Mikroelektronika d.o.o.
USB-auf-I2C-Click-Platine
USB-auf-I2C-Click-Platine
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Key Features
- USB-Gerät der HID-Klasse mit voller Geschwindigkeit, USB 2.0-kompatibel mit vollständigem USB-Protokoll, das auf dem Chip verarbeitet wird, wird von den meisten Betriebssystemen unterstützt, kein benutzerdefinierter Treiber erforderlich, I2C-Masterschnittstelle, Standalone-Betrieb und mehr
- Basierend auf dem FT260 - USB-Gerät, das I2C- und UART-Kommunikation über standardmäßige USB-HID-Klassenschnittstellen von FTDI unterstützt
- Kann als Brücke zwischen USB und UART- oder I2C-Peripheriegeräten verwendet werden
- mikroBUS: I2C- und UART-Schnittstellen
Overview
Das USB-zu-I2C-Click-Board™ ist eine kompakte Zusatzplatine mit einer universellen USB-zu-I2C-Seriellschnittstelle. Diese Platine verfügt über den FT260, einen Schnittstellengeräte-Controller, der eine Brücke zwischen standardmäßigen USB-Treibern der Human Interface Device-Klasse (HID) und einem I2C- oder UART-Slave-Gerät von FTDI bildet. Das FT260 ist hochintegriert mit einem USB 2.0-kompatiblen Full-Speed-Transceiver (12 Mbit/s), Oszillator, LDO-Regler und On-Chip-eFUSE. Es wird von den meisten Betriebssystemen unterstützt, für die kein benutzerdefinierter Treiber erforderlich ist. Mit der Möglichkeit der Verwendung als eigenständiges Gerät bietet dieses Click-Board™ eine ideale, schnell zu implementierende Brücke zwischen USB und UART- oder I2C-Peripheriegeräten.
Das USB-auf-I2C-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 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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