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Jumper
JP4
JP6
4.6 Display LED/Backlight Driver (JP5, JP7)
The on-board Display Backlight driver has the following jumpers:
JP5
Provides control over the Shutdown pin (Active low) of Backlight Driver IC (U5)
JP7
Enables/Disables Backlight dimming capability.
Jumper
JP5
JP7
4.7 Push Buttons (SW4, SW5, SW6, SW7, SW8)
The following push buttons are available on the board. Please make sure that the internal
pull up(s) are enabled on the button pins before using them. If the use of button pins is
desired for some other pin function, this can be done without requiring any change on the
board. However, it should be ensured that the buttons are not pressed during the alternate
usage of the pins.
When pressed, pulls low MCU's INT11 (pin 159)
SW4
When pressed, pulls low MCU's INT13 (pin 99)
SW5
When pressed, pulls low MCU's INT14 (pin 100)
SW6
When pressed, pulls low MCU's INT15 (pin 160)
SW7
When pressed, pulls low MCU's INT12 (pin 98)
SW8
© Fujitsu Semiconductor Europe GmbH
Chapter 4 Jumpers and Switches
Setting
Description
Closed
Channel B of RE1 connected to ICU0 (pin 110)
Open
Channel B of RE1 disconnected.
Closed
Channel A of RE1 connected to ICU5_2 (pin 109)
Open
Channel A of RE1 disconnected.
Table 6. Jumper settings for Rotary Encoder RE1.
Setting
Description
1-2
Display backlight shutdown disabled (Shutdown pin
connected to 5V supply)
Connects MCU's P134 to Shutdown pin (Active
2-3
low) therefore allowing user-defined control.
Open
Shutdown pin is pulled low. Display backlight is
OFF.
Closed
Backlight Dimming enabled, circuitry connects to
PPG0_1 pin of MCU.
0%PWM Full Backlight Brightness
100% PWM Backlight off
Open
Backlight Dimming disabled. Fully bright display if
not shutdown.
Table 7. Jumper Settings for QVGA Display Backlight.
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UG-910097-11
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