click USB adapter is a compact Shield board that provides the necessary interface for connecting Click boards™ to your PC through the USB connection. This board features the FT2232H, a dual high-speed USB to a multipurpose UART/FIFO IC from FTDI Chip. The click USB adapter allows Click boards™ with SPI, I2C, UART, and other interfaces to communicate with the computer equipped with the standard USB interface. This shield makes the perfect solution for secure and reliable connection of the Click boards™ to your PC through a high-speed USB connection, without the need for a microcontroller as a mediator.
click USB adapter can be especially interesting for the development systems that are not equipped with a mikroBUS™ socket, such as personal computers, Raspberry Pi’s, similar SBCs, and others. Using the click USB adapter on such systems will significantly improve its usability by adding a mikroBUS™ socket. This click USB adapter is a fully tested product, ready for use on a system equipped with the standard USB interface.
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click USB adapter is based on the FT2232H, a dual high-speed USB to a multipurpose UART/FIFO IC from FTDI Chip. The entire USB protocol is handled on the chip, with no USB-specific firmware programming requirements, but requires USB device drivers for operation available free from the official FTDI page. It can work at high speed (480Mbps) and full speed (12Mbps), depending on the usage, alongside a dual Multi-Protocol Synchronous Serial Engine (MPSSE) used to simplify synchronous serial protocol between USB and available interfaces.
The FT2232H provides the necessary communication lines defined by the mikroBUS™ standard. The mikroBUS™ host connector consists of two 1x8 female headers with SPI (MOSI, MISO, SCK, CS), I2C (SDA, SCL), UART (Tx, Rx), RST, PWM, Analog and Interrupt lines as well as 3.3V, 5V, and GND power lines. This connector allows connection of all of the Click boards™ from the MikroE lineup. The J1 jumper selects whether UART or I2C interface will be used. For visual presentation, this board features a TX/RX LED that will indicate the data transfer. The FT2232H at disposal has a CAT93C46, a 1Kbit microwire serial EEPROM from Catalyst Semiconductor. The operational configuration mode and USB Description strings of the FT2232H are configurable in external EEPROM over the USB interface.
In addition, the click USB adapter features an MCP3204, a 4-channel 12-bit AD converter with SPI serial interface from Microchip. This ADC communicates to the FT2232H over the SPI serial interface and adds analog readings of the Click boards™ to the FT2232H, thus to the host computer. There is also a J2 onboard jumper used for selecting whether the AN pin on the mikroBUS™ socket will be just another GPIO pin or connected to the MCP3204 AD converter circuit, thus serving for analog readings.
click USB adapter board can be powered through a USB cable only. Onboard power circuitry generates 3.3V and 5V, necessary for different Click board™ types.
Can be used for secure and reliable connecting Click boards™ to your PC through a high-speed USB connection, without the need for microcontroller as a mediator
FT2232H - high-speed USB to multipurpose UART/FIFO IC from FTDI Chip
CAT93C46 - 1Kbit microwire serial EEPROM from Catalyst Semiconductor
MCP3204 - 4-channel 12-bit AD converter with SPI serial interface from Microchip
Provides necessary communication lines defined by the mikroBUS™ standard, onboard circuitry that generates 3.3V and 5V, AD converter brings support for analog input, power and RX/TX LEDs indicators, and more
This table shows how the pinout on click USB adapter corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
|Analog or GPIO||AN||1||AN||PWM||16||PWM||PWM|
|SPI Chip Select||CS||3||CS||RX||14||TX||UART TX|
|SPI Clock||SCK||4||SCK||TX||13||RX||UART RX|
|SPI Data OUT||SDO||5||MISO||SCL||12||SCL||I2C Clock|
|SPI Data IN||SDI||6||MOSI||SDA||11||SDA||I2C Data|
|Power Supply||3.3V||7||3.3V||5V||10||5V||Power Supply|
|-||PWR||-||Power LED Indicator|
|-||TX/RX||-||TX/RX LED Indicator|
|J1||-||Upper||Communication Interface Selection UART/I2C: Upper position UART, Lower position I2C|
|J2||-||Upper||Communication Interface Selection BC0/VIN: Upper position BC0, Lower position VIN|
|Supply Voltage Over USB Connector||-||5||-||V|
|Supply Voltage for the Click boards™||3.3||-||5||V|
|FT2232H Data Rate||-||-||12||Mbps|