Download USB UART User Manual

USB UART
The 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.
Figure 1: USB UART additional 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.
CN3
RI
DCD
DSR
DTR
P4
P3
P2
P1
P0
26.92mm
RTS-MCU
TX-MCU
RX-MCU
TX-MCU
CTS-MCU
RTS-MCU
VCCIO
CN2
OSCO
TXD
DTR
DTR#
OSCI
RTS#
TEST
VCCIO
AGND
RI#
CBUS0
GND
CBUS1
E1
100nF
10uF
P0
P1
GND
NC
DSR
VCCIO
C4
NC
RXD
RI
3V3OUT
DSR#
VCC
DCD#
RESET#
Figure 4: Dimensions of the board
VCC
C2
DCD
CTS-MCU
GND
CTS#
P4
P2
P3
CBUS4
3V3OUT
CBUS2
USBDM
CBUS3
USBDP
FT232RL
VCC
VCCIO
100nF
FP1
FERRITE
CN1
USBDP
USBDM
C1
100nF
3V3OUT
J6
Figure 3: USB UART additional board connection schematic
MikroElektronika
22.16mm
U1
RX-MCU