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Mikroelektronika d.o.o.

I2C Extend Click-Platine

I2C Extend Click-Platine

Erweitert die I2C-Schnittstelle auf über 1 km!
SKU: MIKROE-4207
Normaler Preis
£22.40 GBP ohne MwSt
Normaler Preis £32.00 GBP Verkaufspreis
£22.40 GBP ohne MwSt
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Overview

Das I2C Extend Click Board™ ist eine kompakte Zusatzplatine für Anwendungen, bei denen der I2C-Kommunikationsbus über eine große Distanz verlängert werden muss. Diese Platine verfügt über den LTC4331 – einen I2C-Slave-Geräte-Extender über eine robuste Differenzialverbindung von Analog Devices. Es handelt sich um einen Punkt-zu-Punkt-SMBus-kompatiblen I2C-Slave-Geräte-Extender, der für den Betrieb in geräuschintensiven Industrieumgebungen entwickelt wurde und bis zu 1 MHz seriellen Takt, ±40 kV ESD-Schutz an Verbindungsstiften, wählbare Verbindungs-Baudraten und vieles mehr unterstützt. All diese Funktionen machen I2C Extend Click zu einer ausgezeichneten Wahl für verschiedene Anwendungen, bei denen der I2C-Bus über eine große Distanz verlängert werden muss, wie z. B. Sensorinstallation, Industriesteuerung, Beleuchtungssystemsteuerung, Soundsystemsteuerung und mehr.

Das I2C Extend 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.

How Does The I2C Extend Click Board™ Work?

The I2C Extend Click Board™ is based on the LTC4331, which is a point-to-point compatible I2C slave device extender designed for operation in high noise industrial environments. Using a ±60V fault protected differential transceiver, the LTC4331 can extend an I2C/SMBus bus, including remote interrupt function and a control signal, over a single twisted pair differential link. Thanks to selectable link baud rates, the I2C bus can be extended up to 1200m, depending on the link speed and external factors such as environmental noise level, humidity, cable quality, etc. Standard twisted-pair cables with RJ45 connectors can be used, the same as in the ethernet devices, etc.

i2c extend Click Board™ inner

Besides the I2C protocol extension, I2C Extend Click Board™ also supports local to remote control and interrupt functions. Local to remote control ensures that the values set on the local side CTRL pin propagate to the remote side CTRL pin over the differential link. Users can choose pin on the mikroBUS™ socket used for that purpose (CS or RST), using the onboard jumper named PIN SEL. Interrupt pin acts as an open-drain output in local mode and an input in remote mode. Basically, an interrupt signal on the INT pin in the I2C Extend Click is mirrored from the remote network to the local network using the differential link. On the remote side INT is an input pin that can be connected to remote I2C slave devices, while on the local side, it is operating as an open-drain output that can be connected to a shared local interrupt line.

Because of the dual functionality of the I2C Extend Click, the user needs to set the mode of operation of the Click board™. That is easily achieved using the onboard MODE switch, with two positions: local mode (LCL), where this Click board™ is in I2C slave mode and remote mode (RMT) where this Click board™ is in I2C master mode. Besides mode selection, I2C Extend Click can also link speed and I2C address selection jumpers onboard, named "SPEED SEL" and "ADDR SEL", respectively.

The I2C Extend Click Board™ has Link status (LINK) and ready status (RDY) LEDs, making troubleshooting as easy as possible. In remote mode, LINK LED is active when the device establishes link communication. When in local mode, LINK LED is active after the LTC4331's I2C interface has joined the I2C bus in addition to establishing link communication.The RDY LED is active after the device's I2C interface has joined the bus.

The I2C Extend Click Board™ is designed to operate with both 3.3V and 5V logic 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 Interface
Applications Excellent choice for various applications that require extending the I2C bus over a long distance, such as sensor installation, industrial control, lighting system control, sound system control, and more.
On-board modules LTC4331 - an I2C slave device extender over rugged differential link, from Analog Devices
Key Features Designed for operation in high noise industrial environments while supporting Up to 1MHz serial clock, ±40kV ESD protection on link pins, selectable link baud rates and many more
Interface GPIO,I2C
Compatibility mikroBUS
Click board size L (57.15 x 25.4 mm)
Input Voltage 3.3V or 5V

PINOUT DIAGRAM

This table shows how the pinout of the I2C Extend Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
NC 1 AN PWM 16 NC
Reset pin RST 2 RST INT 15 INT Interrupt pin
SPI Chip Select CS 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
LD2 RDY - Ready status LED Indicator
LD3 LINK - Link status LED Indicator
JP1 VCC SEL Left Power Supply Voltage Selection: left position 3v3, right position 5v
JP2, JP3 ADDR SEL Left Communication interface selection: left position 0, right position 1
JP6, JP7 SPEED SEL Left Communication speed selection: left position 0, right position 1
SW1 PIN SEL - Local to remote control pin selection

I2C EXTEND CLICK ELECTRICAL SPECIFICATIONS

Description Min Typ Max Unit
Supply Voltage 3 3.3 5.5 V
Extension Range - - 1200 m
Serial Clock Frequency - - 1 MHz

 

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