User manual
RSKR8CLA8A 5. User Circuitry
R20UT0284EG0101 Rev. 1.01 Page 15 of 34
Jun 16, 2011
5.4 LEDs
There are five LEDs on the RSK board. The function of each LED, its colour, and its connections are shown in
Table 5-3.
LED Colour Function MCU Connection
PWR Green Indicates the status of the Board_VCC power rail. No connection
LED0 Green User operated LED. P6_1, Pin 74
LED1 Orange User operated LED. P6_2, Pin 73
LED2 Red User operated LED. P6_3, Pin 72
LED3 Red User operated LED. P6_4, Pin 71
Table 5-3: LED Connections
5.5 Potentiometer
A single-turn potentiometer is connected as a potential divider to analogue input AN8, (Port 6 bit 5, Pin 70). The
potentiometer can be used to create a voltage between VREF and ground (by default, VREF is connected to the
Board_VCC 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, LCD.
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 module supplied with the RSK board only supports 5V operation.
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 P6_7, Pin 68
5 R/W (Pulled to ground) - 6 DLCDE (pulled to ground) P6_6, Pin 69
7 No Connection - 8 No Connection -
9 No Connection - 10 No Connection -
11 SEG20_DLCDD4 P2_4, Pin 47 12 SEG21_DLCDD5 P2_5, Pin 46
13 SEG22_DLCDD6 P2_6, Pin 45 14 SEG23_DLCDD7 P2_7, Pin 44
Table 5-4: LCD Header Connections