Matrix-orbital LCD0821 Legacy Manual de usuario descargar pdf (Pagina 18)

LCD0821 rev 2

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:

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 28 29

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Matrix-orbital LCD0821 Legacy Manual de usuario Pagina 18