MikroElektronika

Figure 1: USB UART additional board

FP1

FERRITE

CN1

USBDM

USBDP

RX-MCU

DTR

DCD

DSR

RI

RTS-MCU

TX-MCU

CTS-MCU

P3

P1

P0

P2

P4

OSCIDTR#

OSCOTXD

TEST

VCC

RTS#

DSR#

AGND

RESET#

VCCIO

DCD#

NC

GND

RXD

CTS#

CBUS1

USBDM

GND

CBUS2

GND

USBDP

NC

CBUS3

CBUS0

3V3OUT

RI#

CBUS4

FT232RL

U1

3V3OUT

C4

100nF

C1

C2

100nF

100nF

VCCIO

E1

10uF

VCCIO

RX-MCU

DT

R RI

TX-MCU

P4

DC

D

CTS-MCU

P3

DS

R

P1

RTS-MCU

P2

P0

CN2

CN3

J6

VCC

3V3OUT

VCC

VCCIO

22.1

6mm

26.92mm

Figure 3: USB UART additional board connection schematic

Figure 4: Dimensions of the board

How to connect the board?

The USB UART additional board is connected to USB devices via the USB MINIB connector CN1. Connection with the microcontroller is established via a 1x6 connector CN2 and 1x9 connector CN3. Jumper J6 is used to select a logic level to be sent to the VCCIO pin on 1x6 connector CN2. This logic level may be 3.3V or 5V.

USB UARTThe USB UART additional board is used to connect USB devices to the UART module built into the microcontroller.

Key features:

- Serial data transfer via UART communication; - 5V DC power supply voltage; - Low power consumption; etc.