Datasheet

10
Chapter 6. User Circuitry
6.1. Switches
There are four switches located on the RDK board. The function of each switch and its connection are shown in Table
6-1.
Switch Function RL78
SWITCH 1 Connects to an interrupt line for user controls. INTP0, P137 (pin 9)
SWITCH 2 Connects to an interrupt line for user controls. INTP1, P50 (pin 33)
SWITCH 3 Connects to an interrupt line for user controls. INTP2, P51 (pin 34)
RESET When pressed, the RL78 is reset. /RESET , (pin 6)
Table 6-1: Switch Functions
6.2.Debug LCD Module
A debug LCD module is supplied on the RDK. The debug LCD module uses an SPI interface to reduce the pin allocation.
Software contrast control is also provided. The module supplied with the RDK uses 3.3v. The display is a 96 x 64
graphics display and uses a white LED backlight. The backlight is on by default and can be toggled OFF by setting P70
(BL-ENA) low. Note there is a footprint, LCD1, for a 2 x 8 character display. This display is not populated – but can be
used in a standard 4 bit nibble configuration if desired. Table 6-2 shows the pin allocation and signal names used for the
graphics LCD connector.
Pin Circuit Net Name RL78 Pin Circuit Net Name RL78
1 +5V Backlight Positive Anode - 2 GND -
3 GND - 4
GND
-
5 GND - 6
LCD-CS
P10 (pin 46)
7 RSTOUT# P130 (pin 57) 8 LCD-RS P15 (pin 41)
9 +3.3V - 10 +3.3V -
11
SCK
P04 (pin 58)
12
MOSI
P02 (pin 60)
13
MOSI
P02 (pin 60)
14
MOSI
P02 (pin 60)
15
+3.3V
- 16
+3.3V
-
17
+3.3V
- 18
+3.3V
-
19
GND
- 20
+3.3V
-
Table 6-2: Debug LCD Module Connections (J8)