101-0506 Rabbit Semiconductor, 101-0506 Datasheet - Page 133

• Manufacturer Part Number: 101-0506
• Description: CARD CPU SR9160 128K SRAM SMRTST
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0506

• Accessory Type: Smart Star CPU Card
• For Use With/related Products: SR9160
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

B.2 Contrast Adjustments for All Boards
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 KDU5V
LCD/keypad module for use with the Smart Star — these modules operate at 5 V. You may
adjust the contrast using the potentiometer at R2 as shown in Figure B-3. LCD/keypad
modules configured for 3.3 V should not be used with the 5 V Smart Star because the
higher voltage will reduce the backlight service life dramatically.
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 5 V by removing the jumper that
was installed at the factory across pins 1–2 on header J5 as shown in Figure B-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-
Figure B-3. LCD/Keypad Module Voltage Settings and Contrast Adjustment
ment potentiometer at R2 are limited to operate only at 5 V, and will work with the
Smart Star. The older LCD/keypad modules are no longer being sold.
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