Matrix Orbital LCD0821 Legacy User Manual
Page 18

LCD0821 rev 2
18
Custom characters occupy a 5 x 8 pixel matrix. Built-in characters are 5 x 7: the bottom row of pixels is
normally reserved for the underline cursor. The underline cursor should be turned off if the bottom row of
pixels forms part of a custom character.
The characters are defined by issuing the command 254 78 [c] followed by 8 bytes to define the character.
[c] is the character number (0x00 to 0x07). The 8 bytes are mapped as shown below:
MSB
LSB
* * * 1 2 3 4 5 Data
Byte
1
*
*
*
6
7
8
9
10 Data Byte 2
*
*
* 11 12 13
14 15 Data Byte 3
*
*
* 16 17 18
19 20 Data Byte 4
*
*
* 21 22 23
24 25 Data Byte 5
*
*
* 26 27 28
29 30 Data Byte 6
*
*
* 31 32 33
34 35 Data Byte 7
*
*
* 36 37 38
39 40 Data Byte 8
A "1" bit indicates an on (black) pixel, a "0" bit indicates an off (clear) pixel.
Once defined, a character is displayed simply by issuing a value (0x00 to 0x07) corresponding to the
character number. The character will be laid out as follows:
- GTT35 (19 pages)
- GTT50A (53 pages)
- GTT70A (19 pages)
- GTT38A (19 pages)
- GTT43A (19 pages)
- GTT50A (19 pages)
- GTT Example Files (2 pages)
- GX24064 (24 pages)
- GLT24064R-1U (72 pages)
- GLT24064 (71 pages)
- GLT24064 Legacy (56 pages)
- GLK24064-25 Legacy (41 pages)
- GLK24064-25 Legacy (47 pages)
- GLK24064-25 Legacy (68 pages)
- GLT240128 (70 pages)
- GLT240128 Legacy (70 pages)
- GLK12232-25-SM (70 pages)
- GLK12232-25-SM Legacy (41 pages)
- GLK12232-25-SM Legacy (42 pages)
- GLK12232-25-FGW (66 pages)
- GLK19264A-7T-1U (68 pages)
- GLK240128-25 Legacy (67 pages)
- GLC24064 (44 pages)
- GLC24064 (63 pages)
- GLK12232-25-WBL (39 pages)
- GLK19264-7T-1U (71 pages)
- GLK24064-16-1U (48 pages)
- VK162-12 (41 pages)
- LK162-12 Legacy (37 pages)
- LK162-12 Legacy (42 pages)
- LK162A-4T (36 pages)
- LK162B-7T (37 pages)
- VK202-25-USB (42 pages)
- LK202-25 Legacy (20 pages)
- LK202-25 Legacy (37 pages)
- LK202-25 Legacy (50 pages)
- VK204-25 (47 pages)
- LK204-25 Legacy (33 pages)
- LK204-25 Legacy (62 pages)
- LK204-7T-1U (40 pages)
- LK402-25 (43 pages)
- LK402-25 Legacy (56 pages)
- LK404-25 (37 pages)
- LK202-24-USB (36 pages)
- LK202-24-USB (48 pages)