STLED524 datasheet(65/72 Pages) STMICROELECTRONICS

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STLED524

Application information

6.2

Operation examples

6.2.1

Example 6 - how to display patterns

Some patterns have already been written into pattern 1 and 2 memories as described in the

previous example. EN bit has to be set to 1 and DISP register value has to be set to 01 (for

pattern 1) or 10 (for pattern 2). EN bit is located in the software control register whose

address is 00h and DISP bits are located in the display control register whose address is

01h. As registers are located next to each other they can be written at once as it is shown in

Table 60 and Table 61.

Note:

Byte 1 represents SPI command to write to the control register memory. Byte 2 is the

address where the writing starts. Byte 3 contains data written to address 00h (software

control register). Byte 3 contains data written to address 01h (display control register).

6.2.2

Example 7 - how to enable slope operation

When slope operation is being activated, a pattern, containing non-zero slope data, has to

be used. Such patterns are in examples 1, 3 and 4. In example 2, pattern has all slope

data = 0. Let's suppose that a pattern with non-zero slope data has been already written into

pattern 1 memory. First of all, we enable slope operation by setting SLPEN bit to 1.

Byte 1 represents SPI command to write to the control register memory.

Byte 2 is the address where the writing starts.

Byte 3 contains data written to address 20h (display visual control register).

As per example 6, we display pattern 1 by writing data to Table 63 or pattern 2 by writing

data to Table 64 .

Table 60. SPI data to display pattern 1

Byte index

Data

0x00

0x01

Table 61. SPI data to display pattern 2

Byte index

Data

0x00

0x01

0x02

Table 62. SPI data to enable slope operation

Byte index

Data

0x00

0x20

0x08

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