MIKROE-453 mikroElektronika, MIKROE-453 Datasheet - Page 14

• Manufacturer Part Number: MIKROE-453
• Description: Development Boards & Kits - PIC/DSPIC LV18F V6 DEVELOPMENT SYSTEM
• Manufacturer: mikroElektronika

Specifications of MIKROE-453

• Rohs: yes
• Product: Development Kits
• Core: PIC
• Interface Type: ICD, IDC10, JTAG, RS-232, USB
• Operating Supply Voltage: 5 V, 9 V to 32 V
• Data Bus Width: 8 bit
• Description/function: Development Board Only, Touch Screen, Pencil, DS1820, LCD, Serial Cable, GLCD not included
• Dimensions: 265 mm x 220 mm
• For Use With: PIC

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MikroElektronika
9.0. RS-232 Communication Interface
The USART (Universal Synchronous/Asynchronous Receiver/Transmitter) is one of the most common ways of exchanging data between
the PC and peripheral units. RS-232 serial communication is performed through a 9-pin SUB-D connector and the microcontroller
USART module. The LV 18F v6 provides two RS-232 ports, RS-232A and RS-232B. Use switches marked as RX232-A (RC7 or RB5
pin) and TX232-A (RC6 or RB7 pin) on the DIP switch SW12 to enable port RS-232A. Likewise, use switches RX232-B (RG2 pin)
and TX232-B (RG1 pin) on the DIP switch SW12 to enable port RS-232B. The microcontroller pins used in such communication are
marked as follows: RX - receive data line and TX - transmit data line. Baud rate goes up to 115 kbps.
In order to enable the USART module of the microcontroller to receive input signals with different voltage levels, it is necessary to
provide a voltage level converter such as MAX3238E.
The function of switches 1-6 on the DIP switch SW12 is to determine which of the microcontroller pins are to be used as RX and TX
lines, Figure 9-2.
Figure 9-2: RS-232 module schematic
NOTE:
Ports RS-232A and RS-232B are connected to the
microcontroller via pins RC7, RC6, RG2 and RG1
Make sure that your microcontroller is provided with the USART module as it is not necessarily integrated in all PIC
microcontrollers.
RS-232 connector
Figure 9-1: RS-232 module
LV 18F v6 Development System
LV 18F v6 Development System