MIKROE-1205 mikroElektronika, MIKROE-1205 Datasheet - Page 22

• Manufacturer Part Number: MIKROE-1205
• Description: Development Boards & Kits - PIC / DSPIC EasyPIC FUSION v7 dsPIC33 PIC24 PIC32
• Manufacturer: mikroElektronika

Specifications of MIKROE-1205

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: PIC24x, dsPIC33x, PIC32MX4xx, PIC32MX7xx
• Interface Type: CAN, I2C, SPI
• Operating Supply Voltage: 7 V to 23 V
• Data Bus Width: 16 bit, 32 bit
• Dimensions: 266 mm x 220 mm
• For Use With: PIC24x, dsPIC33x, PIC32MX4xx, PIC32MX7xx

USB-UART A
page 22
Enabling USB-UART A
In order to enable USB-UART A
communication you must push
SW12.1 and SW12.2 to ON
position. This connects the RX
and TX lines to RF5 and RF4
microcontroller pins.
DATA BUS
RF5
RF4
The UART (universal asynchronous receiver/trans-
mitter) is one of the most common ways of exchanging
data between the MCU and peripheral components. It is a serial
protocol with separate transmit and receive lines, and can be used for
full-duplex communication. Both sides must be initialized with the
same baud rate, otherwise the data will not be received correctly.
Modern PC computers, laptops and notebooks are no longer
equipped with RS-232 connectors and UART controllers. They
are nowadays replaced with USB connectors and USB
controllers. Still, certain technology enables UART
communication to be done via USB connection.
Controllers such as FT232RL from FTDI convert
UART signals to the appropriate USB standard.
USB-UART A communication is being done
through a FT232RL controller, USB connector
(CN22), and microcontroller UART module. To
establish this connection, you must connect RX and
TX lines of the FT232RL to the appropriate pins of
the microcontroller. This selection is done using DIP
switches SW12.1 and SW12.2.
SW12
Figure 8-1:
USB-UART A
connection
schematic
TX-FTDI1
RX-FTDI1
VCC-3.3V
10
11
12
13
14
1
2
3
4
5
6
7
8
9
VCC-3.3V
U2
FT232RL
TXD
DTR#
RTS#
VCCIO
RXD
RI#
GND
NC
DSR#
DCD#
CTS#
CBUS4
CBUS2
CBUS3
C6
100nF
FT232RL
VCC-5V
C7
100nF
RESET#
3V3OUT
USBDM
CBUS0
CBUS1
USBDP
VCC-5V
OSCO
AGND
OSCI
TEST
GND
GND
VCC
NC
E1
10uF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC-5V
RX-LED1
TX-LED1
DVD://download/eng/software/development-tools/
universal/ftdi/vcp_drivers.zip
VCC-3.3V
C11
100nF
can be found on
R14
2K2
LD69
RX
FTDI1-D_N
FTDI1-D_P
you must first install FTDI drivers on your computer. Drivers
VCC-3.3V
In order to use USB-UART A module on EasyPIC Fusion
R15
4K7
LD70
TX
Product DVD:
R18
1K0
R21
2K2
VCC
D-
D+
GND
1
2
3
4
CN22
USB B
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