Mikroelektronika d.o.o.
Carte Click USB vers I2C
Carte Click USB vers I2C
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Key Features
- Périphérique USB de classe HID à pleine vitesse, compatible USB 2.0 avec l'intégralité du protocole USB géré sur la puce, pris en charge par la plupart des systèmes d'exploitation, aucun pilote personnalisé n'est requis, interface maître I2C, fonctionnement autonome, etc.
- Basé sur le FT260 - périphérique USB qui prend en charge la communication I2C et UART via les interfaces de classe USB HID standard de FTDI
- Peut être utilisé comme pont entre l'USB et les périphériques UART ou I2C
- mikroBUS : interfaces I2C et UART
Overview
La carte Click Board™ USB vers I2C est une carte complémentaire compacte dotée d'une interface série USB vers I2C à usage général. Cette carte comprend le FT260, un contrôleur de périphérique d'interface qui fournit un pont entre les pilotes de classe USB Human Interface Device (HID) standard et un périphérique esclave I2C ou UART de FTDI. Le FT260 est hautement intégré avec un émetteur-récepteur pleine vitesse (12 Mbps) compatible USB 2.0, un oscillateur, un régulateur LDO et un eFUSE intégré. Il est pris en charge par la plupart des systèmes d'exploitation où un pilote personnalisé n'est pas requis. Avec la possibilité d'être utilisé comme périphérique autonome, cette carte Click™ fournit un pont idéal et rapide à mettre en œuvre entre l'USB et les périphériques UART ou I2C.
La carte Click™ USB vers I2C 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 de la prise mikroBUS™.
How Does The USB to I2C Click Board™ Work?
The USB to I2C Click Board™ as its foundation uses the FT260, a USB device that supports I2C and UART communication through standard USB HID class interfaces from FTDI. It provides the bridge function between a standard USB HID class driver and an I2C or UART slave device. This highly integrated IC comes with a USB2.0 compliant full-speed transceiver, oscillator as the source of the operating clock, LDO regulator for the entire chip operating power source, eFUSE for basic customization, and automatic scanning mechanism of EEPROM for advanced customization. The USB HID class is natively supported by most operating systems with no requirements for custom drivers.
The USB to I2C Click Board™ can communicate with MCU via UART or I2C interface. The FT260 uses the UART interface with commonly used UART RX and TX pins and hardware flow control pins UART CTS and RTS (Clear to Send and Ready to Send) to transmit and exchange data with the host MCU or using the I2C interface, which can also act as a Master with a maximum I2C bus speed of up to 3.4Mbit/s. These two interfaces exist concurrently and can be selected independently according to the application.
In addition, the USB to I2C Click Board™ also has an active-low reset signal routed on the RST pin of the mikroBUS™ socket that activates a hardware reset of the chip and a possibility of a remote wake-up function. If the operating system supports remote wake-up and allows external hardware to wake it, the FT260 can be resumed by the INT pin, defaulted as wake-up, triggering a resume signal on the USB bus to wake up the USB host. If this function is not used, this pin behaves like a standard interrupt pin.
The USB to I2C Click Board™ can operate with both 3.3V and 5V logic voltage levels. Considering that the board can be powered via USB and used as a standalone device (USB active voltage level is visually indicated with a blue LED marked USB IN), using an additional LDO, the TLV1117, in this way, the existence of the voltage of both mikroBUS™ power lines is ensured. An LDO and both mikroBUS™ power rails also have protection in the form of MAX40200 diodes to prevent any unwanted back voltage.
The USB to I2C Click Board™ must complete the proper logic voltage level conversion before use with MCUs with different logic levels. However, 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 | USB |
| Applications | Can be used as a bridge between USB and either UART or I2C peripherals |
| On-board modules | FT260 - USB device that supports I2C and UART communication through standard USB HID class interfaces from FTDI |
| Key Features | Full speed HID class USB device, USB2.0 compliant with entire USB protocol handled on the chip, supported by most operation systems, custom driver is not required, I2C Master interface, standalone operation, and more |
| Interface | I2C,UART,USB |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the USB to I2C Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| UART CTS | CTS | 1 | AN | PWM | 16 | RTS | UART RTS |
| RESET | RST | 2 | RST | INT | 15 | INT | Wake-up / Interrupt |
| NC | 3 | CS | RX | 14 | TX | UART TX | |
| NC | 4 | SCK | TX | 13 | RX | UART RX | |
| 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 | USB IN | - | USB Active LED Indicator |
USB TO I2C CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Data Rate | - | - | 12 | Mbps |
| Operating Temperature Range | -40 | +25 | +85 | °C |
Frequently Asked Questions
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