Phytec 1337.1, Hardware Manual

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Power
©
PHYTEC Messtechnik GmbH 2011 L-758e_1
13
3 Power
The display adapters operate off two supply vo3.3V and +5V.
They are already prepared for using a third supply v12V up to
+24V for driving more powerful backlights.
Low-c3.3V fed through the Display Data Connector X5 is
intended for supplying the photo sensor, EEPROMs, etc. It should not
be used to supply a display or backlight. Only in case of connecting
low-current displays, it might be possible to renounce the Display
Power Connector. A green LED indicates power presence.
+3.3V with a 1A load will be fed through the Display Power
Connector X3. It supplies the display and the backlight converter. A
green LED indicates power presence.
+5V with a 2A load will also be fed through the Display Power
Connector X3. It will be converted to the power needed for the
backlight. A green LED indicates power presence.
Caution:
For maximum EMI performance we recommend as a general design
rule to connect all GND pins to a solid ground plane.