Mikroelektronika d.o.o.
Carte I2C MUX 6 Click
Carte I2C MUX 6 Click
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Key Features
Overview
La carte Click Board™ I2C MUX 6 est une carte complémentaire compacte représentant un sélecteur bidirectionnel dédié aux applications de conflits d'adresses esclaves I2C. Cette carte comprend le PCA9518, un tampon bidirectionnel extensible à cinq canaux contrôlé par le bus I2C de Texas Instruments. Le PCA9518 surmonte la restriction de la capacité maximale du bus en séparant et en mettant en mémoire tampon les lignes de données I2C (SDA) et d'horloge (SCL) en plusieurs groupes de canaux I2C de 400 pF. Il active le canal souhaité via une broche d'activation donnée et permet l'extension du bus I2C, via un en-tête d'extension intégré, en mettant en mémoire tampon les lignes de données (SDA) et d'horloge (SCL), ce qui permet un nombre pratiquement illimité de bus de 400 pF. Cette carte Click™ convient à diverses applications industrielles, médicales, de communication et automobiles.
La carte Click Board™ I2C MUX 6 est prise en charge par une bibliothèque compatible mikroSDK, qui comprend des fonctions qui simplifient le développement logiciel. Cette carte Click™ est livrée sous la forme d'un produit entièrement testé, prêt à être utilisé sur un système équipé du socket mikroBUS™.
| General Information | |
|---|---|
Part Number (SKU) |
MIKROE-5168
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Manufacturer |
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| Physical and Mechanical | |
Weight |
0.02 kg
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| Other | |
Country of Origin |
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HS Code Customs Tariff code
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EAN |
8606027388583
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Warranty |
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How Does The I2C MUX 6 Click Board™Work?
The I2C MUX 6 Click Board™ as its foundation uses the PCA9518, an expandable four-channel bidirectional buffer controllable through the I2C serial interface from Texas Instruments. The primary SCL/SDA signal pair is directed to four channels where only one SCL/SDA channel can be selected at a time, determined on the state of the four Enable pins, routed to the AN, RST, CS, and PWM pins of the mikroBUS™ socket. The PCA9518 overcomes the restriction of maximum bus capacitance by separating and buffering the I2C data (SDA) and clock (SCL) lines into multiple groups of 400pF I2C channels.
The PCA9518 has several multi-directional open-drain buffers designed to support the standard low-level-contention arbitration of the I2C bus. Except during arbitration, the PCA9518 acts like a pair of non-inverting open-drain buffers, one for SDA and one for SCL. It can communicate with other PCA9518 hubs through a 4-wire inter-hub expansion bus, located on the onboard header with EXP labelled pins, i.e., permits extension of the I2C-bus by buffering both the data (SDA) and the clock (SCL) lines enabling virtually an unlimited number of buses of 400pF.
The PCA9518 communicates with MCU using the standard I2C interface that supports Standard-Mode (100 kHz) and Fast-Mode (400 kHz) operation. As mentioned before, each Enable pin, ENx, controls its associated SDAx and SCLx channels. When the ENx pin is in a low logic state, it isolates its corresponding SDAx and SCLx lines from the system by blocking the inputs from SDAx and SCLx and disabling the output drivers on these lines. It is essential that the ENx change state only when both the global bus and the local port are in an IDLE state to prevent system failures.
The I2C MUX 6 Click Board™is designed for 3.3V operation. It also has onboard terminals labelled as VCC-I2C to supply a voltage, 3.3V or 5V, for PCA9518's I2C lines, which are 5V-tolerant. However, the board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. 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 | I2C |
| Applications | Can be used for various applications from industrial to medical, communications, and automotive systems |
| On-board modules | PCA9518 - four-channel bidirectional buffer controllable through the I2C serial interface from Texas Instruments |
| Key Features | Low power consumption, fast I2C interface, 5V tolerant I2C and enable pins to support mixed-mode signal operation, powered-off high-impedance I2C pins, expansion bus, and more |
| Interface | I2C |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V |
PINOUT DIAGRAM
This table shows how the pinout of the I2C MUX 6 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| Channel 1 Enable | EN1 | 1 | AN | PWM | 16 | EN4 | Channel 4 Enable |
| Channel 2 Enable | EN2 | 2 | RST | INT | 15 | NC | |
| Channel 3 Enable | EN3 | 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 | NC | |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| J1 | - | Populated | I2C Expansion Header |
I2C MUX 6 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| I2C Bus Voltage Range VCC-I2C | 3.3 | - | 5 | V |
| Operating Temperature Range | -40 | +25 | +85 | °C |
Frequently Asked Questions
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