STLED524 datasheet(67/72 Pages) STMICROELECTRONICS

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STLED524

Application information

Scroll parameters have to be set by writing data:

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

Byte 2 is the address where writing starts.

Byte 3 contains data written to address 30h (scroll control 1 register). This sets the scroll

speed to 5 and direction.

Byte 4 contains data that are written to address 31h (scroll control 2 register). This sets the

number of blank rows to 2.

Scroll and insertion of blank rows/columns have to be enabled by writing to the display

visual control register, in the following table:

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 control register). Value 24h enables

insertion of blank columns/rows and enables the scroll.

Scroll operation starts by writing to the display control register. This changes DISP bit value

from 01 to 10 and so the scroll operation begins. Pattern 1 is replaced by pattern 2.

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 01h (display control register).

Table 67. SPI data to display in pattern 1(example 5)

Byte index

Data

0x00

0x01

Table 68. SPI data for scroll setup

Byte index

Data

0x00

0x30

0x13

0x40

Table 69. SPI data to enable scroll operation with blank rows/columns

Byte index

Data

0x00

0x20

0x24

Table 70. SPI data to start scroll operation

Byte index

Data

0x00

0x01

0x02

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