click USB adapter

How does it work?

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 1×8 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.

Specifications

Pinout diagram

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).

Notes	Pin					Pin	Notes
Analog or GPIO	AN	1	AN	PWM	16	PWM	PWM
Reset	RST	2	RST	INT	15	INT	Interrupt
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
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

click USB adapter electrical specifications