30058 Parallax Inc, 30058 Datasheet - Page 49

• Manufacturer Part Number: 30058
• Description: SER LCD 4X20 W/KEYBRD INTERFACE
• Manufacturer: Parallax Inc

Specifications of 30058

• Interface: Serial
• Display Type: LCD - Monochrome
• Display Mode: Reflective
• Viewing Area: 82.20mm L x 18.20mm W
• Backlight: LED - White
• Character Count X Line: 20 x 4
• Module Size (w X H X T): 98 mm x 60 mm x 27.5 mm
• Voltage Rating: 4.75 V to 5.25 V
• Operating Temperature Range: 0 C to + 50 C
• For Use With: 27963 - SOLUTIONS CUBED: MEMKEY
• Dot Size: -
• Dot Pitch: -
• Dot Pixels: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q2089249

10.7 Set and Save Contrast
Matrix Orbital
Description
Remembered
Factory Default
Syntax
Parameters
Description
Remembered
This command sets the display’s contrast to [contrast], where [contrast] is
a value between 0x00 and 0xFF (between 0 to 255). Lower values cause
‘on’ elements in the display area to appear lighter, while higher values
cause ‘on’ elements to appear darker. Lighting and temperature condi-
tions will affect the actual value used for optimal viewing. Individual
display modules will also differ slightly from each other in appearance.
In addition, values for optimal viewing while the display backlight is on
may differ from values used when backlight is off.
This command does not save the [contrast] value, and is lost after power
down; but this command has the option of remembering the settings
when issued with the Remember function ‘on’ . When this is the case,
this command is the same as the Set and Save Contrast command.
Yes
128
This command sets the display’s contrast to [contrast], where [contrast] is
a value between 0x00 and 0xFF (between 0 to 255). Lower values cause
‘on’ elements in the display area to appear lighter, while higher values
cause ‘on’ elements to appear darker. Lighting conditions will affect the
actual value used for optimal viewing. Individual display modules will
also differ slightly from each other in appearance. In addition, values for
optimal viewing while the display backlight is on may differ from values
used when backlight is off.
NOTE This command saves the [contrast] value so that it is not lost after power down.
Yes
Hexadecimal
Decimal
Parameter
contrast
0xFE 0x91 [contrast]
254 145 [contrast]
LK204-25
Length
1
Description
Contrast value (0 to 255).
45