Power, Clock and Reset
S5U13781R01C100 Shield Board
Seiko Epson Corporation
13
(Rev.1.02)
4 Power, Clock and Reset
4.1
Power
The IO voltage supported by the S1D13781 LCD controllers mounted on the S1D13781 Shield TFT
board supports 3.3V only
, so the Arduino board must be able to provide 3.3V IO. The board has a green
LED to indicate when 3.3V power is present.
Depending on the current required by the LCD display backlight, the current required may be from
around 100mA to a maximum 850mA. If the 3.3V power is not capable of providing the required current,
the board can use 5V power, in addition to 3.3V. In this case, the maximum current required on 3.3V
power can be 30mA (assuming the LCD display logic power supply does not need more than 30mA) and
the maximum current required on 5V power can be up to 600mA (depending on the LCD display
backlight current requirement). Both 3.3V and 5V power is provided to the board on connector J1 and it
will be provided by the Arduino CPU boards.
In order to use +5V power for the display backlight, some modifications are required to the S1D13781
Shield TFT board. These resistors are located on the top of the board.
•
Remove 0 ohm resistor R15 and R13
•
Solder 0 ohm resistors R16 and R14
Required Modifications for +5V Power for Backlight
Содержание S5U13781R01C100
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