RRSS--223322 CCOOMMMMUUNNIICCAATTIIOONN
RS-232 communication enables point-to-point data transfer. It is commonly used in
data acquisition applications for the transfer of data between microcontroller and a
PC. Since the voltage levels of a microcontroller and PC are not directly compati-
ble with those of RS-232, a level transition buffer, such as the MAX232, must be
used. In order to provide a more flexible system, the microcontroller is connected
to the MAX232 through the two jumper
groups: JP7 and JP8. The jumper group JP7
is used to connect the Rx line to RC7, RB2 or
RB1. The jumper group JP8 is used to connect
the Tx line to RC6, RB5 or RB2. Note that
JP7 and JP8 must not be connected to RB2 at
the same time. JP6 enables the connections of
RB0 pin to CTS and RC2 pin to RTS line for
implementing hardware handshaking.
RS-232 COMMUNICATION
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