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Electrical Characteristics
1.4.
The SLCD+ board takes in two voltages. One is simply passed though to the backlight
inverter, and is typically either 5V or 12V. The SLCD+ itself requires 5V. For other
hardware options, contact Reach Technology Inc.
The SLCD+ is designed for panels with VCC of 3.3V and built-in DC-DC converters and
therefore do not need high positive or negative voltages. A list of compatible panels in
provided in Appendix A.
Typical current draw is as follows:
State
No panel attached, beeper quiet
No panel attached, beeper active
In general, the panel backlight power requirements dominate the power budget.
Environmental
1.5.
The standard SLCD+ controller is rated for commercial temperature operation of 0 to 70ºC.
An industrial grade -40 to 85ºC version is available as a special order. Note that most LCD
panels have a limited operating temperature range of -20 to 70ºC.
Panel support
1.6.
The SLCD+ is factory programmed with panel configuration-specific firmware that
includes panel type, orientation (landscape / portrait), backlight inverter control polarity,
and touch panel orientation. Panel types include passive color (CSTN), or active matrix
(TFT). Different commands and connection options may not apply depending on the
firmware programmed on a given board. For example, there is contrast adjustment for
passive panels but not for TFT panels. Please note that both landscape and portrait display
modes cannot be supported by the same firmware; that is, the panel orientation cannot be
changed "on-the-fly". The firmware is in-system-upgradable to support different
requirements and version upgrades.
Upgrade options
1.7.
Reach has an upgrade to the SLCD+ that can provide more performance and supports
larger panels. To provide for such an upgrade, the four mounting holes that are symmetric
with respect to the board outline are recommended for use.
SLCD+ Controller Manual V1.1
mA
40
80
8/14/2009
Page 10
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