MIKROE-995 mikroElektronika, MIKROE-995 Datasheet - Page 22

• Manufacturer Part Number: MIKROE-995
• Description: Development Boards & Kits - PIC / DSPIC EasyPIC PRO v7
• Manufacturer: mikroElektronika

Specifications of MIKROE-995

• Rohs: yes
• Product: Development Boards
• Interface Type: I2C, SPI
• Operating Supply Voltage: 7 VAC to 23 VAC, 9 VDC to 32 VDC

UART via RS-232
page 22
In
communication, you must push
SW5.3 (RG1) and SW5.4 (RG2)
to ON position. This connects the
RX and TX lines to appropriate
microcontroller pins and its second
UART module.
Enabling RS-232
order
to
enable
RS-232
The
transmitter) 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 baudrate, otherwise the data will not be
received correctly.
RS-232 serial communication is performed through a 9-pin
SUB-D connector and the microcontroller UART module. In
order to enable this communication, it is necessary
to establish a connection between RX and TX
lines on SUB-D connector and the same pins on
the target microcontroller using DIP switches.
Since RS-232 communication voltage levels
are different than microcontroller logic
levels, it is necessary to use a RS-
232 Transceiver circuit, such as
MAX3232 as shown on
Figure 8-1.
UART
(universal
asynchronous
receiver/
Figure 8-1: RS-232 connection schematics
EasyPIC PRO
v7