GLK12232-25-SM Matrix Orbital, GLK12232-25-SM Datasheet - Page 29

• Manufacturer Part Number: GLK12232-25-SM
• Description: LCD Graphic Display Modules & Accessories White Background Blue Text
• Manufacturer: Matrix Orbital

Specifications of GLK12232-25-SM

• Pixel Density: 122 x 32
• Module Size (w X H X T): 86 mm x 35 mm x 14.4 mm
• Viewing Area (w X H): 60.2 mm x 18 mm
• Backlighting: White
• Background Color: Blue, White
• Operating Temperature Range: - 20 C to + 70 C
• Attached Touch Screen: No
• Product: Graphic LCD Module
• Style: LCD Graphic Display
• Interface: RS-232, I2C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

because each vertical column is simply one byte (lsb at the top). In this case, however, the font is only 7 bits
high so the bytes ’wrap around’.
LSB is at the top. Each byte is shown in a different colour in the diagram. When the bytes are straightened
out, it’s simple enough to find their hex values, which are shown in the diagram above each byte. Trailing
zero bytes at the end of narrow characters are not included in the file.
Matrix Orbital
Now the bitmaps have to be converted to bytes. If the font is 8 bits high it becomes a fairly simple job
We’ve marked in the bits that are set for the letter "h". Remember that the bytes are "inverted", i.e. the
The colours refer to:
0xFF
0x05
0x04
0x20
Font information
0xFF
0xB1
0x00
0x81
Figure 16: Bytes For a 7 Bit High Font
Figure 15: Bitmaps for h, i, and j
Table 5: Example of a File Font
0X05
0x14
0x80
0x07
header,
GLK12232-25-SM
0x07
0x03
0x07
character
0xC4
0x68
0x00
’h’,
0x6A
0x3E
0x17
character
0x00
0x04
0x10
’i’,
character
0x0F
0x7F
0x02
’j’.
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