20-101-0525 Rabbit Semiconductor, 20-101-0525 Datasheet - Page 97

• Manufacturer Part Number: 20-101-0525
• Description: COMPUTER SINGLE-BOARD LP3500 FOX
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0525

• Module/board Type: Single Board Computer Module
• Product: Modules
• Processor Type: Rabbit 3000
• Sram: 512 KB
• Flash: 512 KB
• Timers: 8 bit, 10 bit
• Number Of I/os: 26
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 3 V to 30 V
• Board Size: 93 mm x 66 mm x 11 mm
• Description/function: Computer Module
• For Use With/related Products: LP3500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1115

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
×
91