4 Click Board™ wird von einer mikroSDK-kompatiblen Bibliothek unterstützt, die Funktionen enthält, die die Softwareentwicklung vereinfachen. Dieses Click Board™ wird als vollständig getestetes Produkt geliefert und ist bereit für den Einsatz auf einem System, das mit der mikroBUS™-Buchse ausgestattet ist.
| General Information | |
|---|---|
Part Number (SKU) |
MIKROE-4240
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Manufacturer |
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| Physical and Mechanical | |
Weight |
0.017 kg
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| Other | |
Country of Origin |
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HS Code Customs Tariff code
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EAN |
8606027380334
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Warranty |
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How Does The I2C MUX 4 Click Board™ Work?
The I2C MUX 4 Click Board™ is based on the TCA9543APWR, a 2-channel, bidirectional translating I2C switch from Texas Instruments. The master SCL/SDA signal pair is directed to two channels of slave devices SC0/SD0 - SC1/SD1 where either individual channel or both channels can be selected determined by the programmable control register. The TCA9543APWR supports interrupt signals for the Master to detect an interrupt that can result from any of the slave devices connected to the interrupt pins on the output I2C channel header. It features I2C control using a single 8-bit control register in which bits 1 and 0 control the enabling and disabling of the two switch channels of I2C data flow, it supports a reset function, hot insertion, and has all switch channels deselected during Power-Up.
The I2C MUX 4 Click Board™ includes a low dropout linear regulator AP7331 from Diodes Incorporated to provide the 2.45V supply voltage for the TCA9543APWR. When the TCA9543APWR is turned on for the first time or anytime the device needs to be reset by cycling the power supply, which means that the Power-On reset requirements must be followed to ensure the I2C bus logic is initialized properly. The TCA9543APWR can also be reset to its default conditions by using the Power-On reset feature in the event of a glitch or data corruption.
The I2C MUX 4 Click Board™ communicates with MCU using the standard I2C 2-Wire interface that supports Standard-Mode (100 kHz) and Fast-Mode (400 kHz) operation. The TCA9543APWR generates a programmable interrupt signal routed on the INT pin of the mikroBUS™ used for the Master to detect an interrupt which can result from any of the slave devices connected to the output I2C channel pins. It also has two address pins that allow the choice of the least significant bit (LSB) of its I2C slave address which can be done by using the SMD jumper labelled as ADDR SEL, and a Reset function routed on the RST pin of the mikroBUS™ socket used to recover the TCA9543APWR from a bus-fault condition.
The I2C MUX 4 Click Board™ is designed to be operated with both 3.3V and 5V logic voltage levels that can be selected via VCC SEL jumper. This allows for both 3.3V and 5V capable MCUs to use the I2C communication lines properly.
SPECIFICATIONS
| Type | I2C |
| Applications | Can be used with I2C interfaces for applications such as fault isolation, address conflict, level translation, or broadcast communication. |
| On-board modules | The I2C MUX 4 Click Board™ is based on the TCA9543APWR, a 2-channel, bidirectional translating I2C switch from Texas Instruments. |
| Key Features | 1-of-2 bidirectional translating switches, low Stand-By current, support hot insertion, deselected channels during Power-Up, and more. |
| Interface | I2C |
| Compatibility | mikroBUS |
| Click board size | S (28.6 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the I2C MUX 4 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| Reset | RST | 2 | RST | INT | 15 | INT | Interrupt |
| NC | 3 | CS | RX | 14 | NC | ||
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| 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 3V3/5V: Left position 3V3, Right position 5V |
| JP2-JP3 | ADDR SEL | Left | Communication Interface Selection: Left position 0, Right position 1 |
| J1 | - | - | Output I2C Channel Pins |
I2C MUX 4 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | -0.5 | - | 7 | V |
| Maximum Output Current | - | - | ±20 | mA |
| Maximum Frequency | - | - | 400 | kHz |
| Maximum Power Dissipation | - | - | 400 | mW |
| Operating Temperature Range | -40 | - | +85 | °C |
Frequently Asked Questions
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