Specifications

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IMPORTANT NOTE: The EM-X270 does not feature protection circuitry on the
DC_VBAT line. It is connected directly to the positive terminal of the battery.
Simultaneous connection of a battery and an extender board with a power supply circuit is
unsafe and will cause irreversible damage to the battery and EM-X270’s electronic circuits.
The GND line is connected to the general ground plane of the EM-X270. Connect these
signals to the extender board ground. All GND pins should be connected.
Miscellaneous Signals
EM-X270
Name
PXA270
Name
Voltage
Level
Type Description
EXT_PWR_EN GPIO_97 3V I/O PXA270 GPIO line. Used in the EB-
X270 reference design as a power
enable line for the extender board
circuitry.
EXT_IRQ1# GPIO_114 3V I/O PXA270 GPIO line. Pulled up on the
EM-X270 board. Used in the EB-
X270 reference design as an interrupt
input line for the extender board
circuitry.
EXT_IRQ2 GPIO_41 3V I/O PXA270 GPIO line. Pulled down on
the EM-X270 board. Used in the EB-
X270 reference design as an interrupt
input line for the extender board
circuitry.
EXT_RST# GPIO_38 3V Output External board reset output. Active
low.
LIN_L, LIN_R - Analog Input Audio line inputs. See chapter 3.4 for
details.