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Technical Manual
ePanel-mgx
Hardware description
7.7. Smart Battery Charger
The smart battery charger is a charging circuit that provides the smart battery with charging current and
charging voltage to match the smart battery's requested requirements. This allows the battery to control its own
charge cycle, thus providing a chemistry independent interface to the battery system. Optionally, the smart
battery charger may not allow the smart battery to supply power to the rest of the system when the smart
battery is fully charged and the system is connected to AC power thus prolonging the life of the battery. The
smart battery charger will also receive critical events from the smart battery when it detects a problem. These
include alarms for charging conditions or temperature conditions which exceed the limits set within the particular
smart battery. Charging of the battery is independent of state of the CPU, thus allowing the battery to be
charged even if the CPU is powered down. Minimum/maximum charging voltage is 8V / 18.4V and minimum/
maximum charging current 7mA / 3A. Supply voltage has to be higher as peak charging voltage.
7.8. Video Input / Output
The SAA7118E is a combination of a four-channel analog preprocessing circuit including source selection, anti-
aliasing filter and ADC, an automatic clamp and gain control, a Clock Generation Circuit (CGC), a digital multi-
standard decoder containing two-dimensional chrominance/luminance separation by an adaptive comb filter
and a high performance scaler, including variable horizontal and vertical up and downscaling and a brightness,
contrast and saturation control circuit. The target application for the SAA7118E is to capture and scale video
images, to be provided as digital video stream through the image port of the VGA controller for overlay
purposes. Up to 16 CVBS, 8 S-VIDEO or 4 Component inputs are supported. Software control is integrated in
the system BIOS and sample applications are available.
7.9. Wide range DC Power Supply
The power supply of the board has an input range from 8V to 28V DC. The power supply switches over to
battery supply, if the main power supply voltage falls below 8V. All internal supply voltages are generated on
board.
7.10. PC-Card Interface
The PCI1410A device integrated onboard the ePanel-mgx is a high-performance PCI-to-PC Card controller
that supports a single PC Card socket compliant with the PC Card Standard. The PC Card Standard retains the
16-bit PC Card specification defined in PCI Local Bus Specification and defines the new 32-bit PC Card,
CardBus, as being capable of full 32-bit data transfers at 33 MHz. The PCI1410A device supports both 16-bit
and Card- Bus PC Cards, powered at 5V or 3.3V, as required. All card signals are buffered internally to allow
hot insertion and removal.
Page 37 of 45 Pages
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