101-0530 Rabbit Semiconductor, 101-0530 Datasheet - Page 97

• Manufacturer Part Number: 101-0530
• Description: KIT TOOL FOR LP3500 INTL
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore 3000r
• Type: Single Board Computers (SBC)r

Specifications of 101-0530

• Contents: Demo Board, Serial Cable, Software and Documentation
• For Use With/related Products: Rabbit 3000-based products, except RCM30/3100, LP3500
• Lead Free Status / RoHS Status: Vendor undefined / Vendor undefined

C.2 Contrast Adjustment
Starting in 2005, LCD/keypad modules were factory-configured to optimize their contrast
based on the voltage of the system they would be used in. Be sure to select a KDU3V LCD/
keypad module for use with the LP3500 — these modules operate at 3.3 V. You may adjust
the contrast using the potentiometer at R2 as shown in Figure C-3. KDU5V LCD/keypad
modules configured for 5 V may be used with the LP3500, but the backlight will be dim.
You can set the contrast on the LCD display of pre-2005 LCD/keypad modules by adjust-
ing the potentiometer at R2 or by setting the voltage for 2.8 V by connecting the jumper
across pins 1–2 on header J5 as shown in Figure C-3. Only one of these two options is
available on these older LCD/keypad modules.
User’s Manual
NOTE: Older LCD/keypad modules that do not have a header at J5 or a contrast adjust-
ment potentiometer at R2 are limited to operate only at 5 V, and will not work with the
LP3500. The older LCD/keypad modules are no longer being sold.
Figure C-3. LCD/Keypad Module Contrast Adjustment
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