User manual

RSKRX62T 5. User Circuitry
REJ10J2194-0300 Rev.3.00 Page 16 of 40
Nov 08, 2011
5.5 Potentiometer
A single-turn potentiometer is connected as a potential divider to analogue input AN0, P60. The potentiometer can
be used to create a voltage between AVCC and ground (by default, AVCC is connected to the board 5V supply).
The potentiometer is fitted to offer an easy method of supplying a variable analogue input to the microcontroller. It does
not necessarily reflect the accuracy of the controller’s ADC. Refer to the device hardware manual for further details.
5.6 Debug LCD Module
A debug LCD module is supplied with the RSK, and should be connected to the LCD header, LCD1.
Care should be taken when installing the LCD module to ensure pins are not bent or damaged. The LCD module is
vulnerable to electrostatic discharge (ESD); therefore appropriate ESD protection should be used.
The debug LCD module uses a 4-bit interface to reduce pin allocation. No contrast control is provided, as this is set
by a resistor supplied on the display module. Connection information for the debug LCD module is provided in
Table 5-4 below.
Debug LCD Header
Pin Circuit Net Name MCU Pin Pin Circuit Net Name MCU Pin
1 Ground - 2 Board_5V -
3 No Connection - 4 DLCDRS PE1, Pin 16
5 R/W (Pulled to ground) - 6 DLCDE (pulled to ground) PE0, Pin 17
7 No Connection - 8 No Connection -
9 No Connection - 10 No Connection -
11 MTIOC7D_DLCDD4 P90, Pin 50 12 MTIOC7C_DLCDD5 P91, Pin 49
13 MTIOC6D_DLCDD6 P92, Pin 48 14 MTIOC7B_DLCDD7 P93, Pin 47
Table 5-4: LCD Header Connections
5.7 RS232 Serial Port
Serial port SCI0 is connected to the standard RS232 header fitted to the RSK. Alternatively, serial port SCI1 or
SCI2-A can be connected to the RS232 transceiver by making changes to the configurations to the jumpers and
option links (refer to §6). Connections between the RS232 header and the microcontroller are listed in the
Table 5-5.
SCI Signal Function MCU Connection RS232 Connection
TxD0 SCI0 Transmit Signal. PB2, Pin 33 Pin 2
RxD0 SCI0 Receive Signal. PB1, Pin 34 Pin 3
SCK0 SCI0 Clock Signal PB3, Pin 32 *
TxD1 SCI1 Transmit Signal. PD3, Pin 22 *
RxD1 SCI1 Receive Signal. PD5, Pin 20 *
SCK1 SCI1 Clock Signal PD4, Pin 21 *
TxD2-A SCI2-A Transmit Signal. PB5, Pin 28 *
RxD2-A SCI2-A Receive Signal. PB6, Pin 27 *
SCK2-A SCI2-A Clock Signal PB7, Pin 26 *
Table 5-5: Serial Port Connections
* This connection is a not available in the default RSK configuration - refer to §6 for the required modifications.